TRQ2102 and TRT2102 Technical Reference Manual vers. 1.2

TRQ2102 and TRT2102 Technical Reference Manual vers. 1.2
TRQ2102 and TRT2102 Technical Reference Manual vers. 1.2
NT1-Plus
Model TRQ2102
and
TRT2102
Enhanced ISDN Network Termination
with two analog ports
Technical Reference Manual
Generic Edition
Installation MANUAL
COD. 074113017GB
DATE: September 2003
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SAFETY RULES
The change from cold to hot environments can cause the formation of condensate
inside the device. To avoid malfunctioning, wait at least 2 hours before connecting the
device to the supply mains.
Warning: for power supply connection use an easily accessible outlet located near
the device.
Never remove the mains plug for permanent connection.
WARNING: RISK OF ELECTRIC SHOCK
The power supply used by this device involves lethal voltage levels.
Connect the device to a power distribution system of TT, TN or IT type.
To guarantee continuous protection for operator safety, make sure that the mains
plug is always connected to the power source.
Remove the cover with a tool to access the connection and setting compartment.
Do not remove the protection against direct contact with live parts (with the exception
of authorized technical staff).
To guarantee the continuous protection for the operator’s safety, only use the mains
adapter provided with the device.
Do not access internal parts of the device (and/or of the power supply unit).
If objects or liquids penetrate inside the device, immediately disconnect the power
supply cable. Before using the device again, have it checked by specialized staff.
Refer to qualified staff for service.
In case of intervention, always check that the power supply has been completely and
successfully disconnected.
In case of fire, absolutely avoid using water to extinguish it.
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WARNINGS
CAUTION:
Many of the components used in this device are sensitive to electrostatic charge.
In case of manipulation of the connection cables, disconnect the power supply and
avoid direct contacts with the connector terminals.
When handling electronic components, to eliminate any statical electricity touch a
grounded surface. If possible, wear a grounding arm band.
Failure to comply with these warnings could cause permanent damage to device.
CLEANING
To clean the device use a soft cloth either dry or soaked with little detergent. Never
use any type of solvents, such as alcohol or gasoline, to avoid damaging the finish.
This producte complies with requirements of the EMC Directive 89/336/EC and Low
Voltage Directive 73/23/EC, as amended by Directives 92/31/EC and 93/68/EC.
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1
Introduction
This manual describes the functions, the installation and the configuration modes of the Aethra NT1+
(Mod. TRQ2102 and TRT2102). It contains useful information for using the system at its best.
The NT1+ is a network termination for the ISDN basic rate access, which adds to the features of a standard
ISDN network termination (NT1) a dual interface to analogue terminals designed for connection to POTS
(Plain Old Telephone System) networks.
These terminals include standard phone sets, group three fax machines, automatic answering machines,
data modems, small Private Branch Exchanges (PBX), Key Telephone Systems (KTS), cordless and DECT
phones, etc.
Using the NT1+, ISDN subscribers are not required to purchase any additional equipment, such as digital
ISDN phones and/or terminal adapters to deploy basic telephony services.
1.1 Glossary
The following terms will be used throughout this document:
ISDN
the Integrated Service Digital Network
PSTN or POTS
the standard analog phone network (Public Switched Telephone Network or Plain Old
Telephone System)
basic rate access (BRA)
the standard ISDN access, with one signalling and two user channels
user bus, "S" or "S/T" bus
a four wire bus used to connect user terminals to the NT1
multipoint access
an ISDN basic access configured to provide support for up to 8 terminals on the user
bus
point-to-point access
an ISDN basic access configured to provide support for a single terminal on the user
bus
ISDN terminal
a generic terminal designed for connection to the S bus such as an ISDN phone, a
videophone, a terminal adapter, a group 4 fax, a PC equipped with an ISDN board, etc.
analog terminal,
POTS terminal
a generic terminal designed for the connection to the PSTN such as a phone, a modem,
a fax, a key system, an answering machine, etc.
a/b port or a/b port
one of the two interfaces provided by the NT1+ for connection to analog terminals
normal conditions
the a.c. supply is available and adequate power is provided to the NT1+
restricted power
conditions
the a.c. supply is not available and the NT1+ uses the remote power from the
exchange to guarantee a (restricted) service to the user
local loop
the telephone line, consisting of a copper pair that connects the NT1+ to the ISDN
exchange
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1.2 Feature Summary
Standard NT1
•
•
2-wire interface on the U reference point
4-wire user bus on the S/T reference point
a/b ports
•
•
•
pulse and/or tone dialling, ringing signal, metering pulse generation
PCM speech coder/decoder, according to G.711, A-law
lifeline operation when mains power is not available
Maintenance
•
local system and port configuration and diagnostics
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2
System operation
2.1 Power Supply
The NT1+ has no batteries and is powered from the 230 V a.c. power. When a.c. power is not available,
the NT1+ uses the power supplied by the ISDN exchange through the local loop to provide two switchselectable restricted power modes:
• basic phone service through one of the a/b ports
• basic phone service through an ISDN phone connected to the S-bus
When in restricted power mode on a/b ports:
•
•
incoming calls are offered to both ports, provided that the call is compatible with the profile assigned
to each port, but only one port can be active at a time, i.e., going off-hook on one port automatically
disables the other one.
regular operation of the S-bus (i.e. activation, communications, etc.) is guaranteed and a phantom
voltage with limited power supply (25 mW) is provided across the S-bus to operate terminals that re
quire voltage on the S-bus to detect connection.
2.2 The S0 interface
On the S0 interface the NT1+ provides the same quality of service of a standard NT1, allowing the
connection of up to 8 TE's in any bus configuration (short, extended) and a complete transparency to test
procedures from the exchange.
Normal PS1 phantom power is provided to the S0 bus when local ac power is available.
If the S0 bus restricted power mode is selected the NT1+ provides reversed polarity phantom power up to
420 mW when ac power is not available.
If the a/b mode is selected, the NT1+ only provides a limited power (25 mW) voltage for terminals that
use a connect detect feature. Nevertheless, transmission functions on the S bus are fully operational.
2.3 The a/b ports
The NT1+ provides for PCM A-law speech coding and decoding and signalling functions as necessary to
operate any analog device, such as phones, modems, group 2/3 fax machines, automatic answering
devices, small analog PBX, etc.
Signalling functions include:
• hook status detection
• ringing
• support for both pulse and DTMF dialling,
• support for register recall or hook-flash key to operate supplementary services
• generation of metering pulses,
• generation of the display of calling line ID (CLID),
Local tones are generated when required (e.g. dial tone, congestion and call waiting).
2.4 Supplementary Services
Supplementary services offered by the NT1+ fall in two broad categories:
•
•
services that rely upon network provided supplementary services (e.g. call hold, call forwarding,
three party conference, etc.)
locally implemented services that do not imply a direct interaction with the network
2.4.1
The ISDN Supplementary services
Most ISDN supplementary services are related to the deployment of advanced telephony services (e.g.
call waiting, call forwarding, calling line indication, etc.) and, from the user's perspective, bear a close
resemblance to the corresponding services provided by the analog networks.
The NT1+ supports a large number of such services:
number identification services
MSN
• multiple subscriber number
CLIP
• calling line identification presentation
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CLIR
• calling line identification restriction
COLP
• connected number presentation
COLR
• connected number restriction
MCID
• malicious call identification
call completion services
HOLD
• call hold
CW
• call waiting
call offering services
TP
• terminal portability
CFU
• call forwarding unconditional
CFB
• call forwarding on busy subscriber
CFNR
• call forwarding on no reply
ECT
• explicit call transfer
CCBS
• call completion on busy subscriber
multiparty services
3PTY
• three party conference
community of interest services
CUG
• closed user group
charging services
AOC
• advice of charge
For these services, the NT1+ supports the ETSI Generic Functional Protocol (ETS 300 196-1) and the
relevant service specific signalling ETS, and it provides for the necessary mapping between these
protocols that describes user-network signalling and the various procedures available to the user in order
to activate, deactivate, interrogate or invoke the service.
2.4.2
Support for the Keypad Protocol
The NT1+ can be programmed to request the Call Forwarding Services using the Generic Keypad
Protocol, according to ETS 300 122-1, when this mode is supported by the network. See §5.16.3 for
further details.
2.4.3
The Local Services
A number of additional services is provided via the a/b ports, such as:
•
•
•
•
•
•
•
generation of Calling Line Identification (CLI) display services based on on-hook (ETS 300 659-1) and
off-hook (ETS 300 659-2) data transmission protocols The NT1-Plus can provide CLI services based on
using FSK or DTMF signaling;
generation of charging pulses, based on AOC (either currency of charging units) or Charge Advice
information element;
distinctive ringing patterns, in order to discriminate incoming calls based on the called party number
incoming call pick-up (i.e. the possibility to answer an incoming call ringing on the other a/b port;
timed fixed destination calls, using a pre-registered number (e.g. emergency or telco help-desk
calls);
internal call, between the two ab ports;
transferring call, it is possible to forward an external call between the two ab ports.
2.5
Configuration and diagnostic Features
The NT1+ allows for local and remote configuration of most of its operating features.
Local configuration can be carried out using a DTMF phone connected to one of the a/b ports or
connecting a PC to the auxiliary serial interface located under the cover lid using the AS-232 adapter.
Remote configuration can be carried out from a basic rate access; the phone number of this access must
have been registered in the NT-IP to be configured.
Aethra provides an application program running on any 32 bit Windows platform. This program makes use
of another NT-IP and of a specific driver to connect to the target NT-IP through the ISDN.
Diagnostic features include monitoring of microphone current and the ringing voltage, as well as the
detection of permanent short circuit condition and measure of the capacity at the a/b ports.
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3
ISDN Operation and Signalling Procedures
3.1 Standard NT-1 operation
NT1+ operates as a full service NT1 for the external native ISDN terminals (TE) connected to the S0 bus. To
such TE’s the NT1+ provides the following service:
•
•
•
•
support to up to 8 physical TE’s
"short bus" or "extended bus" configuration
handling of S0 activation and deactivation procedures at the physical layer
handling of the access collisions on the D-channel between the terminals connected to the S-bus and
the internal “terminal adapter” controller functions.
3.2 Layer One
3.2.1
Activation Procedures
When in normal power mode, downstream and upstream activations on the U interface are completed by
the internal “terminal adapter” controller functions irrespective of the presence of external TEs.
When activation is complete, the NT1+ sends the INFO2 signal on the S0 bus. This allows for immediate
activation of a TE plugged into the S0 bus when the U interface has already been activated.
The NT1+ also supports “partial” activation of the link using the UOA and SAI bits.
In restricted power mode on the S0 bus, the NT1+ does not complete a downstream activation if there is
no TE is connected to the S0 bus (i.e. the ACT bit is not returned to the LT until INFO3 is received on the
S0 bus).
3.2.2
Layer one initialization
When the remote power supply is removed for more than 2 seconds, the U-interface controller is reset.
No activity is started at the U-interface during this state. The "full reset" state (including reinitializing the
coefficients of the echo canceller) is entered after 4 seconds of removal of line power.
3.2.3
D-channel access control
The NT1+ has the following operational states to control the access to the D-channel on the part of
terminals connected to the S-bus and the internal a/b ports:
STATE 1:
(transparent)
STATE 2:
(blocked)
the NT1+ transmits to the LT the D bits as received from the S-bus; D bits received from the S-bus are
also echoed downwards on the E-channel.
When the D-channel is in IDLE mode (MARK state for at least 8 consecutive bits), the internal D-channel
controller can access the D-channel if there is some data to transmit by making a transition to state 2.
the NT1+ transmits to the LT the D bits as received from the internal D-channel controller; the E channel
is kept to the “SPACE” logical level, to inform the terminals connected to the S-bus that the D-channel is
not available.
Upon finishing transmission of every frame generated by the internal controller, the NT1+ reverts to state
1 for a time sufficient to allow external TEs to receive at least 10 ECHO at "mark" and therefore to gain
access to the D-channel (see ETS 300 012).
3.3 Layer Two
3.3.1
TEI Assignment
The NT1+ can be used on basic accesses configured for point-to-point or multi-point operation.
In the point-to-point mode, signalling procedures use a single fixed value TEI for all ports, programmed in
the range 0 to 631.
In the multi-point mode, each port uses a separate TEI value. TEI values are assigned by the network ondemand. Configuration calls are answered based using a TEI value from those assigned to a port.
NOTE: When configured to operate for point-to-point operation on TEI 0, the NT1Plus assumes the "line
doubler" operation mode (i.e. the S bus is disabled)
1 in the current version of the PC control program, only a fixed TEI value of 0 can be programmed
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3.3.2
TEI removal
Automatic TEI values assigned by the network are invalidated when the line interface is disconnected for
more than 2 sec. After such an event the NT1+ will request the network to assign new TEI when signalling
procedures require activation of layer two.
3.4 Layer 3
3.4.1
A/b Port profiles
The NT1+ allows to define a port profile for either a/b port. This profile affects both outgoing calls (the
BC and HLC i.e. in the SETUP message used to start the call) and incoming calls (compatibility checks on
incoming BC and HLC are performed according to the port profile):
• outgoing only
• Speech/Audio
• Telephony
• Group 2/3 fax
This mode prevents any activity in response to incoming calls (including TEI activation, layer two
outgoing only
establishment, etc). In any case, a device connected to the port is still able to place outgoing
calls: this can be used to establish calls from an inactive port without the need to reconfigure it.
speech/audio
this is a general purpose profile and it operates correctly independently on the type of device
connected to the a/b port.
It is therefore strongly recommended to program port profile to this value, unless some
special requirements exist.
telephony
this profile is used when only phones are connected to the port.
fax
this profile is used when only faxes are connected to the port.
The following table illustrates the coding of the BC and HLC i.e. included in the outgoing SETUP message
for every profile:
BC
Speech
BC
3.1 kHz
x
HLC
Telephony
HLC
Fax 2/3
Progress
Indicator
x
outgoing only
x
x
speech/audio
x
x
telephony
x
x
fax
Octet 3 and 4 of the Progress indicator (PI) i.e. are coded as 0x80 0x83, corresponding to
coding standard CCITT
location
User
description
origination address not ISDN
For incoming calls, the profile affects compatibility checks performed on the incoming SETUP.
Specifically:
Calls compatible with the SPEECH/AUDIO profile:
•
•
BC = "SPEECH"
BC = "3.1 kHz Audio", PI = ignored, HLC = ignored
Calls compatible with the TELEPHONY profile:
•
•
BC = "SPEECH", PI = ignored, HLC = absent or, if present, coded as "Telephony"
BC = "3.1 kHz Audio", PI = present, HLC = ignored or, if present, coded as "Telephony"
Calls compatible with the FAX profile:
•
BC = "3.1 kHz Audio", PI = ignored, HLC = void or, if present, coded as "Gr.2/3 Fax".
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4
Basic Call Procedures
This section describes basic call control procedures for voice calls. However, some references to the call
hold and the call waiting supplementary services are included in this chapter due to the close
relationship with basic call control procedures.
4.1 Timers
The following timers are used in these procedures
T701 wait for the first digit after R key pressed 6 sec
T702 guard time
4 sec
T703 delayed clear-forward
60 sec (def)
T704 hold/retrieve request timer
4 sec
NOTE: The T703 can be programmed for either port via the configuration registers 65 and 66 (see §6.7.3)
4.2 Placing Outgoing Calls
Upon detecting an off-hook condition, the NT1+ activates layer one and two (if not already active) and
transmits a SETUP message using BC and possibly HLC as described in § 3.4.1.
If layer one and two do not activate in the proper time or if the network rejects the cal attempt with a
with a RELEASE or RELEASE COMPLETE message, then the NT1+ sends a congestion tone and waits for the
user to hang-up. The user can however start a local service (such as CW activation) or the RESUME
request.
Upon receiving a positive acknowledge (SETUP ACK), NT1+ connects to the indicated B-channel, so that
the user may receive the dial-tone provided by the exchange.
If the first digit dialled is a number between 0 and 9, then NT1+ enters in the overlap sending state and it
sends INFO MESSAGES, with one or more digits included in the CALLED PARTY NUMBER i.e, coded with
"type of number: unknown " and "numbering plan: unknown".
When the NT1+ exits the “overlap sending state” (e.g. due to a CALL PROCEEDING or an ALERTING or a
CONNECT message received from the network), no further digit information is sent to the network. DTMF
tones are instead simply transmitted on the B-channel to make it possible to operate DTMF activated
services.
If the first digit dialled is either a * or a #, the NT1+ assumes that the user is starting a procedure
connected to a supplementary service. Subsequent operations are described in §5.1
4.3 Accepting Incoming Calls
The NT1+ perform compatibility checks on the Bearer Capability (BC), High Layer Compatibility (HLC) and
Called Party Number information elements2 of the incoming SETUP, as described in §3.4.1.
As a general rule, the NT1+ provides:
•
•
distinct responses for either port when in automatic TEI mode (e.g. separate ALERTING messages are
sent on the different TEIs associated with either a/b ports)
a single response for both ports when in fixed TEI mode
4.3.1
Fixed TEI mode
Upon receiving a SETUP with indication of the B-channel, the NT1+ acts as follows:
•
if neither port profile is compatible with the call, then it ignores the call (if a broadcast SETUP is
received) or it replies with a RELEASE COMPLETE, cause 88 “incompatible destination” if the SETUP is
received on a point-to-point link (i.e. on an assigned TEI)
• if at least one port profile is compatible with the call and that port is either free or busy and allowed
to process waiting calls, the NT1+ sends an ALERTING message, and generates the ringing current, or a
waiting call tone if the port is off-hook
• if all compatible ports are busy and not allowed to process waiting calls, then the NT1+ replies with a
RELEASE COMPLETE with cause 17 “user busy”
Upon receiving a SETUP with a "no channel" indication, the NT1+ process the call as a waiting call (see ETS
300 058) and:
2 the compatibilty check on the Called Party Number is automatically disabled when the NT1+ operates in restricted power mode.
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•
•
•
•
if neither port is compatible, then it ignores the call if a broadcast SETUP is received or it replies with
a RELEASE COMPLETE, cause 88 “incompatible destination” if the SETUP is received on a point-topoint link
it replies with ALERTING if the at least one port is compatible with the call and that port is busy and
allowed to process waiting calls
it replies with RELEASE COMPLETE with cause 17 "user busy", if all compatible ports are busy but not
allowed to process waiting calls
it replies with RELEASE COMPLETE with cause 34 "no channel available", if all compatible ports are not
busy
4.3.2
Automatic TEI mode
Upon receiving a SETUP with indication of the B-channel, separate processing occurs for either port:
•
if the port is not compatible, then it ignores the call or it sends a RELEASE COMPLETE, cause 88
“incompatible destination” if the SETUP is received on a point-to-point link
• if the port is compatible with the call and it is either free or it is busy but allowed to process waiting
calls, the NT1+ sends an ALERTING, and generates the ringing current, or a waiting call tone if the
port is off-hook
• if the port is busy and not allowed to process waiting calls, then the NT1+ replies with a RELEASE
COMPLETE with cause 17 “user busy”
Upon receiving a SETUP with a "no channel" indication, the NT1+ process the call as a waiting call (see ETS
300 058) and:
•
•
if the port is not compatible, then the NT1+ ignores the call
if the port is compatible, then:
• if that port is busy and enabled to process waiting calls, the NT1+ replies with ALERTING
• if that port is busy but not allowed to process waiting calls, the NT1+ replies with a RELEASE
COMPLETE with cause 17 “user busy”
• if that port is on-hook, then the NT1+ replies with a RELEASE COMPLETE with cause 34 “no channel
available”
4.4 Clearing Procedures
4.4.1
Locally Originated Disconnection (Clear Forward)
When detecting an on-hook condition, the NT1+ transmits a DISCONNECT message with cause 16, “normal
clearing”.
However, if the delayed clear forward features is enabled and if the call is an incoming one, then the
NT1+ starts the delayed clear forward timer and it only transmits the DISCONNECT when this timer
expires. The current call remains active and if the user goes off-hook she/he will be again connected to
the previous party. See also § 5.6.1.5 for clearing procedures when calls on hold are involved.
4.4.2
Remote Disconnection of an active call
Upon receiving a clearing message for an active call:
•
if the clearing message is a DISCONNECT message and if it contains a "Progress Indicator" i.e., then the
NT1+ maintains the connection on the B-channel used for the call, and it will complete the clearing
procedure:
• by sending a RELEASE when the user goes on-hook
• by sending a RELEASE COMPLETE if a RELEASE message is received from the network. In this case
the B-channel is released
• if the clearing message is a DISCONNECT without the "Progress Indicator" i.e., then the NT1+ sends a
RELEASE message and releases the B-channel;
• if the clearing message is a RELEASE, then the NT1+ replies with a RELEASE COMPLETE and releases
the B-channel
• if the clearing message is a RELEASE COMPLETE, then the NT1+ releases the B-channel.
For the last three cases, the NT1+ also sends a local congestion tone until the user hangs up or a timer of
30" elapses.
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5
Procedures for supplementary services
This section describes user and network procedures used to deploy supplementary services (see §2.4).
From the point of view of these procedures:
•
some supplementary services, such as MSN, CLIP and COLP, do not require any user procedure to
activate, deactivate or invoke the service.
• some services (e.g. call forwarding, CF) must be explicitly activated and deactivated by the user
and then they are automatically operated when needed (e.g. when an incoming call meets the
conditions for being forwarded). These services also usually support a status interrogation using
interrogation procedure.
• some services (e.g. 3 party conference, MCID) require instead an explicit invocation by the user to
operate.
To execute these procedures when using NT1+, the user usually presses a sequence of keys starting with *
or # on the phone keypad, and in some cases precedes this sequence by the action of the register recall
(RR) key (see § 5.2). These procedures usually mimic those used in POTS networks for the equivalent
services.
5.1 Operating supplementary services
When the user goes off-hook, the NT1+ immediately sends a SETUP and then connects the indicated
channel to allow the user to receive the dial tone generated by the switch. If the first digit dialled after
going off-hook is a numeric digit, then normal outgoing call establishment occurs
If the first digit dialled is either a * or a # the NT1+ assumes the user is starting a procedure related to
some supplementary service and immediately clears the initiated call. Subsequent digits dialled by the
user are then stored and analysed as a keypad sequence.
The NT1+ assumes that the sequence has one of the following formats:
*<service code># or *<service code>*<parameters>#
to activate or to invoke a service, or
#<service code># or #<service code>*<parameters>#
to deactivate a service, or
*#<service code># or *#<service code>*<parameters>#
to interrogate about the status of the service.
When the complete sequence has been entered, then the following cases apply:
•
if the service code is recognised as one related to a supplementary service provided by the network
using the functional protocol, then the NT1+ acts according to the mapping procedures defined for
that service;
• if the service code relates to a "local service" (e.g. CLI enable) then a local procedure is performed,
with no further action usually taken towards the network;
• if the service code is neither recognised as one related to a supplementary service provided by the
network using the functional protocol, nor as a "local service", then the complete keypad sequence is
transmitted "en-bloc" in the KEYPAD i.e. of a new SETUP message, according to the "stimulus"
procedure described in ETS 300 122-1.
In some cases, the keypad sequence can be collected and analysed after pressing the R key. This is for
example the case when, during an active call, the user presses R*79# to activate the suspend/resume
supplementary services.
NOTE: As an exception to the above rules and for compatibility reasons with existing POTS procedures,
keypad sequences using the service code 31 can also be terminated by using * instead of #: i.e. *31* and
#31* are considered as complete keypad sequences as fully equivalent to *31# and #31#.
As a programmable option, the NT1+ can provide locally generated voice announcements to notify users
with information returned from the network as a result of activation, deactivation, interrogation and
invocation procedures.
5.2 Using the R key
Some of the user procedures involving supplementary service require the use of the register recall (R)
key. This clause describes the use of this R key in general terms.
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When a call A is in its active phase, and the user presses the R key, then the NT1+ interrupts the speech
channel to the party connected in call A, generates a local dial tone and starts the T701 timer.
When T701 elapses, and no other key has been pressed, the NT1+ removes the dial tone and restores
speech channel to the party connected in call A.
If the user presses any key before the timer expires, the local dial tone is removed, and, depending on the
actual call state and on the key pressed, the NT1+ takes the appropriate actions as described below.
The R key is also used the retrieve a held call A if the new call B has not reached the active state.
5.3 Service codes
The following service codes are recognised to start local or network related procedures using keypad
sequences:
service
code
supplementary
service
type of
procedure
applies after
R during a call
note
01
closed user group
functional
YES
21
call forwarding unconditional
functional/stimulus
NO
programmable
31
caller ID restriction
functional
YES
37
call complet. on busy subscr.
functional
NO
41
read back charges for last call local
NO
43
call waiting
local
YES
53
hot line
local
YES
61
call forwarding no reply
functional/stimulus
NO
programmable
65
caller ID
local
YES
67
call forwarding busy
functional/stimulus
NO
programmable
79
suspend/resume
functional
NO
82
call pick-up
local
NO
2
Internal call – transferring call local
YES
All other service codes are treated as "unknown" and keypad sequences using such service codes are
transparently passed to the network.
5.4 Multiple Subscriber Numbers (MSN)
5.4.1
Description
This service allows for multiple telephone numbers (MSN's or directory numbers DNs) to be assigned to an
ISDN access. This basically permits the user to allocate distinct numbers to different terminals and/or
services. The maximum number of MSN's per access is a network option.
5.4.2
Procedures
Up to three MSN can be programmed into either port, using registers N1, N2 and N3.
The MSN contained in N1 has a special significance, because it is included as the "calling party number" or
as the "connected party number" in outgoing SETUP or CONNECT messages. These number are always
coded as "type of number: unknown" and "numbering plan: unknown".
If no number has been programmed for a port, incoming speech and audio calls will be offered to that
port independently of the called party number.
If one or more MSN have instead been programmed, then only the calls directed to one of the these
numbers will be offered.
It may be sufficient to program any number of digits as required to identify the number among those
assigned to the access. To allows for such partial programming of the MSN, the NT1+ aligns the received
Called Party Number and the programmed MSN to the right and then it verifies that the populated digit
positions coincide.
As a general rule, it is however safer to enter the whole MSN as some networks may not properly process
such abbreviated MSNs.
When in restricted power mode, no MSN compatibility check is performed. Incoming calls are offered to
a port based on the port profile and on the incoming call management parameter (global parameter 05).
This behaviour complies with ETS 300 082.
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5.5 Calling Line Identification Presentation (CLIP)
5.5.1
Description
This service allows the called subscriber to receive information regarding the identity (telephone number
and possibly subaddress) of the calling party. The calling user may either provide the calling number (in
this case the number is screened, verified and formatted by the network), or the network itself uses the
default accesses number. No checks are performed instead on the user-provided subaddress, which is
transparently passed to the called user.
The service is activated or deactivated by the network operator and therefore no user procedures related
to the service deployment.
5.5.2
Procedures
At the calling site, the NT1+ includes in the outgoing call set-up message the first programmed MSN
associated with the port that originated the call. If the first MSN is not programmed, then no information
is included.
CLIP information received on incoming calls is also used to generate CLI display messages on the analog
ports (see § 5.17)
5.6 Call Hold and Retrieve (HOLD)
This service enables a user to place an existing call into a stand-by state and, subsequently, to retrieve
the call. When the call is in the held state, the associated channel becomes available for use with other
calls by the same user (e.g. to start a new call or to accept a waiting call).
The HOLD service may available on a subscription basis or on a general basis.
The HOLD service is commonly used to start a new call or to accept a waiting call without releasing the
currently active one. When one call is active and another one is held, the user can then switch between
calls or activate other supplementary services such as Three Party or Explicit Call Transfer.
5.6.1
Procedures
As a general rule, a maximum of two calls can be queued at a single a/b port: as an example, if a
port already has an active and a held call, then that port is not allowed to start a third call and will
not receive indication of incoming calls.
5.6.1.1 Placing a second call
To start a second call when call A is established, the user presses the R key and starts dialling the number
of the remote party. The NT1+ issues a HOLD request as soon as the user starts dialling the new call.
As an exception, if call A is incoming, and the first digit dialled is 9, and no other key is pressed within
T702 seconds, the NT1+ takes this as a request for the MCID supplementary service and acts accordingly).
If the network rejects the request or if no response is received within T704 (e.g. due to the HOLD service
not being supported or available), then the NT1+ aborts the HOLD requests and restores the speech
channel to the party connected in call A.
If a positive acknowledge is received (HOLD ACK message) the NT1+ sends a new SETUP message,
including any digits dialled so far. Upon receiving the SETUP ACK reply message with indication of the
channel assigned to the new call, the NT1+ connects the a/b port to the indicated channel. Subsequent
digits are then sent in overlap mode.
During the establishment phase for call B (i.e. the call is in the dialling or the ringing phase), pressing R
again causes call B to be cleared and call A to be retrieved and reconnected.
Once the new call B is established (i.e. the CONNECT message is received), then the user can alternate
between the two calls assigned to the port or activate other supplementary services such as the three
party conference (3PTY) or the explicit call transfer (ECT).
When the user presses the R key after call B has reached the active state, only a limited numbers of
actions are allowed. After R, the user can dial:
•
•
•
0 to clear the call A on hold
1 to clear the active call B and retrieve the held call A
2 to place B on hold and retrieve A (alternate call)
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• 3 to place the calls in conference (3PTY)
• 4 to invoke the explicit call transfer service3 (ECT)
• 9 to invoke the MCID service on the active call (provided it is an incoming call)
Every other digit will be ignored and the speech channel to the currently active call will be reconnected.
5.6.1.2 Alternating calls (Broker’s call)
When the user presses R 2, the NT1+ first sends a HOLD request for call B. If the request is rejected or if
no answer is provided, then call B is reconnected. If call B is successfully placed on hold, then the NT1+
starts retrieving call A.
If the retrieve request for call A is rejected or no answer is received to the retrieve request, then the
NT1+ alerts the user with a short tone. Retrieving of call B is then started when the user presses the R
key or automatically after 5 sec.
If the retrieve request is for call A acknowledged, the NT1+ reconnects the port to the B-channel included
in the retrieve confirmation message for call A.
5.6.1.3 Remote clearing of the held call
Upon receiving a clearing message for the held call A, then the NT1+ completes the clearing procedures by
sending a RELEASE message and it sends a short local tone to alert the user of the call being cleared.
5.6.1.4 Remote clearing of the active call
Upon receiving a DISCONNECT or a RELEASE message for call B in the active or in the establishing phase
(the called party does not answer or is busy) with call A in the held state, then the NT1+ acts as follows:
•
•
if the clearing message is a DISCONNECT with PI, it keeps the connection to the B-channel to receive
any call progress signal sent by the network (clear-forward tone) and it starts retrieving the held call
either when the user presses the R key or automatically after 5". Upon retrieving call A, the release
procedure for call B is completed.
if the clearing message is a RELEASE then the NT1+ sends a RELEASE COMPLETE and it immediately
retrieves the held call.
5.6.1.5 Locally originated disconnection
When the user goes on-hook and an active call and a held call exist, then
•
if the "reminder ringing for held call" facility is deactivated, then both calls are immediately
disconnected
• if the "reminder ringing for held call" facility is activated, then:
• the currently active call B is disconnected and the NT1+ starts ringing the port to remind the user
that call A still is in the held state;
• when the user goes off-hook, then call A is retrieved and the speech channel is reconnected. The
reminder ringing has a maximum duration of 60 sec. After this time, if the port remains in the onhook state, then call A too is disconnected.
If a waiting call exists when the user goes on-hook, the a/b port rings to alert the user (see § 5.7.3)
5.7 Call Waiting (CW)
5.7.1
Description
This service allows the user to be notified of an incoming call, even when both channels on the user's
access are busy, and therefore no channel is available for the call. Were the CW service not available at
that access, then the call would be cleared with cause "user busy". Standard calls are offered with
indications of the associated channel, while call set-up messages for waiting calls bear the indication "no
channel available".
Upon receiving this notification, the user can take appropriate actions to make one channel available
(such as clearing or placing one of the existing calls on hold) and then answer the call.
The maximum number of waiting calls is a network option. The CW supplementary service is available by
prior arrangement with the network operator.
3 for billing purposes, most networks require that at least one of the calls be an outgoing one
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5.7.2
Procedures
The NT1+ uses audible tones (CW tones) to inform the busy user of a "waiting call".
As an extension to the standard service, the NT1+ also generates CW tones in the case that a "standard"
(i.e. non-waiting) call is being offered but the compatible port is busy.
Call waiting must be enabled by setting configuration register N9 position 2 to 1. Once enabled, the user
can dynamically activate, deactivate the CW service or interrogate on the activation status.
In order to activate, deactivate the CW service or to interrogate on the activation status, the following
key sequences can be used:
procedure
short format
activation
*43#
deactivation
#43#
interrogation
*#43#
Position 3 of register 4N holds the current status of the CW activation.
!
5.7.3
disabling CW tones may be necessary to
avoid interference with operation of modem
or fax devices.
Handling Waiting Calls
The user willing to take a waiting call C must disconnect or place the currently active call A on hold.
Call waiting (CW) tones are generated until the NT1+ receives an indication that call C is being released
(e.g. by expiry of a network implemented CW-timer or due to a disconnection originated by calling party
or when call is answered by another TE).
The SETUP message for this new call C may either contain the indication of the associated channel or it
may indicate "no channel available".
The CW tones have the following pattern: 150 ON, 150 OFF, 150 ON, 8000 OFF
Once alerted of the waiting call, the user can:
•
•
•
•
•
ignore the tones and continue call A
press R 0 to release the waiting call4
press R 1 to release call A and accept call C
press R 2 to place call A on hold and accept call C
press R 9 to invoke the MCID supplementary service (this applies to the call A, provided it is an
incoming one, and it has no effect on the waiting call C)
If the user goes off-hook and a waiting call is queued, the NT1+ rings the port.
If a digit different from 0, 1, 2 or 9, follows the R key, the NT1+ sends a 5 sec congestion tone to the port
to alert the user of the incorrect operation and then restores the previous situation. The user can
interrupt the tone by pressing R again.
5.7.3.1 Hold and answer (R 2)
The NT1+ first sends a HOLD request for call A. If the request is rejected or if no answer is provided, then
call A is reconnected, but call C remains queued to the port and call waiting tones are still generated.
If call A is cleared while this HOLD request is pending, a congestion tone is sent to the port and then the
user must then go on-hook to receive ringing for call C.
If call A is successfully placed on hold, then the NT1+ sends a CONNECT for the offered call. If the
network does not assign the call to the port (e.g. due to the call being assigned to another terminal on
the access), the NT1+ sends a congestion tone for 5 seconds (or until the R key is pressed) before
retrieving call A.
If the network assigns call C to the port, the NT1+ connects the port to the channel indicated in the
CONNECT ACK message received from the network.
4 this is only possible with dual TEI operation, where either port has its own TEI and therefore handles the call as if it were a distinct terminal. If single
TEI operation is programmed, this sequence has no effect.
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5.8 Restriction of caller's ID (CLIR)
5.8.1
Description
This service allows the calling user to request that her/his party’s number (and subaddress) is not
presented to the called party.
If the calling party has subscribed to the CLIR supplementary service in the permanent mode, then the
network automatically invokes the CLIR supplementary service for each outgoing call.
If the calling party has subscribed to the CLIR supplementary service in the temporary mode with default
value "presentation restricted", then the network automatically invokes the CLIR supplementary service
for each outgoing call unless the default value is overridden by a subscriber request at the time of call
request.If the calling party has subscribed to the CLIR supplementary service in the temporary mode with
default value "presentation not restricted", then the network only invokes the CLIR supplementary
service if requested by the subscriber at the time of call request".
NOTE: The CLIR service may not be available on a general basis.
5.8.2
Procedures
The CLIR parameter in the NT1+ operates like this:
CLIR
no prefix
register
0 (default) NO INDICATION
1
RESTRICTED
2
ALLOWED
3
RESTRICTED
where:
*31#
#31#
RESTRICTED
RESTRICTED
RESTRICTED
RESTRICTED
ALLOWED
ALLOWED
ALLOWED
RESTRICTED
• NO INDICATION means that octet 3a is NOT included.,
• RESTRICTED means that octet 3a is included and set to RESTRICTED
• ALLOWED means that octet 3a is included and set to ALLOWED
Therefore
•
Setting the CLIR parameter to 0 does not actually restrict or request presentation of the calls, but it
simply request the network to use the "default" presentation value, which may be either "allowed" or
"restricted", depending on a subscription option.
• Setting the CLIR parameter to 1 includes the request to restrict presentation for all calls, unless the
user prefixes #31# the presentation indicator is set to "allowed" for that call.
• Setting the CLIR parameter to 2 includes the request to request presentation for all calls, unless the
user prefixes *31#, as in this case the presentation indicator is set to "restricted" for that call.
• Setting the CLIR parameter to 3 includes the request to restrict the presentation for all calls, even if
the user prefixes #31#, as in this case. the presentation indicator is set to "restricted" for that call.
For all cases, the final result depends on the network: for example, if the network does not offer the CLIR
service on a general basis, and the user has not subscribed to the service, the number is presented
anyway.
If the user wants a permanent restriction, he/she can select one of the following options:
•
subscribe to the "permanent restriction". In this case the CLIR parameter can be set to any value, as
the call will be restricted anyway.
• subscribe to the "on a per-call basis, default restricted" and set the CLIR parameter to 0, 1 (this still
allow the user to request presentation on a per-call basis by prefixing #31#) or 3 (this does not allow
the user to request presentation on a per-call basis).
• subscribe to the "on a per-call basis, default allowed " and set the CLIR parameter to 1 (this still allow
the user to request presentation on a per-call basis by prefixing #31#) or 3 (this does not allow the
user to request presentation on a per-call basis).
If the user wants to restrict presentation on a per-call basis, he/she can:
•
subscribe to the "on a per-call basis, default allowed " and set the CLIR parameter to 0 or to 2.
He/she can request restriction on a per-call basis allow presentation by prefixing *31#.
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5.9 Connected Line Identification Presentation (COLP)
5.9.1
Description
The COLP service allows the calling subscriber to receive information regarding the identity (telephone
number and possibly subaddress) of the party answering the call (due to possible call diversions, this
number may be different from the called one).
5.9.2
Procedures
The NT1+ uses the first MSN for the relevant port and it includes this information (if present) in the
CONNECT message. This service is only supported in the outgoing direction: display of the connected
party number is not available on a/b ports
5.10
Connected Line Identification Restriction (COLR)
5.10.1 Description
The COLR service allows the answering user to request that the number (and subaddress) be not presented
to the calling party.
NOTE: the COLR service may not be available on a general basis
5.10.2 Procedures
Depending on the value assumed by the COLR parameter (register 4N, position 6), the outgoing CONNECT
message contains the CONNECTED PARTY NUMBER information element with a “presentation indicator” set
as shown in the following table:
COLR
Presentation indicator
register
0 (default)
NOT INCLUDED
1
RESTRICTED
2
ALLOWED
5.11
Malicious caller ID (MCID)
5.11.1
Description
Upon invocation of this service during an incoming call, the network registers and stores under control of
the network operator critical information regarding the call, such as calling and called party number, time
and date of the call. A subscription option allows for automatic registering of all unanswered calls.
The MCID supplementary service is available by arrangement with the service provider. Cancellation is at
the request of the subscriber or for service provider reasons.
5.11.2
Procedures
The NT1+ allows the user to invoke the MCID service by pressing
R 9
during the active phase of the call or immediately after the caller has disconnected.
5.12
Terminal Portability
5.12.1
Description
This service allows a user to suspend a call and subsequently to resume it at the same terminal and at the
same socket, or after moving the terminal to a different socket, or at a different terminal on a different
socket.
When the call is suspended, the network maintains the connection to the remote user and it stores
relevant information for the call (B channel), to allow the call to be re-established at a later time.
When suspending a call, the user may specify a "call identity", which has to be indicated when the call is
being resumed.
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5.12.2
Procedures
The TP service is used in the NT1+ to "transfer" active calls from one a/b port to the other. When a call is
active on one port (say, port 1), the user suspends the call by pressing:
R*79#
if no call ID is entered, or
R*79*1234#
if a call ID (e.g. "1234") is desired. The user then goes on-hook.
To resume the call at the other port (or on the same port), the user goes off-hook and dials
*79#
or, if a call ID has been associated with the call:
*79*1234#
Note that the suspended call can also be resumed from the same port.
5.13
3-Party Conference (3-Pty)
5.13.1
Description
This service enables the user with two ongoing calls (one active and one in the held state) to bridge the
two calls into a three-way conference, so that a three-way conversation is possible among the promoting
user and the two remote parties.
The promoting user has complete control over the conference, as he/she can disconnect or temporarily
exclude either remote party from the conference, or terminate the conference.
5.13.2
Procedures
The 3-party conference can be entered when one active call (A) and one held call (H) exist. The user
presses
R3
to join call H into the conference.
Subsequently the user can:
release the connection added on conference (H)
resume private conversation with A (H returns to the held state)
request explicit call transfer
release the connection to A and retrieve the connection to H to the active state
resume private conversation with H (place A on hold, retrieve H to the active state)
5.14
Closed User Group
5.14.1
Description
R
R
R
R
R
1
2
4
5
6
This service allows a user to be a member of one or more closed user groups. When such a membership is
established, the network performs special access checks over calls originated or received by the user.
Members of the same CUG are usually allowed to communicate among themselves, but calls leaving or
entering the group are usually restricted. Nevertheless, as subscription options, a CUG member can be
granted the right to place (Outgoing Access) and/or to receive (Incoming Access) calls outside the CUG
(non-CUG calls). Some additional restrictions can be placed on CUG members to prevent them from
placing (outgoing calls barred) or receiving calls (incoming calls barred) within the CUG.
The CUG service is available on a prior arrangement with the network provider.
As a subscription option, the user can subscribe to a preferential closed user group. In this case, outgoing
calls are by default treated as CUG calls, and no action is required on the part of the user's terminals to
place CUG calls.
If no preferential closed group has been subscribed to, then the user must explicitly indicate a CUG index
when placing a CUG call.
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5.14.2
Procedures
In the NT1+, a user with a preferential CUG places a call outside the CUG5 by dialling
*01#
in front of the called number. Calls within the CUG do not require any prefix.
Users without preferential CUG need to explicitly indicate a CUG index (in the example, 1 2 3 4) to place
CUG calls by dialling:
*01*1234#
in front of the called number. Non-CUG calls do not require any prefix.
5.15
Advice of Charge (AOC)
5.15.1
Description
This service allows the served user to receive charging information related to calls and to the invocation
or activation of supplementary services.
The AOC supplementary service is usually activated on a general basis, i.e. the served user receives
charging information at every call, but activation of the service may be required on a per-call basis.
The AOC service actually consists of three services:
•
the AOC-S provides information on charging rates at call set-up time and when charging rates change
during a call. The AOC-S can also be used to charge call attempts (i.e unanswered calls)
• the AOC-D service provides cumulative charging information during the active cycle of a call.
• the AOC-E service provides recorded charging information at the end of a call.
A network operator may choose to provide charging information either in "charging units" or in as a
currency amount.
5.15.2
Procedures
The NT1+ is able to process the received charging information and to generate "charging pulses" on the
a/b port that originated the call.
Generation of charging pulses is enabled for either port by setting the relevant configuration parameter
(registers N9, position 3) to 1.
Additionally, when charging information is provided as currency amount, the general configuration
parameter 08 contains the amount of currency equivalent to a charging pulse. This register contains 4
significant digits and an additional multiplier digit that specifies the number of digits after the decimal
point. For example, if 6.05 units of local currency correspond to a charging pulse, the register shall be
programmed either with "60503" or "06052".6
!
5.16
charging pulses may adversely affect
operation of modem or fax devices.
Call Forwarding Services (CF)
5.16.1 Description of the service based on the ETSI functional protocol
NOTE: This section applies to call forwarding services using the ETSI functional protocol specified in ETS
300 207-1.
These services are used to instruct the network to divert incoming calls to a different number. Three
different types of service are provided:
•
•
•
call forwarding unconditional (CFU) : all incoming calls are diverted
call forwarding busy (CFB): calls are diverted if they meet busy
call forwarding no reply (CFNR): calls are diverted if no reply is obtained from the called user
5 the user must have subscribed to the Outgoing Access (OA) option
6 Placing the correct value in this parameter is required to guarantee proper operation of the charging pulses, it the AOC indication is based on the
currency.
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If the user's access has the MSN service, then these services can be activated on a "served number" basis
rather than for the "whole access". This feature may not be available on a general basis: i.e. it may
require a specific subscription by the served user, or it may not be offered by the network provider.
Additionally, separate requests can be issued for different basic services (e.g. audio 3.1kHz, speech, 3.1
kHz telephony, unrestricted data, etc). This feature may not be available on a general basis. In any case,
the user can submit a request for diverting calls for "all services".
As each activation can specify a different "diverted-to" number, the user has the possibility to specify
different target numbers for each different service and for each different number on the access.
The CF supplementary services are offered on a subscription basis, with several notification options:
•
to the served user
• notification of forwarding
• notification of service being active7
• to the calling user
• notification of forwarding
• to the “forwarded-to user”
• presentation of the "served user" number when the diverted call is offered
Activation, deactivation and interrogation procedures are available.
5.16.2 Procedures using the ETSI functional protocol
The CF functional protocol allows the user to request activation, deactivation of the service and to
interrogate the status of the service. The "served user number" can be:
•
implicitly set to the first MSN assigned to the port originating the request by using the "short format"
sequences, or
• explicitly contained in the "long sequence" format
If the first MSN assigned to the port is empty and the "short" sequence format is used, then the "all
number" version of the request is used8.
All activation, deactivation or interrogation requests are issued for "all services".
This is summarised in the table below:
service
procedure
short format
long format
*21*<dtn>#
*21*<sun>*<dtn>#
activation
#21#
#21*<sun>#
CFU
deactivation
*#21*<sun>#
interrogation *#21*
*67*<dtn>#
*67*<sun>*<dtn>#
activation
#67#
#67*<sun>#
CFB
deactivation
*#67*<sun>#
interrogation *#67#
*61*<dtn>#
*61*<sun>*<dtn>#
activation
#61#
#61*<sun>#
CFNR
deactivation
*#61*<sun>#
interrogation *#61#
where <sun> stands for "served user number" and <dtn> stands for "diverted-to number".
This sequences are mapped into the proper FACILITY messages to the network to activate/deactivate or
interrogate the CF service.
Information on the outcome of these requests is provided via voice messages.
Upon interrogation the user receives information on the status of the service, and if the service is
activated, about the served user number and the diverted-to number9.
7 this notification occurs when the served user places an outgoing call
8 if the network does not support the "per served user number" option, it will however process the request as if contained "all number".
9 the activation, deactivation and interrogation requests may come out to be invalid in the case that the following conditions occur:
•
the network option "activation, deactivation and interrogation for all numbers" has the value "NO",
•
the MSN service is provided to the access,
•
the "all number" version of the request is used, due to the first MSN not being programmed.
In this case the first MSN MUST be programmed for the service to operate properly.
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5.16.3 Procedures using the stimulus protocol
The NT1+ also provides for support to the CF services using the stimulus procedures. Parameter 07
position 1 allows to select between support to functional or stimulus protocol.
In this case the activation, deactivation and interrogation sequences (i.e. with service codes 21, 67 and
61) are simply passed over to the network as stimulus keypad sequences and no special processing is
required on the part of the NT1+.
Information on the outcome of these requests are usually provided by the network using voice
announcements or confirmation tones.
5.17
Call Completion on Busy Subscriber
5.17.1 Description
The CCBS supplementary service enables user A, encountering a busy destination B, to have the call
automatically completed when the destination B becomes free without any further call attempts:
•
•
user A requests (“books”) the CCBS supplementary service
the network:
• monitors destination B for access resources (e.g. one B-channel) to become available
• waits for a short time left for user B to possibly reuse the resources for originating a call, then
indicates to user A that user B is free (recall)
• user A accepts the CCBS recall and transmit a SETUP message
• the network routes the call to user B.
The network may provide a subscription option which applies to the whole access:
Option
Value
Meaning
Recall
Global
recall is offered to all compatible terminals.
mode
Specific recall is only offered to the specific terminal that activated the CCBS service.
If the subscription option is not offered, one of the two values is chosen by the network provider.
5.17.2 Procedures
If the CCBS service is available at the user’s access, the original call that meets busy is cleared with a
clearing message with cause 17 ("user busy") or 34 ("no channel available"), and including a piece of
information indicating that CCBS requests are allowed (CallInfoRetain).
When this happens, the NT1+ first couples any tone sent by the network (typically a busy tone) and, after
a 3 second delay it generates a a voice announcement that invites the user to dial 510 to book a CCBS
recall.
For compatibility reasons, CCBS can also be booked by pressing the R key followed by the keypad
sequence *37# or by pressing the R key followed by 5.
Based on the network response to the CCBS invocation, a voice message informs the user on the outcome
of the request.
When the network ascertains that the called user is no more busy and the calling user is free, then it
sends the calling user a specific message indicating that the remote user has become free.
This message indicates whether the Global or the Specific Recall mode is in use and it also includes the
BC/HLC and the called party address of the original call:
•
if the Specific Recall Mode is specified, then only the port originating the CCBS Request can proceed
in this CCBS transaction.
• if the Global Recall Mode is specified and register 43 (see §6.6.7) is set to 1, then either port can
process the CCBS recall (even if the CCBS has been booked by a terminal on the S-bus), provided that
its BC/HLC port profile and one of the MSNs assigned to that port are compatible with the original call
The NT1+ rings "CCBS-compatible" ports using a special CCBS ringing pattern:
• 300 ms ON, 300 ms OFF, 300 ms ON, 300 ms OFF, 400 ms ON, 2400 ms OFF
If none of the CCBS compatible ports goes off hook within a certain (network dependent) time, the CCBS
request is cancelled by the network and the NT1+ stops ringing the ports.
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When a CCBS compatible port goes off hook, the NT1+ sends a SETUP message containing the BC (and
possibly HLC) i.e. of the original call, and another piece of information indicating that this is a CCBS
recall. This SETUP message does not contain the called address.
Upon receiving this SETUP, the network notifies all other terminals on the access that the CCBS-recall has
been assigned. This causes the NT1+ to cease ringing any port still involved in this CCBS transaction.
The call then proceeds as a standard outgoing call.
The user may also:
•
•
cancel the CCBS booking by going off-hook and pressing #37#
interrogate the status of the CCBS by going off-hook and pressing *#37#
5.18
Explicit Call Transfer (ECT)
5.18.1
Description
This service enables the user with two ongoing calls (one active call to A and one held call to B) to request
the network to join user A and user B in a single call. If the request is successful, the requesting user is
then disconnected while user A and user B remain connected.
5.18.2
Procedures
In the NT1+, the ECT is requested by pressing R 4 when a call is active and another call is on hold (this
also includes when the 3-PTY service is active).
5.19
Calling Line ID services
This service allows a user to be informed of the number of the calling party before answering a call. The
service is also known as "call line identification" (CLID) or "CLASS" services. To this purpose, a specific
display device must be connected to the a/b port or, alternatively, the display may be integrated in the
phone.
The NT1+ provides Calling Line Identification (CLI) display services for normal calls and for waiting calls.
Both the FSK and the DTMF-based CLI signalling are supported.
NOTE: CLI services for waiting calls are only available in FSK mode.
5.19.1
On-hook transmission
The procedure meets the requirements of ETS 300 659-1, for the "associated to ringing, during ringing"
method (§ 6.1.1).
CLI services are available for both ports in normal and in restricted power mode and in every situation:
e.g. simultaneous occurrence of call offering to both a/b, or when the other a/b port is already ringing,
etc.
The first ringing pulse is not delayed compared to the occurrence of the incoming call.
5.19.2
Off-hook transmission
The procedure meets the requirements of ETS 300 659-2.
When a waiting call occurs, the NT1+ cuts the speech path from the network and sends a specially coded
Dual Tone Alerting Signal (DT-AS) to the a/b port.
The NT1+ then waits for the display device to reply with a DTMF tone corresponding to the digit "D" or "A".
After receiving this tone, the NT1+ sends the CLI message, and then reconnects the speech channel.
5.19.3
Configuration
The NT1+ can select between FSK or DTMF signalling via the global parameter 44 (see § 6.6).
The user can enable the CLI service for either port by setting parameter N9, positions 6 and 7.
NOTE: if the DTMF mode has been selected, the off-hook CLI mode cannot be enabled. When reverting
the FSK mode, the off-hook CLI must be enabled if needed.
Once enabled via configuration, the user can "activate" or "deactivate" the CLI on the a/b port by going
off-hook and dialling *65# or respectively, #65#.
Interrogation of the activation status of the service is also possible by dialling *#65#.
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NOTE: After enabling the service via configuration register N9, the service must be activated by dialling
the *65# sequence. If the user attempts to activate the service when it is not enabled via register N9
results in a "service rejected" message.
5.19.4
Date and Time information
Some networks provide a “date and time information element” in the CONNECT or in other messages. The
NT1+ uses this information to update an internal clock.
After reset, the content of the internal clock is invalidated and are therefore not used. When a message
is received including this information, the internal clock is updated to the value indicated by the network
and is then kept running.
When this date and time information is available, it is included in the CLI message to be visualised by the
CLI display device.
NOTE: Date and time information is included in the CLI Message only in FSK signalling mode
5.19.5
Message structure for FSK signalling mode
When the FSK mode is active, the CLI data message consists of a “call setup” type message, followed by a
“date and time” parameter (when this information is provided by the network) and then by either
• an ASCII coded calling party number, or
• a “reason for no calling party number” parameter.
The “Reason for no calling party number” is visualised as:
“P” if the presentation indicator in the received calling party number i.e. is set to "restricted"
“O” if the SETUP does not contain a calling party number i.e. or digits are otherwise unavailable
5.19.6
Message structure for DTMF messages
When the DTMF mode is active the CLI message format is the following:
<A><A-number><C>
for standard CLI indication
<B><0><0><C>
for number non available
<B><1><0><C>
for number restricted
where <A-number> is the calling party number. The same rules as in the case of FSK signalling apply for
the representation of the number in DTMF digits.
5.19.7
Number representation
The representation of the calling party number depends on the received "type of number":
type of number
display
national
0 <digits in calling party number i.e.>
international
00 <digits in calling party number i.e.>
unkown
<digits in calling party number i.e.>
NOTE: If configuration register 07 position 3 is set to 0, then the initial 0 is not prefixed to the digits
contained in the national type of number format. This can be used for countries where the national type
of number already includes an initial 0.
5.20
Additional services
The following services do not strictly rely on network provided supplementary services, but they are
instead "local services".
5.20.1
Delayed clear-forward
This service allows a user with an incoming call active to go on-hook and to resume the call form another
phone connected to the same a/b port.
When this feature is enabled by setting position 4 of register N9 to the value 1, the NT1+ postpones the
clearing of incoming calls after the user going on-hook, so that the user is allowed to move the phone to
another socket or to resume the call from another phone. The delay is programmed in the range 1 to 120
seconds using the registers 65 (for the a/b port1) or 66 (for the a/b port 2).
NOTE
Delayed clear-forward is automatically disabled when more than one call is associated at the
a/b port (e.g. a call on hold).
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5.20.2
Distinctive Ringing
This service allows the user to receive different ringing patterns for incoming calls based on the called
MSN contained in the call-setup message.
For either port, the user associates a specific ringing pattern to each of the three available MSN's.
Distinctive ringing is enabled by placing 1 in position 4 of configuration register 4N.
The user selects the pattern to associate with every MSN by programming register 95.
The following patterns are provided:
id
0
1
2
3
4
5
1.0 ON
0.4 ON
0.6 ON
0.2 ON
0.7 ON
0.2 ON
pattern
-4.0 OFF
- 0.2 OFF – 0.4 ON - 4.0 OFF
- 0.2 OFF – 0.2 ON - 4.0 OFF
- 0.2 OFF – 0.6 ON - 4.0 OFF
- 0.1 OFF – 0.2 ON -4.0 OFF
- 0.1 OFF – 0.7 ON -4.0 OFF
5.20.3 Retrieving charging information for the last call
The user may retrieve charging information for the last (outgoing) call by going off-hook after the call has
been cleared by going off-hook and dialling *41#.
A voice message indicates accumulated charges for that call, including any call attempt charges for
unanswered calls.
If the user with an active outgoing call places a second call using the HOLD service, cumulative charges for
both calls are maintained.
5.20.4 Fixed Destination Calls ("Hot-Line" Calls)
This service allows a user to place a call to a selected number without any dialling. If the user goes offhook but does not dial any digit within a certain time, then the NT1+ automatically calls the selected
number. This service must be enabled using position A of register 9N.
Configuration register 3N is user acccessible and it holds the required parameters for either port. The
first two positions are set to 0 to disable the service. If not set to zero, these digit contains a value (1 to
30) which represents the timer duration in seconds. Subsequent digits are used to hold the fixed
destination number.
The user can program the fixed destination number11 by going off-hook and dialling:
*53*4567890#
where 4567890 represents the new fixed destination number.
Interrogation of the actual value of this number is possible by dialling
*#53#
The user can deactivate the service by dialling:
#53#
NOTE: the selected delay time must not interfere with timer T302. This timer is in the range 10 to 15
seconds and it is used by the switch to clear calls originated by the local user if no sufficient dialling
inform is provided.
5.20.5
Call Pick-up
When a call is ringing on one a/b port, the user can "capture" on his/her phone connected to the other a
call ringing on the other a/b port. This service must be enabled using position 2 of register 9N.
To capture the call when the other a/b port is ringing, the user goes off-hook and then dials:
*82#
11 the value of the FDC timer can only be modified in configuration mode.
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5.20.6
Internal call and transferring call
Making an internal call means connecting ab port1 and ab port2 without using B channels.
The internal call can only be done if the answering ab port is "idle".
Register 37 is used to enable/disable the internal call service: 1 enable (default) 0 disable. This register is
managed also by the user.
The internal call sequence is: *2# .
5.20.6.1
To make an internal call.
Lift the handset, pressing a specific sequence *2# in one ab port, the other ab port will begin to ring. If at
the ringing ab port the handset is lifted, ab1 and ab2 will enter in communication state.
5.20.6.2
To make a transferring call.
If an ab port (e.g. “ab1”) has an active external communication, pressing the sequence R *2# is possible to
make an internal call towards the other port “ab2”, while the external call will be placed on hold; if "ab2"
accepts the transferring call, "ab1" hangs up the handset and "ab2" enters in communication with the
external call.
Procedure for internal call and transferring call:
YOU WANT…
"ab1"
"ab2"
ACTION
User
EVENTS
Sequence
"ab1"
*2#
ACTION
User
Sequence
The ab2 port rings, answers and
communicates.
The ab2 port rings, answers to "ab1"
"ab1"
and accepts the external call.
"ab1"
EXT/"ab1"
"ab2"
R *2#
TWO ACTION ARE
POSSIBLE:
R *2#
R *2#
"ab1"
R *2#
R *2#
EXT
>> "ab1"/"ab2"
The ab2 port rings, answers to
"ab1" but refuses the external call, "ab1"
"ab1" resumes the external call.
"ab1"
or
"ab2"
R1
R
EVENTS WHERE "AB2" DOESN’T ANSWER:
While ab2 rings, "ab1" can resume
"ab1"
the external call.
In the ab2 port the “no-replay”
timer elapsed (60 sec.), the ab1
"ab1"
port rings and resumes the
external call.
R
*1#
R
If the “call waiting” is active, "ab1"
(or "ab2") answers and the other ab
port is disconnected.
Note: The above example sequences can be done between ab1 and ab2, and vice versa, because the
feature is available on both ab ports.
Meaning of symbols.
>>
Internal
call
Call
waiting
External
call
“ab..”
…/…
handset
Active
Handset lifted
hangs
up
communication User of a
(open
the
between two
ab port
(close the
communication)
users
communication)
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6
Configuration
6.1 General Information on Configuration Modes
Local and remote configuration procedures are provided to access and modify configuration and
diagnostics registers and to download the operating firmware. Generally speaking, configuration
parameters are divided in two broad categories:
• global parameters affect the general operation of the NT1+
• port specific parameters only refer to the operation of an individual a/b port
To prevent users from tampering with critical parameter, two local configuration modes are provided:
• a user configuration mode allows for modifying non-critical parameters
• an operator configuration allows for complete control over all the operating parameters
After downloading, the new firmware is stored on a secondary permanent read-only memory. This
firmware can be activated either immediately or at a later time using a separate activation command.
6.1.1
Local configuration
Two types of local configuration are possible:
tone based
using key sequences from a DTMF phone connected to an a/b port, with voice
messages guiding the configuration process
PC based
from a local PC connected via the AS-232 adapter to the internal serial port, located
under the removable cover. The PC runs the configuration program provided by
AETHRA for the MS-Windows 95® or Windows NT 4.0 (or later) environment.
6.1.2
Remote configuration
Remote configuration can also be accomplished in two ways:
tone based
using key sequences from a DTMF phone connected over the ISDN, with voice
messages guiding the configuration process
PC based
from a remote PC connecting to the NT1+ over the ISDN via an Aethra TA1008
terminal adapter. The PC runs the configuration program provided by AETHRA for
the MS-Windows 95® or Windows NT 4.0 (or later) environment.
6.1.3
PC Control programs
A Configuration Program with a user friendly graphical interface is available from Aethra to manage
remote and local configuration in the all 32 bit MS-Windows environment.
6.2 Accepting remote configuration calls
Remote configuration calls are accepted based on the calling party number and the called party
subaddress. Up two 20 distinct remote configuration numbers/subaddress pairs and one default
subaddress can be registered in the NT1+.
Numbers/subaddress pairs can have up to 21 digits and are stored in one of the following formats:
[1] <number>
[2] <number>/
[3] <number>/<subaddress>
When an incoming data call is offered, the NT1+ verifies if the Calling Party Number contained in the call
set-up message matches one of the registered configuration numbers.
If a match occurs:
•
•
•
if the matching number is stored in the format [1] (no "/") , than a called subaddress must be included
in the call set-up message and it must match the default subaddress. If no default subaddress is
registered, then the call is accepted independently on the received called subaddress.
if the matching number is stored in the format [2] ("/" and no indicated subaddress), than no called
subaddress is required in the call set-up and no check is performed on such element if present
if the matching number is stored in the format [3] ("/" followed by a subaddress), then the called
subaddress contained in the call set-up message must match the indicated subaddress
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Numbers/subaddress pairs are contained in configuration registers 70 to 89. The default subaddress is
contained in configuration register 90.
The proper remote configuration process (tone or PC based) is started according to the bearer service
indicated in the call set-up message: the tone-based mode is activated through speech or audio calls,
while the PC based process is activated through data calls.
A call meeting the required conditions (bearer service, calling party number / called subaddress) is
automatically answered by the NT1+, provided that both a/b ports are in the idle state (on-hook, not
ringing).
6.3 Downloading firmware upgrades
Local and remote PC-based configuration modes support software upgrades. The downloaded software is
automatically stored in a secondary non-volatile memory, and it can be activated at any later time after
download is complete.
The firmware is comprised of two main blocks: the code and the voice messages. A complete download
(code + voice messages) as well as a separate download for code of for message only is possible.
NOTE: Special care has been taken to preserve any existing configuration across upgrades. At compile
time, every configuration parameter can be flagged as "keep existing value" or "return to default ". At
activation time, each configuration parameters is acted upon based on the value of its flag.
6.4 Tone-based configuration procedures
6.4.1
Local operation
• Connect a DTMF phone to one a/b port.
To enter the operator configuration mode:
• disconnect any existing call
• disconnect the line pair
• connect a DTMF phone to one of the a/b port and lift the handset
• dial the access command sequence according to § 6.4.3
To enter the user configuration mode:
•
•
•
disconnect any existing call
connect a DTMF phone to one of the a/b port and lift the handset
dial the access command sequence
6.4.2
•
•
•
•
Remote operation
use a phone connected to an ISDN access whose number has been registered within the target NT1+
confirm that the Calling Line Id Presentation supplementary service is activated at the target access
dial the number of the target access
once connected, dial the access command sequence according to § 6.4.3
6.4.3
Access command
The access command sequence is the following:
#*##*#
When entering the command, keep pauses between digits to less than one second
6.4.4
Structure of Commands
Each command specifies a "parameter index". Some parameters can be read and modified. Some other
can be read, but not modified.
The following commands are used:
• modify commands, used for parameter configuration
• read commands, used to read the current value of a configuration parameter
• reset commands are used to restore configuration values to the factory default
Modify commands have the following structure:
* < index> * <value> #
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Read and reset commands have the following structure
* <index> #
6.4.5
Entering commands
When the NT1+ enters the configuration mode the device emits an audible tone. When the initial * key is
operated, the NT1+ stops the generation of the tone and prompts the user with the message:
"enter the parameter index":
The user enters a two digit code representing the parameter index and: terminated by the * key for
modify commands, or the # key for a read command. Only the last two digits entered are considered, so
in case of an error the user simply re-enters the correct digits and then press * or #.
If the entered index is not valid, a:
"wrong entry"
message is generated, followed by the audible tone indicating the ready state.
If the entered index is a valid one, then the user is prompted with a message:
"enter the parameter value".
6.4.5.1 Modify commands
The new value can now be entered, followed by the # key. Valid operations are confirmed via the
message:
"the parameter value <x> is <y>"
where <x> and <y> represent the address and the assigned value.
If the assigned value is incorrect, the following message is given:
"wrong entry"
The configuration mode can be interrupted at any time by going on-hook.
6.4.5.2 Read Commands
The current value of the requested parameter is indicated via the message:
"the parameter value <x> is <y>"
6.5 Description of configuration parameters
The NT1+ has a number of user programmable configuration parameters, contained in a non volatile
memory.
Some parameters (such as operating mode, access configuration, remote configuration numbers, etc.) are
global parameters as they refer to the system as a whole.
Other parameters (such as assignment of network numbers, port profile, call waiting enable, generation of
metering impulses, level setting, etc.) are port specific for each a/b port.
Parameters indicated as "O" can only be accessed in the operator configuration mode.
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6.6 Global parameters
register
user/
operato
r
*02*XX#
O
*04*X#
O
*05*X#
U
*07*XYZ#
O
*08* XXXXX#
O
*37*X#
U
*43*X#
U
*44*X#
U
*7Y*n…n#
…
*8Y*n…n#
*90*nnnn#
*95*XYZ#
O
O
U
default
TEI assignment:
XX = 0÷63 fixed TEI (point-to-point)
XX = 64 automatic TEI (multi-point)
operating mode (line doubler):
X=0 S bus enabled (NT1+)
X=1 S bus disabled (line doubler)
Incoming call management:
X = 0 broadcast,
X = 1 alternate,
X = 2 a/b 1 preferred,
X = 3 a/b 2 preferred
support mode for supplementary services:
X = 0 CFx stimulus, X = 1 CFx functional,
Y = 1 (fixed)
Z =1 0 is prefixed to the number representation (Calling Number, ServedUserNr,
ForwToNumber) when the Type of Number is “National”. This is used for CLI and other
services
Amount of currency per charging unit. Four digits followed by an additional digit indicating the
number of decimal digits
Internal call:
X=0 disable
X=1 enable
CCBS mode :
X=0 either port only processes own CCBS requests
X=1 either port also processes CCBS originated by other terminals or by the other port
(only significant if the GlobalMode option is used by the network).
Select CLI mode:
X=0 FSK mode
X=1 DTMF mode
Remote configuration numbers. (can only be modified via remote configuration):
n…n: up to 20 digits.
Y = 0 to 9
Remote configuration "called subaddress". Up to 4 digits
Select the ringing pattern associated to each MSN:
X pattern associated to the 1st MSN
Y pattern associated to the 2nd MSN
Z pattern associated to the 3rd MSN
XX=64
0
0
XYZ=111
00000
1
0
0
empty
empty
000
Table A – Global parameters
Note: "U" = user access, "O" operator only access
6.6.1
TEI assignment (register 02)
If the access has a multi-point configuration, the NT1+ must be configured for "automatic TEI
assignment", by assigning the value 64 in the TEI assignment parameter (index 02).
If the access has a point-to-point configuration, the TEI must be programmed with a value ranging from
00 to 63, according to the value of the TEI assigned by the ISDN service provider (usually value 0 is used).
NOTE: when programmed for fixed TEI operation, the "line doubler" operating mode is assumed.
Therefore the S bus is automatically disabled.
6.6.2
Operating mode (register 04)
The NT1+ can be used as described above or simply as a pair gain (line doubler) by deactivating the S bus.
NOTE: when programmed for fixed TEI operation, the "line doubler" operating mode is assumed.
Therefore the S bus is automatically disabled.
6.6.3
Management of Incoming Calls (register 05)
When an incoming call is compatible with both a/b ports (i.e. matching MSN and port profile), four
different options can be specified:
MODE
broadcast
OPERATION
simultaneously offered to both a/b
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alternate
alternatively offered to either a/b 1 or a/b 2 1
a/b 1 preferred
offered to a/b1 (when both ports are free)
2
a/b 2 preferred
offered to a/b2 (when both ports are free)
3
This parameter only applies to calls compatìble with both ports and when both ports are free. As an
example, if port 1 is busy and CW-enabled, then the call will be offered to port 2 independently of the
setting of this parameter and port 1 will receive the CW tones.
The "alternate" or the "a/b x preferred" mode are useful for example if a small analog PABX is connected
to the a/b ports of the NT1+: in this case calls are never routed to both ports but every call is instead
offered to one and only one port, thus simulating the behaviour of a small hunt group.
6.6.4
Support mode for supplementary services (register 07)
This register allows to select:
•
•
whether CF services are implemented using the ETSI functional protocol (1) or the stimulus (0)
protocol
whether a leading 0 is added to the digits in the calling party number i.e. when the type of number is
coded as "national".
6.6.5
Amount of currency per charging unit (register 08)
This parameter contains information required to generate charging pulses when the network provides
currency based charging information. The parameter is comprised of four digits and an additional digit
that specifies the position of the decimal point.
6.6.6
Internal call (register 37)
This parameter is used to enable/disable the internal call and the internal transferring call service:
1 enable (default) 0 disable. This register is managed also by the user.
6.6.7
CCBS operating mode (register 43)
This register defines whether the NT1+ allows a port to:
• only process CCBS requests originated from that same port (value = 0), or
• also process CCBS requests originated by other terminals on the S bus or by the other port (value = 1).
This mode is only significant if the GlobalMode option is used by the network.
6.6.8
CLI operating mode (register 44)
This register configures the CLI service for use of FSK (0) or DTMF (1) signalling.
6.6.9
Remote configuration numbers and subaddress (registers 70 to 89 and 90)
Remote configuration numbers and subaddress are used to recognize remote configuration calls. Up to 20
remote configuration numbers/subaddress pair and one subaddress can be programmed into the NT1+.
These number can only be assigned via remote configuration. Refer to §6.2 for details on use of these
registers.
NOTE: when using DTMF commands, no specific subaddress can be entered (i.e. in the
"number/subaddress" format). This operation can only be carried out using the PC based configuration
program.
6.6.10 Distinctive pattern selection (register 95)
This parameter is used to associate a predefined ringing pattern to each MSN. Distinctive ringing must be
enabled for either a/b port via register 4N position D.
6.7 a/b port Specific Parameters
Separate commands are used for each a/b port: N = 1 holds for the 1st a/b port, N = 2 for the 2nd a/b port.
The value of some port specific parameters contain a sequence of digits. In this case each digit holds the
value of a specific sub-parameter.
When entering a new value, use 9 to skip a digit position without altering the current value of the subparameter.
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It is not necessary to update all digit positions in the port parameters that use multiple digit positions:
e.g. if only digit position 1 and 2 have to be modified, then press # after entering the two digits to
terminate the command.
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*N1*XXX....X#
*N2*XXX....X#
*N3*XXX....X#
U
U
U
*N7*XY#
U
*N8*XYZ#
U
*N9*ABCDEFGHI#
*3N*AANNNN#
U
U
1° MSN (in Line Doubler mode “operator”). Up to 20 digits.
2° MSN. Up to 20 digits.
3° MSN. Up to 20 digits.
POTS register 1 (dialling mode).
X = 0 pulse and tone, 1 tone only
Y = 0 Recall/flash key enabled, 1 disabled
Keypad Control Register.
X= 0~9 (delay in 100ms increments before starting recognition of pulse dialling
after going off-hook. (max recommended value is 3)
Y = 0 (reserved, keep at zero) ;
Z = 0~9 (minimum duration of R key set to [25 + (z*5)] ms).
Port Profile
A = 0 → outgoing only,
A = 1 → speech/audio,
A = 2 → telephony,
A = 3 → gr 2/3 fax
call waiting
B=0 → disabled,
B=1 → type 1 only,
B=2 → both type one and two
generation of metering pulses
C=0 → disabled,
C=1 → enabled
delayed clear back
D=0 → disabled,
D=1 → enabled
select audio levels
E=0 → high levels (0,-7 dBr),
E=1 → low levels (+4,-11 dBr)
CLI on-hook (for standard calls)
F=0 → disabled,
F=1 → enabled
CLI off-hook (for waiting calls)
G=0 → disabled (fixed if the DTMF mode is selected)
G=1 → enabled
reserved
voice or tone to confirm CF and CW services
I = 0 tones
I = 1 voice announcements
FDC register
AA = 00 FDC disactivated
AA = 01..30 delay before starting the FDC call
NNNNNN = target number
reminder ringing for notification of held calls
A=0 disabled, 1 enabled
CLI services activation (this is affected by the *65# keypad sequence)
B=0 deactivated, 1 activated
CW activation (this is affected by the *43# keypad sequence)
C= 0 deactivated, 1 activated
Distinctive Ringing
*4N*ABCDEF#
D=0 deactivated, 1 activated
U
empty
empty
empty
XY = 00
XYZ = 302
1
1
0
1
0
1
0
0
1
00
1
1
1
0
CLIR
E=0 pres. ind. is not included (unless *31# or #31#),
E=1 pres. ind. included and set to restricted (unless #31#)
E=2 pres. ind. included and set to allowed (unless *31#)
E=3 pres. ind included and always set to "restricted"
COLR
F=0 pres. ind. is not included
F=1 pres. ind. included and set to restricted
F=2 pres. ind. included and set to allowed
Delayed Clear forward timer (65 for port 1 and 66 for port 2)
*64+N*X#
*9N*AB#
•
U
X=0 value in seconds (1…120)
Fixed Destination calls
A=0 disabled, 1 enabled
Call Pick-up
B=0 deactivated, 1 activated
0
0
60
0
1
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6.7.1
Registers N9
6.7.1.1 Port Profile
Each a/b port can be set according to the type of analog terminals connected (see § 3.4.1). This settings
use certain signalling features of the ISDN. For example, if the port profile of an a/b port is set to "fax",
then that port will not be offered calls coming from an ISDN phone or another NT1+ a/b ports set as
"telephone".
6.7.1.2 Audio level selection
The NT1+ provides for two sets of reference audio levels for each a/b port. Higher levels meet reference
levels values specified by most network providers and are well suited for modem and fax. Lower levels
guarantee less echo and better acoustic comfort.
6.7.1.3 CLI presentation
Two separate parameters are used to respectively enable the CLID presentation on normal calls (on-hook
transmission) and the CLI on waiting calls (off-hook transmission).
6.7.2
Registers 4N
6.7.2.1 Reminder ringing of held calls
If a call on hold exists when the user goes on-hook and this feature is enabled, the a/b port will ring to
remind the user of the held call.
6.7.2.2 Activation of waiting calls
This parameter is affected by the keypad sequences *43# and #43#. Using this sequences, the user
activated or deactivates reception of CW tones when a call is waiting, or when a compatible call is
received but the relevant a/b port is busy. In order to process waiting call, parameter N9 position 2 must
be set to 1 or 2.
6.7.2.3 Activation of CLI services
This parameter is affected by the keypad sequences *65# and #65#. Using this sequences, the user
activated or deactivates CLI services on incoming calls. In order to generate CLI messages, parameter N9
position 6 (off-hook CLI) and/or 7 (on-hook CLI) must be set to 1.
6.7.3
Delayed clear forward timers (65 and 66)
These registers specify the delayed clear timers respectively for the a/b port 1 (register 65) and the a/b
port 2 (register 66). The default value for the timers is 60 seconds.
6.7.4
Special Service Enables (9N)
This register can only be accessed via local and remote configuration through the PC running the AETHRA
configuration software. It is not intended for the user.
Using this register, the operator can selectively enable the relevant special services (Fixed Destination
Calls, Call Capture)
6.8 Read Commands
ACCESS
* 00 #
* 14 #
* 24 #
* 15 #
* 25 #
* 16 #
* 26 #
* 50 #
* 51 #
* 60 #
* 61 #
* 67 #
* 93 #
* 94 #
* 98 #
announcement
U
hardware and software revision
U
status of ring voltage a/b port 1: 1 = OK, 0 = NOK
U
status of ring voltage a/b port 2: 1 = OK, 0 = NOK
U
read capacity of a/b port 1: range 200 – 5000 nF
U
read capacity of a/b port 2: range 200 – 5000 nF
U
status of a/b port 1: 0 = OK, 1 = NOK
U
status of a/b port 2: 0 = OK, 1 = NOK
U
status of the S bus phantom power supply used in normal power conditions
U
status of the S bus phantom power supply used in restricted power conditions
U
current S bus configuration: 0 = short, 1 = extended (2B1Q only)
U
Emergency mode: 0 = a/b ports, 1 = S BUS
U
current power status: 0 = emergency, 1 = normal
U
read date and time
U
read calling number of the last configuration call
U
reset all user configuration parameters to their default values.
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* 99 #
O
reset all user and operator configuration parameters to their default values
Table B - Direct Commands
6.8.1
Default reset commands
These commands are used to reset all configuration parameters to the factory default values.
NOTE: remote configuration numbers are not affected by these commands.
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7
Installation
7.1 Connections
The followings connections are provided in the back panel:
two modular paralleled RJ-45 with ISO8877 connectors (8p/4c), and, optionally, a four
S0 bus
contact spring terminal block
POTS
two modular RJ-11 connectors (6p/2c), and, optionally two screw terminal block
Line pair (U)
one screw terminal block
7.2 Switches
Two following DIP switches under the removable cover in the front of the unit:
• the S0 bus configuration (short passive / extended)
• a switch to determine power mode when in restricted power conditions (S bus or a/b ports)
• terminating resistors for the S0 bus (off / 50 Ω /100 Ω )
All other settings are made via configuration procedures.
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8
Basic User Procedures – Quick Reference
This chapter describes basic user procedures to deploy some of the most common services provided by
your ISDN access using the NT1+. All user procedures described apply to service activation and use from
devices connected to the a/b ports. For service activation and use from devices connected to the S-bus
(i.e ISDN devices), consult the devices’ manual.
Please refer to the section in this manual referring to configuration procedures, for instructions on how to
configure parameters that relate to enabling some of these services.
Note:
‘R’ refers to the Register Recall or Hook-Flash Key (may be denoted by ‘Flash’ on your analogue device).
8.1 Placing a call
Lift the handset
Wait for the dial tone
Dial the desired number
8.2 Restricting the Caller ID
Lift the handset
Wait for the dial tone, then dial
*
3
1 #
followed by the desired number.
8.3 Handling waiting calls
The user has an active call to B and receives audible tones for a waiting call.
To enable waiting calls
Lift the handset
then dial
*
4
3 #
and replace the handset
To disable waiting calls
Lift the handset
then dial
# 4
3 #
and replace the handset
!
disabling CW tones may be necessary to avoid
interference with operation of modem or fax
devices.
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answering a waiting call
When a call is waiting, tones will be heard. You can ignore the call or (depending on the services provided
by the network and subscribed to by the user):
clear the waiting call
R
0
clear the active call and answer the waiting call
R
1
put the active call on hold and answer the waiting call
R
2
If you go on-hook when a call is waiting, the a/b port will ring.
8.4 Starting a second call
!
This function is only available if the HOLD supplementary service is supported on your
access
During a call:
wait for dial tone
Dial the number for connection B
NOTE: Pressing
A.
before connection to B is completed (busy or no answer) restores the connection to
If the user does not start dialling within a few seconds, then the original call is resumed.
8.5 Handling two simultaneous calls
Once the second call is established, you can:
clear the call on hold
R
0
clear the active call and resume the call on hold
R
1
switch between calls
R
2
start a three party conference
R
3
transfer the call
R
4
8.6 3-party conference
Starting the 3-party conference
when you have one active call to A and one held call to H, press
R then
3
to join A and H into a three party conference.
Handling the conference
release connection to H
R
1
resume private conversation with A (H on hold)
R
2
transfer the call
R
4
release connection to A and retrieve connection to H
R
5
resume private conversation with H (A on hold)
R
6
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8.7 Malicious caller ID
During the active phase of the call or even after the calling user has gone on-hook, press:
then
R
9
8.8 Call Forwarding Unconditional
to activate
Lift the handset
dial
*
2
1
*
enter the number where you want your call to be transferred, then dial
#
a voice announcement or an audible tone will confirm the successful outcome of the request.
Replace the handset.
to deactivate
Lift the handset
dial
# 2
1 #
a voice announcement or an audible tone will confirm the successful outcome of the request.
Replace the handset.
to interrogate the status of the service
Lift the handset
dial
* # 2
1 #
the status of the service and the destination number will be announced.
Replace the handset.
8.9 Call forwarding on calls meeting busy
to activate
Lift the handset
dial
*
6
7
*
enter the number where you want your call to be transferred, then dial
#
a voice announcement or an audible tone will confirm the successful outcome of the request.
Replace the handset.
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to deactivate
Lift the handset
dial
# 6
7 #
a voice announcement or an audible tone will confirm the successful outcome of the request.
Replace the handset.
to interrogate the status of the service
Lift the handset
dial
* # 6
7 #
the status of the service and the destination number will be announced.
Replace the handset.
8.10
Call forwarding on no reply
to activate
Lift the handset
dial
*
6
1
*
enter the number where you want your call to be transferred, then dial
#
a voice announcement or an audible tone will confirm the successful outcome of the request.
Replace the handset.
to deactivate
Lift the handset
dial
# 6
1 #
a voice announcement or an audible tone will confirm the successful outcome of the request.
Replace the handset.
to interrogate the status of the service
Lift the handset
dial
* # 6
1 #
the status of the service and the destination number will be announced.
Replace the handset.
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8.11
Call completion on busy subscriber
If a call meets busy and the CCBS service is available, you will hear a voice message
"press 5 to book the CCBS service"
that invites you to book the service.
Press
5
to book the service or simply go on-hook if you do not want to use the service.
As soon as the called party becomes free, a special ringing pattern will be used to alert you that the call
can be retried. To retry the call, pick up the handset. You do not need to redial as your call will be
automatically forwarded the called number.
You can cancel your booking by pressing
#
3
7
#
You can interrogate on the status of your booking by pressing
*
8.12
#
3
7
#
Internal call
To make an internal call from an ab port to the other ab port
Lift the handset
dial
*
8.13
2 #
Internal transferring call
If an ab port has an active external communication, it is possible to forward the external call to the other
ab port
dial
R
then
*
2
#
Replace the handset.
8.14
Transferring calls between ports
If you want to transfer a call to another port (or to an ISDN phone connected to the S-bus), dial
R
then
*
7
9
#
The call will be suspended.
You can resume the call by going off-hook and dialling:
*
8.15
7
9
#
Activating the Caller's ID service
You must have a display unit suited for the service, either integrated in your phone or as a separate unit.
To activate the service
Lift the handset
then dial
*
6
5 #
and replace the handset
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To disable the service
Lift the handset
then dial
# 6
5 #
and replace the handset
8.16
Incoming call pick-up
To answer a call ringing on a phone connected to the other port
Lift the handset
dial
*
8
2 #
the call will be answered and connected to your phone.
8.17
Fixed Destination Call
to enter the destination number
Lift the handset
dial
* 5 3 *
enter the destination, then dial
#
a voice announcement will confirm the successful outcome of the request.
Replace the handset.
to interrogate the destination number
Lift the handset
dial
* # 5 3 #
the destination number will be announced.
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9
Technical specifications
DIMENSIONS
212 x 160 x 57 mm
WEIGHT
950 gr.
MAINS SUPPLY
230 Vac + 10% - 18% 50 Hz
CONSUMPTION AT NORMAL VOLTAGE
< 120 mA
OPERATING CONDITIONS
ETS 300.019 - 1 - 3 - Cl. 3.2
TRANSPORT
ETS 300.019 - 1 - 2 Cl. 1.2
STORAGE
ETS 300.019 - 1 - 1 Cl. 2.2
U INTERFACE
TS 102 080
S INTERFACE
ETS 300.012
a/b INTERFACE
Q 552
TELEPHONE SYSTEMS
Max 2 terminals
For each terminal:
2 telephones
1 additional ring
9.1
Standard Reference
Physical layer
U reference point
S bus
a/b interfaces (speech)
Signalling
•
Link Layer
•
Basic call Control
•
Generic keypad protocol
•
Generic functional protocol
•
Incoming call management
•
Multiple Subscriber Number (MSN)
•
Terminal Portability (TP)
•
Call Waiting (CW)
•
Calling Line Identification Restriction (CLIR)
•
Connected Line Identification Presentation (COLP)
•
Connected Line Identification Restriction (COLR)
•
Malicious Call Identification (MCID)
•
Closed User Group (CUG)
•
Call Hold (HOLD)
•
Advice of Charge (AOC)
•
Three-Party (3PTY)
•
Diversion supplementary services (CFU, CFNR, CFB)
•
Completion of Calls to Busy Subscriber (CCBS)
•
Explicit Call Transfer (ECT)
•
CLI Services (on-hook)
•
CLI Services (off-hook)
Environmental
•
Safety
•
EMC and protections
•
Transport
•
Storage
•
Operation
TS 102 080 (Ex ETR 080)
ETS 300 012
ITU-T Q.552
ETS 300 125
ETS 300 102-1
EN 300 122-1
EN 300 196-1
ETS 300 082
EN 300 052-1
EN 300 055-1
EN 300 058-1
EN 300 093-1
EN 300 097-1
EN 300 098-1
EN 300 130-1
EN 300 138-1
EN 300 141-1
EN 300 182-1
EN 300 188-1
EN 300 207-1
EN 300 359-1
EN 300 369-1
ETS 300 659-1
ETS 300 659-2
EN 60950
ETS 300 047-5, ETS 300 386-2-2
ETS 300 019-1-1 cl. 1.2
ETS 300 019-1-2 cl. 2.2
ETS 300 019-1-3 cl. 3.2
subjet to change without notice
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Table of Content
1
2
3
4
5
6
Introduction............................................................................................................. 5
1.1
Glossary ............................................................................................................ 5
1.2
Feature Summary................................................................................................. 6
System operation ...................................................................................................... 7
2.1
Power Supply...................................................................................................... 7
2.2
The S0 interface .................................................................................................. 7
2.3
The a/b ports ..................................................................................................... 7
2.4
Supplementary Services ......................................................................................... 7
2.5
Configuration and diagnostic Features........................................................................ 8
ISDN Operation and Signalling Procedures ......................................................................... 9
3.1
Standard NT-1 operation ........................................................................................ 9
3.2
Layer One.......................................................................................................... 9
3.3
Layer Two ......................................................................................................... 9
3.4
Layer 3 ............................................................................................................10
Basic Call Procedures ................................................................................................11
4.1
Timers.............................................................................................................11
4.2
Placing Outgoing Calls ..........................................................................................11
4.3
Accepting Incoming Calls.......................................................................................11
4.4
Clearing Procedures.............................................................................................12
Procedures for supplementary services ...........................................................................13
5.1
Operating supplementary services............................................................................13
5.2
Using the R key ..................................................................................................13
5.3
Service codes ....................................................................................................14
5.4
Multiple Subscriber Numbers (MSN) ..........................................................................14
5.5
Calling Line Identification Presentation (CLIP) .............................................................15
5.6
Call Hold and Retrieve (HOLD) ................................................................................15
5.7
Call Waiting (CW)................................................................................................16
5.8
Restriction of caller's ID (CLIR)................................................................................18
5.9
Connected Line Identification Presentation (COLP) .......................................................19
5.10
Connected Line Identification Restriction (COLR).......................................................19
5.11
Malicious caller ID (MCID) ...................................................................................19
5.12
Terminal Portability..........................................................................................19
5.13
3-Party Conference (3-Pty) .................................................................................20
5.14
Closed User Group ............................................................................................20
5.15
Advice of Charge (AOC)......................................................................................21
5.16
Call Forwarding Services (CF)...............................................................................21
5.17
Call Completion on Busy Subscriber .......................................................................23
5.18
Explicit Call Transfer (ECT) .................................................................................24
5.19
Calling Line ID services ......................................................................................24
5.20
Additional services ...........................................................................................25
Configuration ..........................................................................................................29
6.1
General Information on Configuration Modes...............................................................29
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8
9
6.2
Accepting remote configuration calls ........................................................................29
6.3
Downloading firmware upgrades..............................................................................30
6.4
Tone-based configuration procedures .......................................................................30
6.5
Description of configuration parameters ....................................................................31
6.6
Global parameters ..............................................................................................32
6.7
a/b port Specific Parameters..................................................................................33
6.8
Read Commands .................................................................................................36
Installation .............................................................................................................39
7.1
Connections ......................................................................................................39
7.2
Switches ..........................................................................................................39
Basic User Procedures – Quick Reference .........................................................................41
8.1
Placing a call .....................................................................................................41
8.2
Restricting the Caller ID........................................................................................41
8.3
Handling waiting calls ..........................................................................................41
8.4
Starting a second call...........................................................................................42
8.5
Handling two simultaneous calls ..............................................................................42
8.6
3-party conference..............................................................................................42
8.7
Malicious caller ID ...............................................................................................43
8.8
Call Forwarding Unconditional ................................................................................43
8.9
Call forwarding on calls meeting busy .......................................................................43
8.10
Call forwarding on no reply .................................................................................44
8.11
Call completion on busy subscriber........................................................................45
8.12
Internal call....................................................................................................45
8.13
Internal transferring call ....................................................................................45
8.14
Transferring calls between ports...........................................................................45
8.15
Activating the Caller's ID service ...........................................................................45
8.16
Incoming call pick-up ........................................................................................46
8.17
Fixed Destination Call........................................................................................46
Technical specifications .............................................................................................47
9.1
Standard Reference .............................................................................................47
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