NT-IP
Enhanced ISDN network termination for Internet access
and analogue phones
Internet Access and ISDN
Telephony Service
Network termination for ISDN basic
access with 2 telephone ports and
RS232 interface for fast and reliable
connection to Internet Service Provider,
remote access or e-mail access server
Customer Equipment Preserved
All the advantages of the ISDN network,
without the need to purchase additional
equipment, subscribers can keep using
standard devices like analogue phones,
modems, group 3 fax, automatic
answering machines or micro PBX’s
Always on/Dynamic ISDN
AO/DI allows the user to maintain a
continuous connection and to allocate
the B-Channels dynamically as actually
needed. When a data session is set up
on the D-Channel, up to three
communications channels are available
to the user
Supplementary Services support
Dial-Up Data Services
The NT-IP supports a range of supplementary telephony
services like Call Hold, Call Waiting, Call Forwarding, etc.
based on stimulus procedures and ETSI functional protocols.
Additionally the POTS ports support standard supplementary
services such as the Multiple Subscriber Numbers (MSN), the
Calling Line Identification Presentation (CLIP) and the
Connected Line Identification Presentation (COLP).
A fully digital data service is provided by the NT-IP straight to
the COM port of a PC with unrivalled performance compared
to analogue modems, including sub-second call setup times
and a virtually error free data channel to the service provider at
a guaranteed bit rate. No additional hardware or software need
to be installed to operate the service.
ISDN Services
Subscribers can connect native ISDN terminals, such as
videophones, group 4 fax machines, etc., directly on the Sbus.
Simple Provisioning and Management
The NT-IP fully supports remote monitoring, configuration,
maintenance, and firmware upgrade: operators can therefore
offer their customers a faster maintenance service at a lower
cost by limiting the number of on-site interventions.
NT-IP
Enhanced ISDN network termination for Internet access
and analogue phones
Standard NT1
So Interface
Technical Specifications
• 2-wire interface on the U reference point
• 4-wire user bus on the S/T reference point
On the So interface the NT IP provides the same
quality of service as a standard NT1,
including:
• Full compliance to regulatory standards
• Up to 8 terminals allowed on the S bus
• Complete transparency to the test procedures
from the exchange
Line interface
POTS Interfaces
Electrical:
• PCM speech coder/decoder, according to
G.711, A-law
• Pulse and/or tone dialing, metering
pulse generation
• One port available in emergency conditions
(mains off)
• Local tone generation (dial tone, congestion
and call waiting) is provided when required
• Register recall or hook-flash keys are
also supported to invoke supplementary
services
• To allow operation with a wide range of
terminal, the NT-IP features high on hook
battery voltage and high voltage
ringing even on heavy ringer loads (~3
REN’s)
Additional functions can be provided according
to customer specifications
RS232 PORT
• PPP asynchronous to synchronous
conversion
• Enhanced AT command set
• Handling of control signals (DTR, DSR,
• CTS, etc)
• Implicit rate adaptation via the HDLC framing
• Other major features of the RS-232 port
include:
− Selectable hardware (CTS) or software (Xon, X-off) flow control One directory
number (DN) can be allocated for the
RS232 port
− Internet Access on a single B-channel or
on both B-channels using the multilink
PPP (MP) protocol
− Always on /Dynamic ISDN (AO/DI)
− Bandwidth on Demand (BOD)
− Bandwidth Allocation Protocol and
Bandwidth Allocation Control Protocol
(BAP/BACP)
− Peer to peer communication according to
ITU-T V.120 or V.110 recommendations
− Enhanced AT command
− Automatic bit rate recognition up to 230,4
kb/s
PPP Operation
•
•
•
•
•
•
Single link PPP
Multilink PPP
Call Bumping
Bandwidth On Demand
The Bandwidth Allocation Protocol
Always On/Dynamic ISDN
Line codes
Standard compliance
Power consumption
Range
2B1Q
TS 102 080
max 1.4 W
up to 1k (V remote supply
> 90Vdc)
RS232 port
So Power Supply
Control circuit
Standard PS1 phantom supply to the So bus is
provided when the local a.c. power is
available
Data rate
Access protocol
U Interface
Dialling mode
The NT-IP fully complies to ETS Technical Report
TS 102 080, except for higher power
consumption when emergency power is provided
to the POTS port
POTS interfaces
System Operation
LEDS
The following status monitoring LEDs are located
near the front panel:
PWR
U
DTR
DCD
CTS
TD
RD
B1
B2
A.C. power supplied
Line interface connected
Data Terminal Ready (C108)
Line status or Carrier detect (C109)
Clear to Send (C106)
Transmit Data (C103)
Receive Data (C104)
Channel B1 status
Channel B1 status
Dialling mode
Impedance
Speech quality
No load voltage
d.c. load
Ringing Generator
Ringing Voltage
Ringing load approx.
Frequency
Max distortion
TXD, RXD, RTS, CTS,
DSR, DTR, DCD
up to 230.4 kbit/s
PPP, internal async to sync
converter, V120, V110
Hayes® AT command set
DTMF, pulse
600Ω or complex (optional)
Q.552
< 60 V
from 0 to 800Ω
> 40 V / 2k
3 REN
25 Hz, asymmetrical
10%
Reference Standard for Environmental Quality
Safety
EN60950 (oct. 96)
EMC and protections ETS 300 047, ETS 300
386-2-2
Transport
ETS 300 019-1-1 class 1.2
Storage
ETS 300 019-1-2 class 2.2
Operation
ETS 300 019-1-3 class 3.2
Overvoltages protection exceeds ITU-T K21
Switches
On the bottom side of the device two dip switches
are available to:
select the So bus configuration (short
passive/extended)
include terminating resistors for the So bus (100Ω/
off)
All other settings are made via configuration
procedures
Installation and Configuration
Local and Remote installation and configuration
procedures are available through a DTMF phone
either connected to one of the POTS interfaces or
from a “secured” ISDN access, through a normal
telephone or a PC connected to a NT-IP or an
Aethra TA-INET or TA-IP or Front End
Local and Remote Maintenance
The NT-IP provides a list of diagnostic
features:
• Download of firmware upgrades.
• Remote diagnostics for POTS interfaces.
− ringing voltage
− microphone current
− capacity measurement on the POTS
interfaces
− short circuit control
Mechanical
Dimensions
Weight
180x140x45 mm.
455 gr
Power Supply
Current
Voltage
<100 mA
90÷250 Vac, 50÷60 Hz
Operating System Requirements
Windows 95, 98, 98 SE, ME, 2000, NT4, Linux,
Macintosh
Connections
So bus
POTS
RS232 port
Line pair (U)
Power supply
Two modular RJ-45
ISO8877 connectors
(8p/4c)
Two modular RJ-11
connectors (6p/2c)
2-pole spring terminal
DB-9 connector
2-pole screw terminal or
RJ-45
Plug (external feeder)
071063001GB Rev.1(12/07)