Clear-Com Eclipse HX TEL-14 User Guide

Clear-Com Eclipse HX TEL-14 User Guide
CLEAR-COM ECLIPSE
TEL-14 TWO-CHANNEL TELEPHONE INTERFACE
INSTRUCTION MANUAL
Part Number: 399G278 Rev. A
30 November 2018
Document Reference
Clear-Com HelixNet Partyline User Guide
Part Number: 399G278 Rev A
Legal Disclaimers
Copyright © 2018 HME Clear-Com Ltd.
All rights reserved.
Clear-Com, the Clear-Com logo, and Clear-Com Concert are registered trademarks of HM Electronics, Inc.
The software described in this document is furnished under a license agreement and may be used only in
accordance with the terms of the agreement.
The product described in this document is distributed under licenses restricting its use, copying, distribution, and
decompilation/reverse engineering. No part of this document may be reproduced in any form by any means
without prior written authorization of Clear-Com, an HME Company.
This product is covered by U.S. Patent Nos. 8,311,085 and 8,553,865 and by European Patent No. 2 176 987 B1.
Clear-Com Offices are located in California, USA; Cambridge, UK; Montreal, Canada; and Beijing, China. Specific
addresses and contact information can be found on Clear-Com’s corporate website:
www.clearcom.com
Clear-Com Contacts
Americas and Asia-Pacific Headquarters
California, United States
Tel: +1.510.337.6600
Email: [email protected]
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CONTENTS
OPERATION
1-1
Introduction ..................................................................................................... 1-1
Description ...................................................................................................... 1-2
Operation ........................................................................................................ 1-6
INSTALLATION
2-1
Introduction ..................................................................................................... 2-1
Description ...................................................................................................... 2-2
Wiring ............................................................................................................. 2-3
Setup ............................................................................................................... 2-4
Configuration ................................................................................................ 2-14
MAINTENANCE
3-1
Introduction ..................................................................................................... 3-1
Troubleshooting ..................................................................................................... 3-1
Block Diagram ..................................................................................................... 3-4
SPECIFICATIONS
4-1
LIMITED WARRANTY
5-I
Warranty Period. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5-i
Technical Support . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5-i
Warranty Repairs and Returns ..................................................................... . . 5-ii
Non-Warranty Repairs and Returns ............................................................ . . 5-ii
Extended Warranty ............................................................................................ . . 5-ii
Liability . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5-iii
TEL-14 TWO-CHANNEL TELEPHONE INTERFACE
iii
IMPORTANT SAFETY
INSTRUCTIONS
1.
2.
3.
4.
5.
6.
7.
Please read and follow
these instructions
before operating this
product.
8.
9.
10.
11.
12.
13.
Read these instructions.
Keep these instructions.
Heed all warnings.
Follow all instructions.
Do not use this apparatus near water.
Clean only with dry cloth.
Do not block any ventilation openings. Install in
accordance with the manufacturer’s instructions.
Do not install near any heat sources such as radiators, heat
registers, stoves, or other apparatus (including amplifiers) that
produce heat.
Only use attachments/accessories specified by the manufacturer.
Use only with the cart, stand, tripod, bracket, or table specified
by the manufacturer, or sold with the apparatus. When a cart is
used, use caution when moving the cart/apparatus combination
to avoid injury from tip-over.
Unplug this apparatus during lightning storms or when
unused for long periods of time.
Refer all servicing to qualified service personnel. Servicing is
required when the apparatus has been damaged in any way,
such as power-supply cord or plug is damaged, liquid has been
spilled or objects have fallen into the apparatus, the apparatus
has been exposed to rain or moisture, does not operate normally,
or has been dropped.
WARNING: To reduce the risk of fire or electric shock, do not
expose this product to rain or moisture.
Please familiarize yourself with the safety symbols in Figure 1. When
you see these symbols on this product, they warn you of the potential
danger of electric shock if the station is used improperly. They
also refer you to important operating and maintenance
instructions in the manual.
iv
TEL-14 TWO-CHANNEL TELEPHONE INTERFACE
CAUTION
RISK OF ELECTRIC SHOCK
DO NOT OPEN
This symbol alerts you to the presence of uninsulated
dangerous voltage within the product's enclosure that might
be of sufficient magnitude to constitute a risk of electric
shock. Do not open the product's case.
This symbol informs you that important operating and
main- tenance instructions are included in the literature
accompanying this product.
Figure 1: Safety Symbols
EMC AND SAFETY
The TEL-14 Telephone Interface meets all relevant FCC specifications
set out below:
EN55103-1 Electromagnetic compatibility. Product family standard for
audio, video, audio-visual, and entertainment lighting control
apparatus for professional use. Part 1: Emissions.
EN55103-2 Electromagnetic compatibility. Product family standard for
audio, video, audio-visual, and entertainment lighting control
apparatus for professional use. Part 2: Immunity.
This device complies with Part 15 of the FCC Rules. Operation is
subject to the following two conditions: (1) this device may not
cause harmful interference, and (2) this device must accept any
interference received, including interference that may cause
undesired operation.
TEL-14 TWO-CHANNEL TELEPHONE INTERFACE
v
1
OPERATION
INTRODUCTION
This chapter describes how to use the TEL-14 two-channel autonulling telephone interface. The TEL-14's panel controls and
internal option switches can select any one of a large number of
modes of operation. This chapter describes the five most
common modes:
This chapter describes
the five most common
modes of operation.
• Intercom-station telephone access
• Self-service dial-in
• Manual call screening
• Intercom-to-intercom
• Party-line dial-in
Intercom station operators will normally access telephone lines with
the TEL-14 in the “intercom-station telephone-access” mode.
However, station operators may need to check with their system
operator for further instructions if a
TEL-14 has been configured in a mode not described here.
Technical personnel should refer to Chapter 2, “Installation,” for
details on configuring the TEL-14's internal option switches for each
of these modes (and any others possible).
The next section, “Description,” covers the basic features of the
TEL-14, including its front-panel controls and indicators. The option
switch settings are described for each mode, but they are covered
more thoroughly in Chapter 2. The final sections cover the use of
the TEL-14 in each of the five modes.
Important: When the TEL-14 is first connected to a new telephone
line, its automatic nulling process must be performed before it
can be used. This process consists of calling each line, depressing
the Auto Answer button for 5 seconds, and then waiting several seconds
while the automatic procedure is carried out. It may not be possible to
make outgoing calls on the telephone line until this procedure is
performed. Refer to the Automatic Telephone Line Null section of this
Operation Manual.
Note: Other configurations are possible, in addition to the configurations
described here. However, certain configurations may result in undesirable
crosstalk, as a result of the limitations of the TEL-14's circuitry. For example,
consider a news reporter who calls into the matrix. You would like to provide
the reporter with a program feed, and at the same time route his voice in
through the matrix to a live broadcast. However, the TEL-14 cannot
perfectly isolate his talk from his listen, so some of his outgoing
program feed may leak into his incoming voice.
TEL-14 TWO-CHANNEL TELEPHONE INTERFACE
1- 1
Note: When using the TEL-14 with a speaker station, keep the panel mic gain
low. In
general, keep all gain controls set to a level which is acceptable, but not excessive.
DESCRIPTION
The TEL-14 telephone interface can be installed in an IMF-3 or
IMF-102 interface frame.
Install the TEL-14 in
an interface frame.
See the Interface
Frames Instruction
Manual for more
information.
The TEL-14 allows two standard 2-wire POTS (Plain Old Telephone
Service) telephone lines to be connected to ports in the Eclipse
matrix. The TEL-14 can answer an incoming call automatically ("autoanswer") after either 1 or 4 rings, and it can be configured to send a
call signal whenever it answers a call. The TEL-14 can be configured
to be accessible to intercom station operators, or only to outside
callers.
The front panel features for each telephone line a "ring/off-hook"
LED, a "hook" button, a "send level" LED, a "send volume" control, a
"receive volume" control, an "auto gain adjustable" LED, an "auto
gain" button, an "auto gain fixed" LED, an "auto answer" LED, and
an "auto answer" enable button. For more details see the "Controls
and Indicators" section, below.
The TEL-14 occupies one slot in an interface frame. The TEL-14
provides transformer isolation between each telephone line and the
matrix. The TEL-14 includes a "normally open" relay ("A" and "A1"
contacts) for each line that closes when the line is in use (off hook).
Connections to the matrix are via RJ-45 connectors, and
connections to the telephone line and external relay connections are
via DB-9M connectors. A secondary telephone set may be connected
in series with each TEL-14 line. Clear-Com provides DB-9F to RJ11 adapters (CC# 770025) that allow the use of common RJ-11
telephone jacks and cords.
CONTROLS AND INDICATORS
The front panel features:
• A bicolor "ring/off-hook" status LED
• A "hook" ("line seize") button
•
•
•
•
•
•
•
1- 2
A bi-color "send level" LED
A "send volume" control
A "receive volume" control
An "auto gain" button
"Auto gain" status LEDs
An "auto answer" button
An "auto answer" status LED
TEL-14 TWO-CHANNEL TELEPHONE INTERFACE
"Ring/Off-Hook" LED
The "ring/off-hook" LED flashes red when the telephone line
receives a ring signal. The LED is green while the line is answered
and in use. The LED flickers yellow during the automatic hybrid
nulling process. The LED is off when the line is on-hook and not
ringing.
"Hook" Button
The "hook" button allows a local operator to manually toggle the
TEL-14 line between "on-hook" (telephone line not in use) and "offhook" (line "seized" -- that is, in use) status. If a line is seized at the
interface by the "hook" button, that line cannot be released from an
intercom station, even if the “matrix control” option switch is set. The
line can be released only by either pushing the button again, or by
auto-disconnect (if the auto-disconnect option switches are set).
"Send Level" LED
The bi-color "send level" LED lights green when the audio signal
being sent to the telephone line is at a typical acceptable level. The
LED lights red when the audio output signal level is too high. In
normal operation, the LED should light green during speech and
only flicker red intermittently. The “send volume” control adjusts the
level indicated by this LED.
"Send Volume" Control
The "send volume" control sets the level of the signal that the TEL-14
sends to the telephone line by changing the AGC limiting level. It is
only active when the "auto gain" button is set to “adjustable.” The "send
volume" control has a range of 12 dB. Adjust the "send" control so that
the "send level" LED always lights green with no more than occasional
red flashes.
"Receive Volume" Control
The "receive volume" control sets the level of the signal that the TEL14 receives from the telephone line by changing the AGC limiting
level. It is only active when the "auto gain" button is set to “adjustable.”
The "receive volume" control has a range of 12 dB. While setting the
receive volume, listen to the output from the telephone line in normal
use. Adjust the “receive” control until the telephone receive level is
comparable to the volume level of other intercom listen paths.
"Auto Gain" Button
With the "auto gain" button set to fixed, the TEL-14 adjusts the audio
gain to limit the send and receive telephone line signals to normal
levels. In the fixed mode, the "send volume" and "receive volume"
controls are disabled, but are in effect set to their center positions.
When the "auto gain" button is set to “adjustable,” the TEL-14 adjusts
the audio gain to limit the send and receive telephone line signals to
levels defined by the "send volume" and "receive volume" controls.
The TEL-14 remembers the setting of the "auto gain" button when
power is turned off.
TEL-14 TWO-CHANNEL TELEPHONE INTERFACE
1- 3
"Auto Gain" Status LEDs
These green and yellow LEDs indicate the currently selected “auto
gain” mode. The yellow LED indicates that the “adjustable” mode is
selected and the green LED indicates that the “fixed” mode is selected.
Refer to the previous paragraph for an explanation of these modes.
"Auto Answer" Button
The front-panel “auto answer” button allows the local user to enable or
disable the TEL-14's auto answering mode. The “auto answer”
function, in conjunction with the “auto disconnect” function, allows a
TEL-14 to automatically service incoming calls. An outside caller can
automatically be connected to any matrix audio connection that has
been pre-assigned from the Eclipse Configuration System, such as a
party line or an IFB program feed.
Auto answer is enabled by using the "auto answer" button to turn ON
the auto answer indicator LED. The interface will then automatically
answer incoming calls after either 1 or 4 rings, as set by the "ring
count" option switch. The TEL-14 remembers the setting of the "auto
answer" button when power is turned off.
The “auto-answer” button can be overridden by the Eclipse matrix to
allow the TEL-14 to auto-answer without the auto-answer button
being set to enable.
This will occur when a TEL-14 is configured in ECS to use Passcodes
set up in the System Preferences “System Access Codes” tab as DTMF
Passcodes. The use of DTMF passcodes is configured in Matrix
Hardware under Advanced Settings and DTMF Settings as “Enable
Passwords”.
Once a line is auto answered, it can only be released by auto
disconnect, by the "hook" button, or from a matrix station that has
"remote telephone-line release" enabled. Auto disconnect releases
the line when a dial tone, busy tone, reorder tone, or loop current
interruption appears on the line (if not disabled by the autodisconnect option switches). The line cannot be released by
deactivating any or all talk or listen paths from the intercom
stations to the TEL-14. Flash hook signals from the matrix will also
have no effect. This prevents intercom station operators from
disconnecting the telephone line when it is in automatic use by
outside callers, or in manual use by an intercom station operator
who has access to the "hook" button.
The "auto answer" button can also be used to initiate an
automatic nulling sequence. Refer to the following section.
"Auto Answer" Status LED
This green LED indicates the currently selected “auto answer” mode.
If it is lit, the TEL-14 will automatically answer telephone calls. If it is
not lit, incoming telephone calls can only be answered manually.
Refer to the previous paragraph for further explanation of “auto
answer” mode.
1- 4
TEL-14 TWO-CHANNEL TELEPHONE INTERFACE
AUTOMATIC TELEPHONE LINE NULL
The TEL-14 features sophisticated automatic nulling circuitry, in addition
to its integral echo cancellation system. This nulling capability is in two
parts:
• The initial telephone line hybrid null is to be performed the first
time a telephone line is connected to the TEL-14 or whenever a
different telephone line is connected. This process is automatic,
but must be initiated by the user. The way to do this is described
later in this section.
• The continuous dynamic voice null takes place during each
telephone call. It automatically "fine tunes" the null and cancels
echoes.
The TEL-14 must null itself to the telephone line before normal
operation is optimal. This procedure is to be performed once
whenever the TEL-14 is connected to a different telephone line.
Once this nulling procedure is performed, the TEL-14 will remember
the telephone line characteristics when it is removed from the frame
or loses power. It is necessary to null (minimize) the sidetone (the
sound of the operator's own voice in his or her headset) when an
external telephone line is placed in an intercom environment. Ideally,
there should be no portion of the talk signal in the listen signal. The
TEL-14's sidetone nulling procedure is described here.
Before calling the TEL-14 to automatically null it, connect the external
telephone line and any other devices that affect the line's impedance.
These include other telephone extensions connected in parallel on
the same line. The phone line must be active (turned on at the
central telephone office) during the nulling process, and all local
parallel phone sets must be plugged in but on-hook so the line is in
its normal operating state.
1. Enable the "auto answer" function using the front panel button.
2. Call the TEL-14 interface from a standard telephone set or cellular
phone. Do not call the TEL-14 from another TEL-14 in an
intercom.
3. Press and hold the "auto answer" button for 5 seconds. The
green "auto answer on" LED will turn off and then turn on again
after 5 seconds. When this happens, release the "auto answer"
button.
4. Maintain silence on the telephone line. The TEL-14 will listen for
one second of silence before beginning. The "ring/off-hook" LED
will then flicker yellow and a series of tones will appear on the
telephone line. These tones will be heard on the telephone line,
but not on the intercom. Maintain silence during this process.
5. At the conclusion of the tones, the automatic nulling process is complete.
After this initial automatic nulling adjustment has been made, the
TEL-14 will remain adapted to this telephone line. There will be no
white noise or tones at the beginning of each call, but instead the
TEL-14 will use voices to dynamically adapt the interface to account
for any residual nulling which may be needed.
Typically, the TEL-14 will have adapted within 5 seconds of the start
of the call. Before it has adapted, voices may temporarily sound
hollow. This effect is normal, but may be minimized by reducing the
send and/or receive volume settings. Throughout the call the TEL-14
will continue to perform continuous, automatic echo cancellation and
adaptation to acoustic changes.
TEL-14 TWO-CHANNEL TELEPHONE INTERFACE
1- 5
The above initial automatic nulling process should not need to be
repeated, unless the telephone line connection is changed to a
different telephone number or if there is reason to believe the
telephone line impedance has changed significantly--for example, if
echoing or feedback occurs at a lower volume setting than before.
OPERATION
This section describes the operation of the TEL-14 in each of the
following modes:
•
•
•
•
•
Intercom-station telephone access
Self-service dial-in
Manual call screening
Intercom-to-intercom
Party-line dial-in
INTERCOM-STATION TELEPHONE-ACCESS
MODE
In “intercom-station telephone-access” mode, a call on a TEL-14 line
can be answered by any intercom station with a selector key
assigned to a TEL-14 port label. Intercom stations can originate a call
by using the "dial phone" mode.
If the call must originate at another station model, then this station
must have a key programmed to activate a DTMF sequence.
Another way to arrange this is for the operator to have access to a
standard telephone set connected with the TEL-14 line (for further
information, see "Manual Call Screening Operation" below).
The default settings of the TEL-14 allow “station access” mode.
If the “immediate manual disconnect” feature is disabled, there will be
a period of 15 seconds between the time when you deactivate the
path to the TEL-14 port and the time when the TEL-14 hangs up the
line. This gives you time to transfer the call to another station, or to
recover an accidental deactivation of the path to the TEL-14 without
losing the call.
If your station is on the "preset call signal list" for the TEL-14 port,
you will automatically receive a call signal whenever the TEL-14
answers an incoming telephone call. The call signal will continue
for as long as the line is ringing.
SELF-SERVICE DIAL-IN MODE
In “self-service dial-in” mode, also referred to as "telephone IFB" mode,
the TEL-14 will answer automatically whenever outside callers dial in.
The caller will be automatically connected to a preset party-line,
station, or program feed.
Auto-disconnect will release the line automatically after the caller
hangs up. This mode can also be used to implement "direct inward
access" and "dial-up IFB". This mode is normally configured to
"prevent stations from calling out" to leave the line available for dialin use only. If you are calling from an outside line in “self-service dialin” mode, the audio paths are normally preset and available as soon
as the TEL-14 answers your call. The TEL-14 will answer your call
after either 1 or 4 rings, depending on how you configure it.
1- 6
TEL-14 TWO-CHANNEL TELEPHONE INTERFACE
If you are calling in on a "direct inward access" line with no preset
audio paths, you may need to enter passwords, selector codes,
and/or control codes to activate audio paths.
Note: When you call a TEL-14 with access prompt enabled if you then go
on-hook during or just after the Access Prompt is heard then the TEL-14 will
remain off-hook. If the incoming caller waits about a second after the access
prompt is heard before going on-hook then the TEL-14 will clear the call
and go on-hook.
Without an access prompt then if the caller goes on-hook within 2 seconds
of the last answering beep (or during the answering beeps) the TEL-14
stays off-hook
MANUAL CALL-SCREENING MODE
In “manual call-screening” mode, incoming calls can be answered by a
"master" operator with physical access to the TEL-14 "hook" button.
A standard telephone, wired in series with the TEL-14, is used to
initially pick up the call. When the telephone has been wired in series
with the TEL-14, picking it up will not cause the interface to go offhook, nor will this interfere with a call already in progress.
Once the master station operator determines which station should
receive the incoming telephone call, he calls that station and
informs them that a call is waiting. The operator then presses the
"hook" button on the TEL-14, bringing it off-hook, disconnecting the
telephone set, and making the incoming telephone call available to
any station that has the TEL-14 assigned to a key. The destination
then accesses the call by activating the listen or talk key to the
TEL-14. Once the Hook button has been activated, the operator hangs
up the standard telephone.
When the call is complete, the destination station operator can
inform the master operator, and the master operator can hang up
the TEL-14 using the "hook" button. If the "auto-disconnect" option
switches are set, the TEL-14 will release the telephone line
automatically when the caller hangs up. The telephone line will not
be released if the talk path to the TEL-14 port is deactivated. This
prevents a station operator from inadvertently disconnecting an inbound caller. The destination station operator can also use the
“remote telephone-line release” feature to hang up the phone.
The operator can also originate outside calls on the standard
telephone, and make them available to destinations within the
matrix.
INTERCOM-TO-INTERCOM MODE
The TEL-14 may be used to connect two remotely located
intercom systems through a telephone line. To set up the
connection, one TEL-14 must originate a call to the other. An
intercom station equipped with a keypad can originate the call by
using the station's "dial phone" mode. If the operator of a station
not equipped with a keypad must originate the call, either he or she
must have a key programmed to activate a DTMF sequence.
After the call is made, the distant TEL-14 goes off-hook and the
incoming telephone call becomes available to the telephone keys
the TEL-14 port is preset to.
TEL-14 TWO-CHANNEL TELEPHONE INTERFACE
1- 7
PARTY LINE DIAL-IN MODE
Two TEL-14 lines may be programmed into the same party line. "Auto
answer" should be enabled to allow people to call and automatically
connect into the party line. The callers may then communicate with
each other, as well as anyone on the party line. When a caller
disconnects, the TEL-14 line will automatically disconnect after a
short time, depending upon the response time of the telephone
central office.
Note: When a TEL-14 is connected to an Eclipse system it will operate
automatically in auto-answer mode even if Auto-Answer is not enabled on
the TEL-14 hardware using the auto-answer button. This is to allow
callers to enter a PIN code after dialling in before being connected to the
system. See the Eclipse Configuration System manual for information on
PIN codes for external callers.
1- 8
TEL-14 TWO-CHANNEL TELEPHONE INTERFACE
2
INSTALLATION
INTRODUCTION
This chapter describes the TEL-14 two-channel auto-nulling
telephone interface and its installation in the matrix, including
setting internal option switches, wiring to external devices,
operation of the front panel controls and indicators, and electrical
and mechanical specifications. The following subjects are covered in
this chapter:
• Description
• Installation in an interface frame
• Wiring
• Setup
• Configuration
The TEL-14's panel controls and internal option switches can select
any one of a large number of modes of operation for the TEL-14. For
this reason, this section describes each option switch individually,
and then describes the installation settings for five of the TEL-14's
most common modes:
•
•
•
•
Intercom-station telephone access
Self-service dial-in
Manual call screening
Intercom-to-intercom
• Party line dial-in
Note: Other configurations are possible, in addition to the
configurations described here. However, certain configurations may
result in undesirable crosstalk, as a result of the limitations of the TEL-14's
circuitry. For example, consider a news reporter who calls into the matrix.
You would like to provide the reporter with a program feed, and at the
same time route his voice in through the matrix to a live broadcast. However,
the TEL-14 cannot perfectly isolate his talk from his listen, so some
of his outgoing program feed may leak into his incoming voice.
Note: When using the TEL-14 with a speaker station, keep the panel mic gain
low. In
general, keep all gain controls set to a level which is acceptable, but not excessive.
Warning: The TEL-14 works with POTS (Plain Old Telephone Service) Central
Office
(CO) lines. Analog station lines from some PABXs are not compatible.
TEL-14 TWO-CHANNEL TELEPHONE INTERFACE
2- 1
DESCRIPTION
The TEL-14 allows two standard loop start POTS (Plain Old
Telephone Service) lines to connect to ports in the Eclipse matrix.
The TEL-14 dual telephone interface is installed in an interface
frame.
The following functions are available for each line:
• Front panel indication of "ring" and "off-hook" with a single bi-color LED.
• Front panel mounted manual "hook" switch button for manual
operation of the interface. The "hook" switch function can also
be controlled from the matrix port the line is assigned to.
• Front panel indication of "send level" with a single bi-color LED.
• Front panel "send volume" and "receive volume" controls are provided.
• An "auto gain" button selects whether the automatic gain control
limit is fixed to a normal level or adjustable to other levels. The
setting of this button is retained when the TEL-14 is removed from
the frame or powered down.
• Auto-answer of incoming calls is a front panel button selection.
An option switch selects answering each call after 1 or 4 rings.
The setting of the front panel button is retained when the TEL-14
is removed from the frame or powered down.
• Front panel control for commanding automatic renulling of the
telephone line hybrid.
• Automatic echo suppression DSP.
• Transformer isolation between the telephone line and intercom.
• Occupies a single slot in the interface frame.
• Relay contacts are available to indicate externally an "off-hook"
condition on each line ("A/A1" leads).
INSTALLATION IN AN INTERFACE FRAME
The TEL-14 module can be installed in any available slot in an interface frame.
To install the TEL-14 interface module:
1. Select a slot to install the interface in.
2. Remove the blank plate covering the slot.
3. Set the option switches for the desired mode of operation.
4. Install the TEL-14 in the slot and make sure the card is fully seated.
5. Tighten the TEL-14 assembly's front panel mounting screws.
2- 2
TEL-14 TWO-CHANNEL TELEPHONE INTERFACE
WIRING
TEL-14 INTERFACE WIRING FOR AN IMF-3
INTERFACE FRAME
The TEL-14 line A circuit is connected to the matrix through the RJ45 connector on the interface rear-panel assembly that the TEL-14 is
connected to. The DB-9M connector immediately adjacent to the RJ45 is used to connect to the telephone line. Similarly, the second RJ45 and DB-9M connectors connect the TEL-14 Line B circuit. ClearCom provides DB-9F to RJ-11 adapters (CC# 770025) that allow the
use of common RJ-11 telephone jacks and cords.
Warning: The TEL-14 works with POTS (Plain Old Telephone Service)
CO (Central Office) lines. Analog station lines in some
PABXs are not compatible.
Internal Settings and Adjustments
For internal option switch settings and adjustments, refer to the
“Setup” section in this chapter.
Connection To The Telephone Line
Connecting the telephone line can be accomplished with two
methods. One is to use the RJ-11 to DB-9M adapters supplied by
Clear-Com (CC#770025) with the TEL-14 interface. The second
method is to directly wire each telephone line to a DB-9 connector
using the pinouts in Figure 2-1.
Note the Clear-Com #770020 adapter, which may be alternately
supplied, does not have the wiring to pins 1 and 6 of the RJ-11
connector. If it is necessary to use a series-connected telephone set
with the TEL-14, contact the Service Department to obtain a
CC#770025 adapter instead. Figure 2-1 shows the wiring diagram
of the adapter for one line.
RJ-11 TO DB-9F ADAPTER
Clear-Com Part # 770025
RJ-11 to
Telephone Line
PHONE (BLU)
RELAY (YEL)
LINE (GRN)
LINE (RED)
RELAY (BLK)
PHONE (GRA)
DB-9F to
TEL-14
1
6
2
1
2
3
4
5
6
7
3
8
4
9
5
LINE
PHONE
LINE
RELAY
RELAY
PHONE
Figure 2-1: RJ-11 to DB-9 Adapter for TEL-14 Interface
The phone line must be an outside (POTS) line directly connected to
the telephone company central office, and isolated from in-house
phone systems. A standard telephone can be installed in parallel with
this line if desired, but it should not be used while the TEL-14 is
offhook. When the TEL-14 is automatically adjusting its sidetone null,
all additional standard telephones must be "on-hook".
TEL-14 TWO-CHANNEL TELEPHONE INTERFACE
2- 3
It is preferable to use a series-connected telephone set with the TEL14. This will prevent the impedance of the telephone set from
disturbing the telephone line impedance recognized by the TEL-14. It
will also allow the TEL-14 to automatically disconnect the telephone
when it comes offhook. A standard telephone may be installed in
series with the TEL-14 by connecting it to pins 1 and 6 of the RJ-11
jack. Refer to Figure 2-2 for a diagram showing one way to connect
the TEL-14 in series with a telephone.
Telephone
Central
Office Line
Modular Duplex Surface Jack
Graybar Part # AT444 or AT666
4 3
Modular Line Cords
1
6
Graybar Part # AT407
RJ-11 TO DB-9F ADAPTER
Clear-Com Part # 770025
Modular Line Cord
Graybar Part # AT507
25
Relay
Contacts
Telephone
Set
2- 4
TEL-14 TWO-CHANNEL TELEPHONE INTERFACE
RELAY CONTACTS
A pair of relay contacts for each line ("A/A1 leads") rated at 2A @ 24
VAC are available on the DB-9M connector or the RJ-11 adapter.
This pair of contacts is normally open when the line is "on-hook"
and closes when the TEL-14 goes "off-hook.” These contacts are
not connected to any other circuitry inside the TEL-14 and can be
used to energize a line-in-use indicator light on a standard multi-line
phone set, or for any other low-power application.
SETUP
AUTOMATIC TELEPHONE LINE NULL
The TEL-14 features sophisticated automatic nulling circuitry, in addition
to its integral echo cancellation system. This nulling capability is in two
parts:
• The initial telephone line hybrid null is performed the first time a
telephone line is connected to the TEL-14 or whenever a
different telephone line is connected. This process is automatic,
but must be initiated by the user. The way to do this is described
later in this section and in Chapter 1, “Operation.”
• The continuous dynamic voice null takes place during each
telephone call. It automatically "fine tunes" the null and cancels
echoes.
The TEL-14 must null itself to the telephone line before normal
operation is optimal. This procedure is to be performed once
whenever the TEL-14 isconnected to a different telephone line.
Once this nulling procedure is performed, the TEL-14 will
remember the telephone line characteristics when it is removed
from the frame or loses power. It is necessary to null (minimize) the
sidetone (the sound of the operator's own voice in his or her
headset) when an external telephone line is placed in an intercom
environment. Ideally, there should be no portion of the talk signal in
the listen signal.
TEL-14'S SIDETONE NULLING PROCEDURE
Before calling the TEL-14 to automatically null it, connect the external
telephone line and any other devices that affect the line's impedance.
These include other telephone extensions connected in parallel on
the same line. The phone line must be active (turned on at the
central telephone office) during the nulling process, and all local
parallel phone sets must be plugged in but on-hook so the line is in
its normal operating state.
1. Enable the "auto answer" function using the front panel button.
2. Call the TEL-14 interface from a standard telephone set or cellular
phone. Do not call the TEL-14 from another TEL-14 in an
intercom.
3. Press and hold the "auto answer" button for 5 seconds. The
green "auto answer on" LED will turn off and then turn on again
after 5 seconds. When this happens, release the "auto
answer" button.
4. Maintain silence on the telephone line. The TEL-14 will listen for
one second of silence before beginning. The "ring/of- hook" LED
will then flicker yellow and a series of tones will appear on the
TEL-14 TWO-CHANNEL TELEPHONE INTERFACE
2- 5
telephone line. These tones will be heard on the telephone line,
but not on the intercom. Maintain silence during this process.
5. At the conclusion of the tones, the automatic nulling process is complete.
After this initial automatic nulling adjustment has been made, the
TEL-14 will remain adapted to this telephone line. There will be no
white noise or tones at the beginning of each call, but instead the
TEL-14 will use voices to dynamically adapt the interface to account
for any residual nulling which may be needed.
Typically, the TEL-14 will have adapted within 5 seconds of the start
of the call. Before it has adapted, voices may temporarily sound
hollow. This effect is normal, but may be minimized by reducing the
send and/or receive volume settings. Throughout the call the TEL-14
will continue to perform continuous, automatic echo cancellation and
adaptation to acoustic changes.
The above initial automatic nulling process should not need to be
repeated, unless the telephone line connection is changed to a
different telephone number or if there is reason to believe the
telephone line impedance has changed significantly--for example, if
echoing or feedback occurs at a lower volume setting than before.
If an almost complete null cannot be obtained, it is likely
something is wrong either with the wiring in the telephone line, or
with one or more of the other devices attached to the telephone
line. Refer to the “Option Switch” section of this manual for ways to
use the TEL-14 options to improve its ability to adapt to poor
conditions. Note that the null circuits in the TEL-14 are designed in
accordance with North American standards, and require the signal
levels and impedance of the line be within these standards. The
length of the telephone line between the TEL-14 and the Central
Telephone Office should not be excessively long.
OPTION SWITCH SETTINGS
The TEL-14's panel controls and internal option switches can select
any one of a large number of modes of operation for the TEL-14. The
following subjects are covered in the following paragraphs:
•
•
•
•
Default option switch settings
Matrix compatibility
Individual option switch descriptions
Option switch settings for 5 typical modes of operation
Default Option Switch Settings
Figure 2-3 shows the option switches for each line in their factory set
positions. The option switches are located on the lower edge of the
Line A and B circuit boards, respectively, behind the auto answer
buttons. The factory set position for each switch is the ON position,
which is in the direction of the card edge for each line.
The option switch position numbers (1-8) are silkscreened on the
circuit board. Follow these position numbers rather than any which may
appear on the switches. The factory set positions (all ON except for
S7-2 and S7-4 which are off ) are correct for the typical application of
receiving calls from standard telephone sets or cellular phones. You
may change the switch settings based upon their individual
descriptions on the following pages, or upon one of the applications
described.
2- 6
TEL-14 TWO-CHANNEL TELEPHONE INTERFACE
The TEL-14 must be unplugged from the frame to access the option
switches. The TEL-14 may be removed and inserted with the
frame powered. With the exception of the normal/test mode switch
and matrix identification switches, which are not used on Line B,
the Line A and Line B switch numbering is identical. The TEL-14
will retain its telephone line settings while it is unplugged, so it is
important to plug it back into the same slot.
Line A
Line B
S7
S7
On
4
1
Disconnect Tone Selection
1
4
S6
S6
On
87654321
On
On
11
4
Off
Off
Off
Off
Off
Off
Short
8
Ring Count
Sense Dial Tone
Sense Busy Tone
Sense Reorder Tone
Sense Loop Current Interruption
Immediate Manual Disconnect
Splash Tones
Loop Current Interruption Guard Time
On
On
On
On
On
On
On
On
Off
Off
Off
Off
Off
Off
Off
Off
S1
On Off
12345678
On
On
On
On
On
On
Normal
21
On
Edge of the Circuit Board
S1
Off
Receive Supp Disable
Intercom Echo Cancel
Telephone Echo Cancel
DTMF Dial Guard Time
MTX2 V12 or MTX3
Matrix Control
HDX Disable
Normal / Test Mode*
Spare
12345678
8
On
On
On
On
On
On
Normal
87654321
On Off
1 On
Edge of the Circuit Board
Off
Off
Off
Off
Off
Off
Off
Off
Test
Off
1234
4321
Off On
1
On
On
On
On
On
On
Normal
4
Off
Off
Off
Off
Off
Off
Short
S5
Off On
1
2
MTX3 Identification A
MTX3 Identification B
Line B
Line A
Off
Off
Front Panel End
TEL-14 TWO-CHANNEL TELEPHONE INTERFACE
Factory Default: All Switches ON
except S7-2 & S7-4 which are OFF
Front Panel End
2- 7
Matrix Compatibility Option Switches
The TEL-14 is compatible with Matrix Plus II, Matrix Plus 3, and
Eclipse intercom systems, although the option switches must be set
for each system as follows:
Switches S5-1 and S5-2: Set the Matrix Identification option switches S5-1
and S5-2 to ON if you have a Matrix Plus 3 or Eclipse intercom system or to
OFF if you have a Matrix Plus II intercom system. The factory default
position is ON.
Switch S6-5: If you have a Matrix Plus II intercom system with software
older than revision 12.x, set the Matrix Control option switch (S6-5) to
OFF.
Individual Option Switch Descriptions and Settings
Note: The default position for each option switch is the ON position
(except for S7-2 and S7-4 which are OFF). The ON position of each
switch is set in the direction of the edge of the circuit board on both
the Line A and Line B circuit boards. Leave each switch in the
default position unless there is a specific reason to change it.
Switch S6-1 Receive Suppression Disable: It is generally advantageous to
suppress incoming noise from the telephone line when the distant party is
not speaking. However, some users may want to leave the incoming sound
on when the distant party is not speaking. This will enhance the sense
that someone is on the other end of the telephone line, especially when
intercom headsets are used. However, if two TEL-14 lines were connected into
the same party line, it would be advantageous to set Receive Suppression
Disable to the OFF position. This prevents noise from one or more
telephone lines from interfering with intercom communication and
improves the stability of the connection. Refer to the “Party Line Dial-In
Mode” section of this chapter. To leave the telephone line audio
connected when the distant party is not speaking, set option switch S6-1
to ON. To mute the telephone line audio when the distant party is not
speaking, set option switch S6-1 to OFF. The factory default setting is ON,
causing Receive Suppression to be disabled.
Switch S6-2 Intercom Echo Cancellation: Depending upon the system
configuration and room acoustics, audio communications may be improved
by turning off the automatic intercom echo cancellation. Refer to the
“Intercom-to-Intercom Mode” section of this chapter. Normally, however,
leaving the automatic echo cancellation turned ON results in the best
communications. To enable automatic intercom echo cancellation, set option
switch S6-2 to ON. To disable automatic intercom echo cancellation, set
option switch S6-2 to OFF. The factory default setting is ON, causing
automatic
intercom echo cancellation to be enabled.
Switch S6-3 Telephone Echo Cancellation: Depending upon the system
configuration and telephone line conditions, audio communications may be
improved by turning off the automatic telephone echo cancellation.
Refer to the “Intercom-to-Intercom Mode” section of this chapter.
Normally, however, leaving the automatic echo cancellation urned ON
results in the best communications. To enable automatic telephone
2- 8
TEL-14 TWO-CHANNEL TELEPHONE INTERFACE
echo cancellation, set option switch S6-3 to ON. To disable automatic
telephone echo cancellation, set option switch S6-3 to OFF. The
factory default setting is ON, causing automatic
telephone echo cancellation to be enabled.
Switch S6-4 DTMF Dial Guard Time: At the start of a call when the
TEL-14 goes off hook the Echo Cancellation is frozen and the
Receive Gain is reduced to allow distortion free DTMF dialling. With
S6-4 set to its factory default position ON the DTMF Dial Guard
Time is 4 seconds. With the S6-4 set to the optional position OFF
the DTMF Dial Guard Time is extended to 10.2 seconds.
Switch S6-5 Software Compatibility: The Software Compatibility switch
enables the TEL-14 to be backwards-compatible with Matrix Plus II
software, revisions 10 and 11. When the TEL-14 is shipped as part of
a system, this switch is set at the factory to match that system's
software revision. If the TEL-14 is shipped individually, this switch is
set to ON (compatible with Matrix Plus II, revisions 12 or higher, or
with Matrix Plus 3). If the TEL-14 is to be installed in a Matrix Plus II
system running revisions 10 or 11, you must set this switch to OFF.
Switch S6-6 Matrix Control: Note: This switch is normally only used in
MatrixPlus II intercom systems using revision 11 software or earlier. In
later releases,this function is controlled by the "Prevent Stations From
Calling Out" option in the "Configure - Local Preferences" screen for
the telephone port.
When Matrix Control is enabled, a telephone call can be initiated
by any intercom station that has a TEL-14 port label assigned to a
selector key. Matrix Control enables the station to activate talk paths
to the TEL-14, which will cause the TEL-14 to seize the line. The
station can also pick up a call on the TEL-14 line.
When Matrix Control is disabled, stations cannot initiate telephone
calls, and can only talk on the telephone line after the line has
already been seized by the TEL-14. This may be desirable if the
interface line is dedicated to manual operation, or to answering
incoming calls automatically.
Matrix Control will be automatically disabled if:
• The telephone line is automatically answered at the interface.
• The telephone line is manually seized at the interface by pushing
the "Hook" button.
To enable Matrix Control, set option switch S6-6 to ON.
Switch S6-7 Half-Duplex Disable: In extreme conditions involving very
poor telephone lines or conditions that cause instability and echo,
acceptable performance can be obtained by enabling automatic switching to
half-duplex conversation. In this mode the DSP controlling the echo
canceling will automatically determine whether full-duplex or half duplex
will result in better
operation. To restrict operation to full-duplex, set option switch S6-7
to ON. To allow half- or full-duplex modes to be automatically
determined, set option switch S6-7 to OFF. The factory default setting
is ON, restricting operation to full-duplex.
Switch S6-8 Normal / Test Mode: This switch is only active on the Line
A card, but serves both lines. Switch S6-8 should normally be left ON,
enabling Normal Mode.
Switch S1-1 Auto Answer Ring Count: The Auto Answer Ring Count
determines the number of times the telephone line must ring before
TEL-14 TWO-CHANNEL TELEPHONE INTERFACE
2- 9
the TEL-14 automatically answers it. The ring count can be set to
either 1 ring or 4 rings. To set the Auto Answer Ring Count to 1 ring,
set option switch S1-1 to ON. To set the Auto-Answer Ring Count to 4
rings, set option switch S1-1 to OFF. The factory default setting is
ON, providing an Auto Answer Ring Count of 1.
Switch S1-2 Sense Dial Tone: The TEL-14 can automatically
disconnect from the telephone line when it senses dial tone. If
necessary, this capability can be disabled. To enable automatic
disconnects resulting from dial tone, set option switch S1-2 to ON.
Dial tone disconnects are automatically disabled for the first 10
seconds of outgoing calls to allow time to begin dialing, regardless of
this switch setting. To disable automatic disconnects resulting from
dial tone, set option switch S1-2 to OFF. The factory default setting is
ON, providing an automatic disconnect when the TEL-14 senses dial
tone.
Switch S1-3 Sense Busy Tone: The TEL-14 can automatically
disconnect from the telephone line when it senses busy tone. If
necessary, this capability can be disabled. To enable automatic
disconnects resulting from busy tone, set option switch S1-4 to ON.
To disable automatic disconnects resulting from busy tone, set
option switch S1-4 to OFF. The factory default setting is ON,
providing an automatic disconnect when the TEL-14 senses busy
tone.
Switch S1-4 Sense Reorder Tone: The TEL-14 can automatically
disconnect from the telephone line when it senses reorder (fast
busy) tone. If necessary, this capability can be disabled. To enable
automatic disconnects resulting from reorder tone, set option switch
S1-4 to ON. To disable automatic disconnects resulting from reorder
tone, set option switch S1-4 to OFF. The factory default setting is
ON, providing an automatic disconnect when the TEL-14 senses
reorder tone.
Switch S1-5 Sense Loop Current Interruption: The TEL-14 can
automatically disconnect from the telephone line when it senses the
interruption in loop current that happens on most telephone lines
shortly after the distant caller disconnects. If necessary, this
capability can be disabled. To enable automatic disconnects resulting
from an interruption in loop current, set option switch S1-5 to ON. To
disable automatic disconnects resulting from interruption in loop
current, set option switch S1-5 to OFF. The factory default setting is
ON, providing an automatic disconnect when the TEL-14 senses an
interruption in loop current.
Switch S1-6 Immediate Manual Disconnect: The TEL-14 can
immediately disconnect a telephone call when the last station
connected to it releases. Sometimes it is useful to delay
disconnecting the telephone line when a station releases it. This
allows the same or another station to pick up the line again and
avoid losing the caller. The TEL-14 can automatically delay manual
disconnects for 15 seconds. To enable immediate manual
disconnects, set option switch S1-6 to ON. To delay manual
disconnects, set option switch S1-6 to OFF. The factory default
setting is ON, providing an immediate manual disconnect.
Switch S1-7 Splash Tones: Using "Splash Tones" the TEL-14 provides
an indication to the caller that the call has been answered and
provides an indication to the intercom that a caller is connecting.
Depending upon requirements, these tones may be disabled. To
enable splash tones, set option switch S1-7 to ON. To disable
splash tones, set option switch S1-7 to OFF. The factory default
setting is ON, providing splash tones at the start of each call.
2- 10
TEL-14 TWO-CHANNEL TELEPHONE INTERFACE
Switch S1-8 Guard Time: In the first few seconds after the TEL-14 answers
an incoming call, the telephone system may produce momentary
interruptions in the current feeding the TEL-14. These interruptions
may not occur in some telephone systems. When set to the Normal
position, a guard time of about 5 seconds is in effect to prevent these
interruptions from prematurely disconnecting the call. Depending
upon how the TEL-14 is used, it may be common to have very short
telephone calls lasting less than 5 seconds. If the
Guard Time switch S1-8 is set to Normal, the TEL-14 will not be
able to detect the disconnect pulse at the end of these short calls.
The Short setting of the Guard Time switch changes the guard time
to about 0.25 seconds. If very short calls will be common and if the
telephone system does not produce any momentary interruptions
at the start of a call, then the Guard Time switch S1-8 may be set to
the Short setting. If the short setting is used and calls sometimes
prematurely disconnect within the first few seconds, then the
Normal setting must be used. The factory setting is Normal (ON).
Switch S5-1 & S5-2 Eclipse Identification: This switch will identify the card
to a Matrix Plus II, Matrix Plus 3, or Eclipse Matrix System as a TEL14. S5-1 and S5-2 should always be operated in concert so that
either both are ON or both are OFF. If the TEL-14 is used with a
Matrix Plus 3 or Eclipse Matrix System, they should be set to the
ON position. If the TEL-14 is used with a Matrix Plus II System,
they should be set to the OFF position. The factory default setting
is ON.
Switch S7-1, S7-2, S7-3 and S7-4 Disconnect tone Selection: These
switches set the frequency of the call progress tones that the TEL-14
will sense as an indication of a disconnected call. Call progress tones
are the dial tones or busy tones often heard after the distant caller
hangs up. These tones can be used by the TEL-14 as a means of
detecting when a call is complete and must be disconnected. These
tones vary in different parts of the world and in different telephone
systems. The factory default setting for S7 is for North America. The
variety of possible settings is shown in the following table:
FREQUENCY
EXAMPLE
CADENCE*
S7-1
S7-2
S7-3
S7-4
COUNTRY
480+620 Hz
North America
Interrupted
ON
OFF
ON
OFF
350+440 Hz
North America
Steady
ON
OFF
ON
OFF
400 Hz
Chile, Thailand
Interrupted
ON
ON
OFF
OFF
425 Hz
Austria,
Germany
Interrupted
OFF
OFF
OFF
ON
440 Hz
Czech Republic
Interrupted
OFF
OFF
OFF
OFF
Table 2-1: Disconnect Tone Settings
TEL-14 TWO-CHANNEL TELEPHONE INTERFACE
2- 11
*Note: The appropriate Tone Sense switches S1-2, S1-3, and S1-4 must be
set to ON for 1 Hz cadence, 2 Hz cadence, or steady tones to be sensed
as disconnects.
Ring Jumper J6 Ring Voltage Sensitivity: If the ring voltage from the
telephone line is low and the TEL-14 will not answer to it, this
jumper can be set to the 60V position. Low ring voltages are often
encountered outside of the United States. The factory default
setting is the 90V position, providing sensitivity to the typical 90 VAC
ring found in the United States.
Option Switch Settings for Five Typical Modes of Operation
The TEL-14's panel controls and internal option switches can select
any one of a large number of modes of operation for the TEL-14. The
following paragraphs describe the settings for five of the most
common of these modes:
•
•
•
•
Intercom-station telephone access
Self-service dial-in
Manual call screening
Intercom-to-intercom
• Party line dial-in
For operating instructions for these modes, see Chapter 1. For
configuration options refer to the Eclipse Configuration System
Manual.
Intercom Station Telephone Access Mode
In “intercom-station telephone access” mode, a call on a TEL-14 line
can be answered by any intercom station with a selector key
assigned to a TEL-14 port label. Intercom stations can originate a call
by using the "dial phone" mode.
If the call must originate at another station model, then this station
must have a key programmed to activate a DTMF sequence.
Another way to arrange this is for the operator to have access to a
standard telephone set connected with the TEL-14 line (for further
information, see "Manual Call Screening Operation" below). The
default settings of the TEL-14 allow “station access” mode.
Self-Service Dial-In Mode
In “self-service dial-in” mode (also referred to as "telephone IFB"
mode), the TEL-14 will answer automatically whenever outside callers
dial in. The caller can be automatically connected to a preset partyline, station, or program feed. Using "direct inward access" the caller
can specify paths within the matrix. Auto disconnect will release the
line automatically after the caller hangs up.
To set the TEL-14 controls for self-service dial-in mode:
1. Set the "splash tones" option switch (S1-7) to OFF. This will
prevent the TEL-14 splash tones from sounding. The matrix will
supply tones to prompt inward dialing.
2. Set the remaining option switches to ON, the factory set
position, or as otherwise required.
Manual Call Screening Mode
In “manual call screening” mode, incoming calls can be answered by a
2- 12
TEL-14 TWO-CHANNEL TELEPHONE INTERFACE
"master" operator with physical access to the TEL-14 "hook"
button. A standard telephone, wired in series with the TEL-14, is
used to initially pick up the call. When the telephone has been wired
in series with the TEL-14, picking it up will not cause the interface to
go off-hook, nor will this interfere with a call already in progress.
When the call is complete, the destination station operator can
inform the master operator, and the master operator can hang up
the TEL-14 using the "hook" button. If the "auto-disconnect" option
switches are set, the TEL-14 will release the telephone line
automatically when the caller hangs up. The telephone line will not
be released if the talk path to the TEL-14 port is deactivated. This
prevents a station operator from inadvertently disconnecting an inbound caller. The destination station operator can also use the
“remote telephone-line release” feature to hang up the phone. The
operator can also originate outside calls on the standard telephone,
and make them available to destinations within the matrix.
To set the TEL-14's controls for manual call screening mode:
1. The "auto disconnect" option switches (S1-2 through S1-5) can
be set either ON or OFF. This will determine whether the
operator will be required to manually hang up the line after each
call by using the "hook" button. It is recommended, however
that the Loop Current Interruption option S1-5 be left in the ON
position to avoid instability or feedback during open switching
intervals on the telephone line at the end of a call.
2. Set the "immediate manual disconnect" option switch (S1-6) to
OFF. This will prevent callers from being accidentally disconnected
if they are transferred from one Matrix intercom station to another.
3. Set the "splash tones" option switch (S1-7) to OFF. This will
prevent the TEL-14 splash tones from sounding.
4. Set the remaining option switches to ON, the factory set
position, or as otherwise required.
Intercom-to-Intercom Mode
The TEL-14 may be used to connect two remotely located
intercom systems through a telephone line. To set up the
connection, one TEL-14 must originate a call to the other. Intercom
station equipped with a keypad can originate the call by using the
station's "dial phone" mode. If the operator of a station not
equipped with a keypad must originate the call, either he or she
must have a key programmed to activate a DTMF sequence.
After the call is made, the distant TEL-14 goes off-hook and the
incoming telephone call becomes available to the telephone keys
the TEL-14 port is preset to.
To set the TEL-14's controls for intercom-to-intercom mode:
1. The "auto disconnect" option switches (S1-2 through S1-5)
should be at the factory set ON position. This will allow the TEL14 to disconnect when the call ends.
2. Set the "immediate manual disconnect" option switch (S1-6) to OFF. (The
effect is described in the "Operation" section below.)
3. Set the "splash tones" option switch (S1-7) to OFF. This will prevent the
TEL-14 splash tones from sounding.
4. Set the "intercom echo cancel" (S6-2) and "telephone echo cancel" (S6-3)
option switches to OFF. This should be done to the TEL-14 on only one
of the intercoms.
5. Set the remaining option switches to ON, the factory set position, or as
otherwise required.
TEL-14 TWO-CHANNEL TELEPHONE INTERFACE
2- 13
In this type of connection, there is a possibility the echo canceller
DSPs in the two TEL-14 cards will interfere with each other and
cause instability. Note that setting the "intercom echo cancellation"
(S6-2) and "telephone echo cancellation" (S6-3) option switches to
OFF on one of the TEL-14 cards will improve this condition but result
in slightly more sidetone in that card.
PARTY LINE DIAL-IN MODE
Two TEL-14 lines may be programmed into the same party line.
The TEL-14s should be set to "auto answer" and "auto
disconnect" to allow people to use telephones or cellular phones
to connect to and leave the party line at will. The callers may
communicate with each other, as well as anyone on the party line.
To set the TEL-14's controls for party line dial-in mode:
1. The “auto disconnect” option switches (S1-2 through S1-5) should be at the
factory set ON position. This will allow the TEL-14 to disconnect
when the call ends.
2. Set the “Receive Suppression Disable” option switch (S6-1) to OFF.
3. If using revision 11 Matrix Plus 3 intercom software, set the "Matrix
Control" option switch (S6-5) to OFF. This will prevent intercom
users from disconnecting people who may be speaking from
telephone line to telephone line.
4. Set the remaining option switches to ON, the factory set
position, or as otherwise required.
In this type of connection, there is a possibility that excess telephone
line noise may interfere with communication on the intercom party
line, or that poor telephone connections could cause instability in
the two TEL-14 cards. For this reason it is recommended to turn
OFF the “receive suppression disable” option switch S6-1 on each
TEL-14 line programmed into the party line. This will allow the TEL14 to automatically quiet the telephone line when there is no
incoming voice.
CONFIGURATION
Refer to the Eclipse Configuration System Manual for more information
on configuring the TEL-14 telephone interface.
2- 14
TEL-14 TWO-CHANNEL TELEPHONE INTERFACE
3
MAINTENANCE
INTRODUCTION
This chapter provides a block diagram and a troubleshooting guide for the
TEL-14 two-channel auto-nulling telephone interface. To view the
diagram refer to the end of this chapter.
TROUBLESHOOTING
To help isolate any problems you may encounter, a list of possible
symptoms and possible solutions is provided. Note that the most
common option switch setting is with all switches in the ON position.
This is also the factory default setting.
1. No front panel LEDs are lit.
• Press the Auto Gain or Auto Answer buttons.
• Check that the card is properly seated in the interface frame.
Remove and reseat it.
• Check that the power cable from the interface frame is securely connected.
• Check mains AC power to the matrix.
2. The TEL-14 will not answer the telephone line. The red Ring/Off
Hook LED does not light when the line is called.
• Check that the telephone line is connected to the TEL-14. As a
test, unplug the modular cable from the RJ-11 to DB-9F adaptor
and plug it into a standard telephone set. Make sure the
telephone set can make calls and rings when a call is received on
this line. Plug the modular cable back into the RJ-11 to DB-9F
adaptor.
• Set the Ring Jumper J6 to the 60V position if the ring voltage is low.
3. The TEL-14 will not automatically answer the telephone line.
The red Ring/Off Hook LED lights when the line is called.
• Press the Auto Answer button. Make sure the green Auto Answer
LED is lit to allow calls to automatically be answered.
• Make sure the Auto Answer Ring Count option switch S1-1 is set
to the ON position to answer after the first ring. (This switch
should be set to the OFF position to answer after the fourth ring.)
TEL-14 TWO-CHANNEL TE LEPHONE INTERFACE
3-1
4. A telephone call to the TEL-14 cannot be answered from a station.
The red Ring/Off Hook LED lights when the line is called.
• Check that the call can be answered by pressing the Hook button
while the call is ringing. The Auto Answer LED should turn from
red to green when a ringing call is answered.
• Check the Matrix programming to stations which cannot pick up the call.
5. When the Self-Service Dial-In feature of the Matrix intercom is
used, additional tones are heard over the incoming call
prompts.
• Set the Splash Tones option switch S1-7 to the OFF position to
eliminate the tones that the TEL-14 produces at the start of a
call.
6. Telephone calls cannot be placed from a station. The green
Ring/Off Hook LED does not light when a call is attempted.
• Check that the telephone line can be seized by pressing the Hook
button. The Auto Answer LED should light green when the line is
seized.
• Make sure the Matrix Control option Switch S6-6 is set to the ON position.
• Check the Matrix programming to stations which cannot seize the
telephone line to make a call. Refer to the Setup Menu and
Interfaces Menu Sections of the Operation Manual.
7. Telephone calls cannot be placed from a station. The green
Ring/Off Hook LED lights when a call is attempted. Dial tone is
heard at the station.
• If DTMF dialing will not stop dial tone, press the Auto Gain button
to light the yellow Auto Gain Adjustable LED. Increase the send
volume just to the point where DTMF dialing will stop dial tone.
8. Telephone calls disconnect when transferring between Matrix stations.
• Set the Immediate Manual Disconnect option switch S1-6 to
the OFF position to allow a delay of 15 seconds before
disconnecting as a result of station release.
9. Telephone calls disconnect within 2 or 3 seconds after answering.
• Set the Sense Loop Current Interruption option switch S1-5 to
the OFF position. This condition indicates that there is below
normal DC current on the telephone line.
3- 2
TEL-14 TWO-CHANNEL TELEPHONE INTERFACE
10. Excessive echo, background noise, or instability is heard during
telephone calls or just at the start of a call.
• The TEL-14 will usually adapt within 5 seconds of the start of a call.
Before it has adapted, voices may temporarily sound hollow. This
effect is normal, but may be minimized by reducing the send and/or
receive volume settings.
• Press the Auto Gain button to light the yellow Auto Gain Adjustable
LED. Decrease the send and/or receive volume controls until
acceptable operation is attained.
• If a speaker station is used, make sure the mic gain is set low
and reduce the front panel volume level.
• TEL-14 must be made to renull the telephone line whenever it is
connected to a different telephone number. Perform the
renulling sequence described in Chapter 1.
• Set the Receive Suppression Disable option switch S6-1 to the
OFF position. This will remove noise coming in from the telephone
line.
• Set the Intercom Echo Cancel and/or Telephone Echo Cancel
option switches S6-2 and S6-3 to the OFF position. Normally this
is not necessary and it will result in an undesirable reduction of
trans-hybrid loss. These switches should only be set to the OFF
position if instability results in an TEL-14 to TEL-14 connection
between two intercoms. Never do this to both TEL-14 lines in a
connection between two intercoms.
• Set the HDX Disable option switch S6-6 to the OFF position. This
is a drastic measure which will cure instability on poor telephone
lines, but it will do this at the expense of full-duplex conversation. In
this mode, conversation will be half-duplex unless the TEL-14
automatically detects that full-duplex conversation is possible.
11. Sound on the telephone line causes the line to disconnect.
The TEL-14 incorporates a precise call progress tone detector,
so it is unlikely to sense speech.
• If a steady sound seems to be causing the disconnect, set the
Sense Dial Tone option switch S1-2 to the OFF position.
• If interrupted sounds seem to be causing the disconnect, set the
Sense Busy Tone and/or Sense Reorder Tone option switches
S1-3 and S1-4 to the OFF position.
Refer to the following figures located at the end of this chapter:
1. Block Diagram - TEL-14 Interface
TEL-14 TWO-CHANNEL TE LEPHONE INTERFACE
3-3
BLOCK DIAGRAM
Audio
From
Intercom
Audio To
Intercom
Line A
DSP
Telephone Splash
Tone Generator
Level & Call
Progress
Tone Detect
Nulling Tone
Generator
Send Level
Contacts
Level
Detect
Intercom
Splash
Tone
Generator
Telephone
Set
Hybrid
Line A
Seize,
Hold,
Disconnect
CO
POTS
Line A
Line A
Front
Panel
LEDs,
Switches,
Volume
Controls
To Line A DSP / Tone
Generators & Detectors
Ring
Detect
Line A Microprocessor I/O
Line A
Option
Switches
Test
Interface
Optical
Isolation
A Intercom
Microprocessor
Line B
Option
Switches
B Control
EEPROM
Line B
Front
Panel
LEDs,
Switches,
Volume
Controls
Line B Microprocessor I/O
To Line B DSP / Tone
Generators &
Detectors
Ring
Detect
CO
POTS
Line B
Hybrid
Line B
Seize,
Hold,
Disconnect
Intercom
Splash
Tone
Generator
Telephone
Set
Level
Detect
Contacts
Telephone Splash
Tone Generator
Audio
From
Intercom
Nulling Tone
Generator
Send Level
Level & Call
Progress
Tone Detect
Line B
DSP
Figure 3-4: Block Diagram of TEL-14 Telephone
Interface
3- 4
TEL-14 TWO-CHANNEL TELEPHONE INTERFACE
Audio To
Intercom
4
SPECIFICATIONS
AUDIO
Frequency Response
Send Gain Control Range
Send Gain (@ 0 dB setting)
Receive Gain Control Range
Receive Gain (@ 0 dB setting)
Trans-Hybrid Loss
300 Hz - 3500 Hz
± 12 dB
-12 dBv on intercom line produces -9 dBm on
telephone line
± 12 dB
-27 dBm on telephone line produces -12 dBv
on intercom line
> 40 dB, typical
RING DETECT SENSITIVITY
The TEL-14 will operate with most international telephone ring signal standards.
TELEPHONE DISCONNECT
Dial Tone*
Busy Tone*
Reorder Tone*
Loop Current Interruption
350 Hz + 440 Hz, continuous
480 Hz + 620 Hz, 0.5 sec on / 0.5 sec off
480 Hz + 620 Hz, 0.25 sec on / 0.25 sec off
> 5 mS
* or as set according to Table I3-3
TELEPHONE LINE ISOLATION
Dielectric Strength
Resistance
1500 VAC
>10 Meg ohms between each
telephone line and the Matrix Plus
Interface Frame.
POWER SUPPLY
Supplied by the matrix interface module frame's power supply
Voltage Required
Between ±8 and ±12 Volts DC Unregulated
Current Required
370 milliamps (positive supply,
maximum) 130 milliamps (negative
supply, maximum)
CONNECTORS
RJ-45 "To Matrix" Connector
DB-9M Connector
2 for Intercom connection
2 for Telephone Line, Telephone Set,
and Relay Contact connections (RJ-11
adapter supplied)
RELAY CONTACTS
Type
Voltage
Current
TEL-14 TWO-CHANNEL TE LEPHONE INTERFACE
Dry, Normally Open when TEL14 is On-Hook
24 Volts AC
2 Amps Maximum
4-1
OPERATING ENVIRONMENT
Temperature
Between 0 and 70× C (32-150× F)
PACKAGE DIMENSIONS
Frame Slot Usage
Height
Width
Depth
Weight
1 slot of Matrix Plus Interface Frame
5 1/16" (129 mm)
1 3/8" (35 mm)
9 5/32" (233 mm)
0.78 lbs (0.32 kg)
Notice About Specifications
While HME Clear-Com makes every attempt to maintain the
accuracy of the information contained in its product manuals, that
information is subject to change without notice. Performance
specifications included in this manual are design-center
specifications and are included for customer guidance and to
facilitate system installation. Actual operating performance may
vary.
4-2
TEL-14 TWO-CHANNEL TELEPHONE
INTERFACE
LIMITED WARRANTY
HME Clear-Com warrants that at the time of purchase, the
equipment supplied complies with any specification in the order
confirmation when used under normal conditions, and is free from
defects in workmanship and materials during the warranty period.
During the warranty period CLEAR-COM, or any service company
authorized by VGC, will in a commercially reasonable time remedy
defects in materials, design, and workmanship free of charge by
repairing, or should CLEAR-COM in its discretion deem it necessary,
replacing the product in accordance with this limited warranty. In no
event will CLEAR-COM be responsible for incidental, consequential, or
special loss or damage, however caused.
WARRANTY PERIOD
Return Material
Authorization (RMA)
numbers are required
for all returns.
The product may consist of several parts, each covered by a different
warranty period. The warranty periods are:
• Cables, accessories, components, and consumable items
have a limited warranty of 90 days.
• Headsets, handsets, microphones, and spare parts have a limited
warranty of one year.
• UHF wireless IFB products have a limited warranty of one year.
Both warranty and
non-warranty repairs
are available.
• UHF wireless intercom systems have a limited warranty of three years.
• All other Clear-Com and Drake brand systems and products,
including beltpacks, have a limited warranty of two years.
The warranty starts at the time of the product’s original purchase. The
warranty start date for contracts which include installation and
commissioning will commence from the earlier of date of the Site
Acceptance Test or three months from purchase.
TECHNICAL SUPPORT
To ensure complete and timely support to its customers, CLEARCOM’s User Support Center is staffed by qualified technical
personnel. Telephone and email technical support is offered
worldwide by the User Support Center.
The User Support Center is available to CLEAR-COM’s customers
during the full course of their warranty period.
Instructions for reaching CLEAR-COM’s User Support Centers are given
below.
Telephone for Europe, Middle East and Africa: +49 40 6688 4040
or +44 1223 815000
WARRANTY
i
Telephone for the Americas and Asia: +1.510.337.6600
Email: [email protected]
Once the standard warranty period has expired, the User Support
Center will continue to provide telephone support if you have
purchased an Extended Warranty.
For latest contact information please refer to the Service and Support section at
www.clearcom.com.
WARRANTY REPAIRS AND RETURNS
Before returning equipment for repair, contact a User Support Center
to obtain a Return Material Authorization (RMA). CLEAR-COM
representatives will give you instructions and addresses for returning
your equipment. You must ship the equipment at your expense, and
the support center will return the equipment at CLEAR-COM’s
expense.
For out-of-box failures, use the following contact information:
Europe, Middle East and Africa
Tel: +44 1223 815000 Email: [email protected]
NON-WARRANTY REPAIRS AND RETURNS
For items not under warranty, you must obtain an RMA by contacting
the User Support Center. CLEAR-COM representatives will give you
instructions and addresses for returning your equipment.
You must pay all charges to have the equipment shipped to the
support center and returned to you, in addition to the costs of the
repair.
EXTENDED WARRANTY
You can purchase an extended warranty at the time of purchase or at
any time during the first two years of ownership of the product. The
purchase of an extended warranty extends to five years the warranty
of any product offered with a standard two-year warranty. The total
warranty period will not extend beyond five years.Note: CLEARCOM does not offer warranty extensions on UHF wireless intercom
systems, or on any product with a 1-year or 90-day warranty.
LIABILITY
iv
THE FOREGOING WARRANTY IS CLEAR-COM'S SOLE AND
EXCLUSIVE WARRANTY. THE IMPLIED WARRANTY OF
MERCHANTABILITY AND FITNESS FOR A PARTICULAR
PURPOSE AND ANY OTHER REQUIRED IMPLIED WARRANTY
SHALL EXPIRE AT THE END OF THE WARRANTY PERIOD.
THERE ARE NO OTHER WARRANTIES (INCLUDING WITHOUT
LIMITATION WARRANTIES FOR CONSUMABLES AND OTHER
SUPPLIES) OF ANY NATURE WHATSOEVER, WHETHER
ARISING IN CONTRACT, TORT, NEGLIGENCE OF ANY
DEGREE, STRICT LIABILITY OR OTHERWISE, WITH RESPECT
TO THE PRODUCTS OR ANY PART THEREOF DELIVERED
HEREUNDER, OR FOR ANY DAMAGES AND/OR LOSSES
(INCLUDING LOSS OF USE, REVENUE, AND/OR PROFITS).
SOME STATES DO NOT ALLOW THE EXCLUSION OR
W A RR A N T Y
LIMITATION OF INCIDENTAL OR CONSEQUENTIAL DAMAGES
OR THE LIMITATION ON HOW LONG AN IMPLIED WARRANTY
LASTS, SO THE ABOVE LIMITATIONS MAY NOT APPLY TO
YOU. IN ANY EVENT, TO THE MAXIMUM EXTENT PERMITTED
UNDER APPLICABLE LAW, CLEAR-COM'S LIABILITY TO
CUSTOMER HEREUNDER SHALL NOT UNDER ANY
CIRCUMSTANCES EXCEED THE COST OF REPAIRING OR
REPLACING ANY PART(S) FOUND TO BE DEFECTIVE WITHIN
THE WARRANTY PERIOD AS AFORESAID.
This warranty does not cover any damage to a product resulting from
cause other than part defect and malfunction. The CLEAR-COM
warranty does not cover any defect, malfunction, or failure caused
beyond the control of CLEAR-COM, including unreasonable or
negligent operation, abuse, accident, failure to follow instructions
in the manual, defective or improperly associated equipment,
attempts at modification and repair not approved by CLEAR-COM,
and shipping damage. Products with their serial numbers removed
or defaced are not covered by this warranty.
This warranty does not include defects arising from installation
(when not performed by CLEAR-COM), lightning, power outages
and fluctuations, air conditioning failure, improper integration with
non-approved components, defects or failures of customer
furnished components resulting in damage to CLEAR-COM
provided product.
This limited warranty is not transferable and cannot be enforced by
anyone other than the original consumer purchaser.
This warranty gives you specific legal rights and you may have other
rights which vary from country to country.
WARRANTY
iii
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