TAMB2
Telephone Paging Access Module
The TAMB2 telephone paging access module provides a means of interfacing various analog telephone port types to a paging system amplifier to enable a facilityʼs telephone system to be used to make audio announcements over its paging system. The TAMB2 will interface to analog loop start and ground start trunk ports as well as analog ring-up station lines. It provides a means of connecting an external audio or music source that will play over the paging system when no pages
are in progress. A set of contacts are provided to signal external equipment of the TAMB2ʼs operational status. Various DIP switches and controls provide a wide range of flexibility over how the access module will operate. The TAMB2 can be mounted on a wall, mounted as a single unit in a rack (optional rack mount kit required) or mounted 2-up, side-by-side in a single rack space.
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TRUNK |
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GND START |
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VOX DIS |
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PRE ANN TN |
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RANGE (SEC) |
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1 1<INHIBIT |
PAGING |
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TIME |
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TAMB2 TELEPHONE PAGING ACCESS MODULE |
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VOX |
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STATION/ |
PAGE |
CONTACT |
24VDC |
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1.DIP Switches - Set various operational functions.
2.On/Power Indicator - When lit, indicates that the unit is powered on.
3.Paging Time Control - Sets maximum time duration of a page.
4.VOX Delay Control - Sets maximum silence period allowed for an active page.
5.Tone Control - Sets the level of an announcement tone the unit produces.
6.Music Control - Sets the level of an external audio source that plays through the paging system when no page is active.
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7.Music Input - Hi-impedance unbalanced RCA input for stereo or mono signals.
8.Station/Trunk - Tip and ring connections to a PBX or CO line.
9.Page Out - Balanced, 600-ohm audio feed to the paging amplifier.
10.G/S Terminal - Provides ground return from PBX when using a ground start trunk port.
11.Contact Closures - One C-form contact set which changes state when unit is active.
12.24V DC - User-supplied power supply input; unit must be powered in all modes of operation.
© 2010 Bogen Communications, Inc. All rights reserved. Specifications subject to change without notice.
54-2190-02C 1101
Notice
Every effort was made to ensure that the information in this manual was complete and accurate at the time of printing. However, information is subject to change.
FCC Statement (Part 15) - Radio Frequency Interference
This unit generates and uses radio frequency energy and if not installed and used in strict accordance with the manufacturer's instructions, may cause interference to radio and television reception. Testing is being conducted for compliance with the limits for a Class B device in accordance with the specifications in Part 15 of the FCC Rules and Canadian D.O.C. regulations. This testing is designed to provide reasonable protection against such interference. However, there is no guarantee that interference will not occur in a particular installation. If this equipment does cause interference to radio or television reception, which can be determined by turning the unit off and on, the user is encouraged to try to correct the interference by one or more of the following measures:
-Reorient the radio or TV receiving antenna.
-Relocate the unit with respect to the radio or TV receiver or vice versa.
-Plug the unit into a different outlet so that it and the radio or TV receiver are on different branch circuits.
If necessary, the user should consult the dealer or an experienced radio/television technician for additional suggestions. The user may find the following booklet, "How To Identify and Resolve Radio-TV Interference Problems," helpful. This booklet was prepared by the Federal Communications Commission (FCC) and is available from the U.S. Government Printing Office, Washington, DC 20402. Stock order No. 004-000-00345-4.
Federal Communications Commission (FCC) Statement (Part 68)
This equipment is component registered with the Federal Communications Commission (FCC) in accordance with Part 68 of its rules. In compliance with the rules, be advised of the following:
Registered equipment may not be used with Coin Telephone Lines. Equipment may be used with Party Lines in areas where state tariffs permit such connections and when equipment is adaptable for such service.
This equipment is registered as follows:
Registration Number - US: CD2PA13BTAMB2
Ringer Equivalence - 1.3B
If trouble is experienced, the equipment should be disconnected from the interface to determine if this equipment, or the telephone line, is the trouble source. If the equipment is determined to be malfunctioning, it should not be reconnected until repairs are effected.
Repairs to this equipment, other than routine repairs, can be made only by the manufacturer or its authorized agents.
If the equipment causes harm to the telephone network, the local telephone company may temporarily discontinue your service and, if possible, notify you in advance. If advance notice is not practical, you will be notified as soon as possible. You will be given the opportunity to correct the problem and informed of your right to file a complaint with the FCC.
The local telephone company may make changes in its facilities, operations, or procedures that could affect the proper functioning of your equipment. If they do, you will be given adequate notice in writing to allow you an opportunity to maintain uninterrupted telephone service.
Important Safety Information
Always follow these basic safety precautions when installing and using the system:
1.Read and understand all instructions.
2.Follow all warnings and instructions marked on the product.
3.DO NOT block or cover the ventilation slots and openings. They prevent the product from overheating. DO NOT place the product in a separate enclosure or cabinet, unless proper ventilation is provided.
4.Never spill liquid on the product or drop objects into the ventilation slots and openings. Doing so may result in serious damage to the components.
5.Repair or service must be performed by a factory authorized repair facility.
6.The product is provided with a UL-CSA approved, 3-wire ground type plug. This is a safety feature. DO NOT defeat the safety purpose of the grounding type plug. DO NOT staple or otherwise attach the AC power supply cord to building surfaces.
7.DO NOT use the product near water or in a wet or damp place (such as a wet basement).
8.DO NOT use extension cords. The product must be installed within 6 feet of a grounded outlet receptacle.
9.DO NOT install telephone wiring during a lightning storm.
10.DO NOT install telephone jacks in a wet location unless the jack is specifically designed for wet locations.
11.Never touch uninsulated wires or terminals, unless the line has been disconnected at the paging or controller interface.
12.Use caution when installing or modifying paging or control lines.
CAUTION
RISK OF ELECTRIC SHOCK
DO NOT OPEN
CAUTION: TO PREVENT THE RISK OF ELECTRIC SHOCK, DO NOT REMOVE ANY FRONT/BACK COVERS OR PANELS. NO USER-SERVICEABLE PARTS INSIDE.
REFER SERVICING TO QUALIFIED PERSONNEL.
The lightning flash with arrowhead symbol, within an equilateral triangle, is intended to alert the user to the presence of uninsulated "dangerous voltage" within the product's enclosure that may be of sufficient magnitude to constitute a risk of electric shock to persons.
The exclamation point within an equilateral triangle is intended to alert the user to the presence of important operating and maintenance (servicing) instructions.
Theory of Operation
Loop Start Interfacing:
The TAMB2 provides a 24V DC talk battery on its T (tip) and R (ring) terminals. When it detects a DC loop current flow through these terminals, it will activate. Upon activation, it will produce an announcement tone and connect in the paging amplifier through an isolation transformer. The announcement tone can be set to be heard only at the paging phone or at both the phone and over the paging system. The TAMB2 allows bi-directional audio, both to and from the paging equipment
Ground Start Interfacing:
In addition to the tip and ring connections to this port, an additional connection between the TAMB2ʼs G/S terminal and the PBX ground must be established. When idle, the TAMB2 opens an internal relay contact in series with its T (tip) terminal, and monitors for loop current flowing in its R (ring) terminal. When the PBX grounds the TAMB2ʼs R terminal, loop current flows and is detected. The TAMB2 responds by closing the relay contact in series with its T terminal. Once this connection is established, the TAMB2 will produce an announcement tone and connect in the paging amplifier through an isolation transformer. The announcement tone can be set to be heard only at
Trunk Timer Feature:
When interfacing to either loop or ground start trunks, a Trunk Timer feature can be enabled which will interrupt loop current flow to the PBX port for 1 second after either the VOX or Default time has expired. In many PBX systems this break in loop current will cause the connection between the TAMB2 and the calling station to be cleared, allowing another caller to access the paging system. This is designed to protect the
Station Port Interfacing:
The TAMB2 answers the station port after it detects high voltage (90V) ring on the line. The unit can be set to answer the call immediately or after the end of the first ring burst. Once answered, the unit provides an announcement tone and connects the telephone line to the paging amplifier through an isolation transformer. The announcement tone can be set to be heard only at the paging phone or at both the phone and over the paging system. The TAMB2 allows bi-directional audio, both to and from the paging equipment (in the case of talkback paging equipment). Since the TAMB2 cannot directly determine the state of the calling partyʼs phone, it must use
(in the case of talkback paging equipment). Disconnection of the page happens when the loop start trunk goes on hook and loop current flow stops. In this mode, the TAMB2 responds to the status of the loop current flow and generally no timers are needed to control when it disconnects. However, a Trunk Timer feature is provided that can help prevent accidental lock-up of the paging system (see featureʼs description below).
the paging phone or at both the phone and over the paging system. The TAMB2 allows bi-directional audio, both to and from the paging equipment (in the case of talkback paging equipment). Disconnection of the page happens when the ground start trunk goes on hook and loop current stops. In this mode, the TAMB2 responds to the status of the loop current flow and generally no timers are needed to control when it disconnects. However, a Trunk Timer feature is provided that can help prevent accidental lock-up of the paging system (see featureʼs description below).
paging system from a phone that may have been hung up incorrectly and is locking out access to the paging system. In addition to enabling this feature, the Default time period must be set and/or the VOX timer must be enabled and its time set. Both timers do not have to be used, but at least one must be enabled for this feature to work.
indirect methods to determine when to disconnect. Disconnection of the TAMB2 from the call is controlled through 3 methods. 1) A default timer will drop the call after a preset amount of time has elapsed (1-200 seconds), 2) A VOX timer will drop the call after it detects no audio for a preset amount of time (1-11 seconds), 3) The unit will immediately drop the line if it detects a CPC pulse (break in loop current) from the PBX/CO port. Any of these disconnection methods can be inhibited, however at least one must be enabled to ensure that the TAMB2 will disconnect.
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