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Your AT&T Information Systems Sales Representative

or

Call:Your Business Sales and Service Center

or

The AT&T Customer Information Center, 1-800-432-6600

AT&T Customer Information Center

Write:P.O. Box 19901

Indianapolis, IN 46219

Order:Document Number 518-600-031

For Technical Assistance Call :

GBS Technical Support 1-800-552-3293

Limited Warranty and Limitation of Liability

AT&T warrants to you that the product will be free from defects in material and workmanship when title passes to you. If you notify AT&T that the product has failed to operate as warranted within one year of the date title passes to you, AT&T will, at its option, repair or replace the component or components of the product that failed to operate as warranted. Any repair or replacement components may be new or refurbished and will be provided on an exchange basis. If AT&T determines that the product cannot be repaired or replaced, AT&T will refund the purchase price to you.

If you purchase the product directly from AT&T, AT&T will perform warranty repair on your premises in accordance with the terms and conditions of AT&T???s ???Business Day??? or ???Around-the-Clock??? warranty plans. The details of AT&T???s warranty plans may be obtained from AT&T. If you purchased the product from an authorized dealer, you will be covered by AT&T???s authorized dealer plan during the warranty period. Contact your authorized dealer for details of AT&T???s authorized dealer warranty plan. AT&T???s obligation to repair, replace or refund as set forth above is your exclusive remedy.

The limited warranties provided above do not cover damages, defects, malfunctions or product failures caused by:

???Failure to follow AT&T???s installation, operation or maintenance instructions;

???Unauthorized modification or alteration of the product or its components;

???Product abuse, misuse or the negligent acts of persons not under the reasonable control of AT&T;

???Actions of third parties and acts of God other than power surges (e.g., lightning).

This limited warranty applies only to the product purchased directly from AT&T or purchased directly from an authorized AT&T dealer. This limited warranty does not apply to products purchased or operated outside the United States.

You may be required to provide AT&T with proof of purchase before AT&T will perform any warranty replacements.

EXCEPT AS SPECIFICALLY SET FORTH ABOVE, AT&T, ITS AFFILIATES, SUPPLIERS AND DEALERS MAKE NO

WARRANTIES, EXPRESS OR IMPLIED, AND SPECIFICALLY DISCLAIM ANY WARRANTY OF MERCHANTABILITY

OR FITNESS FOR A PARTICULAR PURPOSE.

EXCEPT FOR PERSONAL INJURY, THE LIABILITY OF AT&T, ITS AFFILIATES, SUPPLIERS AND DEALERS FOR

ANY CLAIM, LOSS, DAMAGE OR EXPENSE FROM ANY CAUSE WHATSOEVER, REGARDLESS OF THE FORM

OF THE ACTION, WHETHER IN CONTRACT, TORT OR OTHERWISE, SHALL NOT EXCEED THE LESSER OF

DIRECT DAMAGES PROVEN OR THE REPAIR OR REPLACEMENT COST OF THE SYSTEM OR THE SYSTEM???S

PURCHASE PRICE. IN NO EVENT SHALL AT&T, ITS AFFILIATES, SUPPLIERS AND DEALERS BE LIABLE FOR

INCIDENTAL, RELIANCE, CONSEQUENTIAL OR ANY OTHER INDIRECT LOSS OR DAMAGE (INCLUDING LOST

PROFITS OR REVENUES SUSTAINED OR INCURRED IN CONNECTION WITH THE SYSTEM). THIS LIMITATION

OF LIABILITY SHALL SURVIVE FAILURE OF THE EXCLUSIVE REMEDY SET FORTH IN THE LIMITED WARRANTY

ABOVE.

AT&T

UPAM-K

Universal Paging Access Module

Installation Manual

Issue 2, June 1990

Bogen Part No. 54-5916-02

Printed in U.S.A. 9006

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 - CD23CH-17705-KX-N

Ringer Equivalence - 1.2B

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.

Table of Contents

1.Product Identification

UPAM-K Universal Paging Access Module Kit

The UPAM-K Universal Paging Adaptor Module Kit designed to provide telephone access to most commonly available paging systems. It works with loop- and ground-start trunk ports, station ports or paging ports, and is compatible with the full range of currently available telephone equipment, i.e., PABX, stand-alone 1A2-Key, Electronic Key, Hybrid Electronic Key, or Centrex.

Overview

The Model UPAM-K consists of the access module, 48-volt power supply, interface transformer and miscellaneous connectors (listed below). The functional unit provides telephone and paging system connections, background music input (BGM) and modular page port connector, switches to select operational features, and adjustment controls. The unit is compact, housed in a steel case and is designed to be mounted on a wall.

8-conductor modular connector cord RCA jack connector cord

RCA jack to phone jack adaptor RCA jack to mini-jack adaptor

Features

???Acts as point of demarcation

Acts as a point of demarcation between telephone system and customer paging equipment.

???24V or 48V operation (trunk port operation)

Mode switches let you select 24-volt or 48-volt operation. A 48-volt power supply is included to provide 48-volt trunk port operation (a 24-volt power supply is required for 24-volt operation).

???Preannounce and Confirmation Tones

A preannounce tone (heard at the telephone and the loudspeakers) or confirmation tone (heard only at the telephone) can be selected with mode switches (one of these modes must be selected for the unit to operate properly). A screwdriver-adjustable control (TONE VOL) sets the level of each.

(Note: when used with ground-start trunk ports, only the preannounce option can be used.)

???VOX Delay Timer

Voice controlled disconnect timer, for use in station port operation is enabled with a mode switch. This automatically disconnects the line after a predetermined interval of silence (from 2 to 6 seconds, set with the VOX DELAY control; the setting may be critical with telephone systems that issue a rapid reorder tone after the paging party hangs up).

???Default Timer

A default timer sets the maximum time allotment for paging (6 to 35 seconds, set with the PAGING TIME control). This timer ensures that the unit will always disengage the line by forcing a disconnect, if the other disconnect functions are disabled or not available with a specific telephone switch.

Note: The timer may be inhibited; see Default Timer Modifications on page 9 for procedure.

???Background music input jack and volume control

An RCA-type jack (BGM IN) accepts background music sources from the paging system. The level can be set with the BGM VOL control. An RCA-jack connector cord and RCA jack adaptors are included in the kit to connect with some common background music sources.

???Contact Closures

Two normally-open contact closures are provided on the UPAM which change state when the unit is activated. One set is located on the punch block (terminals N.O. and COM), and the other one on the bottom side of the unit (terminal strip). One contact closure can be used for ground start operation. The second contact closure is available to provide control of external equipment or functions. When the UPAM is used on a loop start trunk, page port, or station line, both contact closures become available to provide control of external equipment or functions.

???Direct connection to page ports through a modular jack on the side of the unit

An 8-conductor modular connector cable is included for easy connection to modular page ports.

Important Power Supply Note

One of two types of power supply are shipped with the UPAM-K. The drawings below will assist you in locating the proper terminals so that you can connect it to the UPAM correctly.

Note: the order of the terminals differs from one supply to the other. Be sure to observe correct polarity when connecting power supply.

117V

200 mA

60 Hz

117 V

200 MA 60HZ

CAUTION: INDOOR USE ONLY IN

A CONTROLLED ENVIRONMENT

MODEL PRS-48

CLASS 2 POWER SUPPLY

CAUTION: FOR INDOOR USE ONLY

2.Connection to the Telephone System

General Instructions

This section contains installation procedures for connection to the telephone system. You should first follow the General Instructions and then refer to the Specific Instructions for the type of telephone switch to be connected (loop- or ground-start trunk port, station port, page port). Finally, refer to Section 3 for connections to the paging system.

You will need the following tools for installation: standard flat-blade screwdriver; phillips-head screwdriver; wire cutter/stripper/crimper; punch-down tool for Type 66 Block.

Select location and physical installation

The UPAM may be mounted on a wall or backboard. It can be located either in close proximity to the telephone equipment (a modular cord is included and can be used to connect the unit to the telephone system) or near the paging equipment. To install the unit using the keyhole slots, install two screws (not included) with a 7-??" center, letting the screw heads protrude ??" from the wall. Position the unit on the screws through the slots then tighten the screws. A 110V AC outlet should be located nearby when using the UPAM with trunk port equipment.

Grounding

The UPAM is designed with protection devices which are intended to shunt to ground any excess (surge) voltage appearing on the Tip and Ring input pair. The metal case of the UPAM must be grounded to a ground shorting bar, if available, or to a suitable electrical (earth) ground. Connect a ground wire (with a fork-terminal, included) between the case and the screw on the lower left-hand corner of the module. An external-tooth lockwasher ensures a good connection between the case and ground terminal.

Mode switches

A set of 5 mode switches (S1 through S5, see the illustration on the previous page) is included to set the power supply voltage, confirmation or preannounce tone, and VOX operation. These switches are accessible through an opening in the front cover and can be moved with a pointed tool, such as the tip of a ball point pen. Set the switches as described in the Specific Instructions, which follow.

Power supply connections

No power supply is required when the UPAM is connected to a PABX station port (supplying analog ring voltage and approximately 48-volt of Talk Battery) or Centrex line. One of two types of power supply is included in the UPAM-K. You can identify the power supply from the illustration on page 3. Note the location of the output terminals; they are not in the same order. Either supply will power the UPAM and provide 48 volt talk battery for trunk port or page port operation. The illustrations in the Specific Instructions section show the correct connections from a typical power supply to the UPAM module.

Internal adjustments

Certain options are available (described in Specific Instructions section) which require the removal of the cover and the modification of certain components. The illustrations on page 11 show the different revision levels of the printed circuit boards used, and identify the location of the important components.

A small parts bag is located under the cover, either taped to the inside of the cover or wedged between the case and a large capacitor in the upper right-hand corner of the chassis.

Paging system connections

Illustrations showing connection of the UPAM to a typical paging system are included in the third section of this manual. If you need more information about paging systems, consult the UPAM CPE Reference Guide, available from AT&T.

Troubleshooting

A Functional Test Guide in Section 4 isolates problem areas, if they arise, following installation.

Specific Instructions

Trunk Port Connections ??? Ground Start

Controls for VOX Delay, Page Time, and Mode Switch S5 are not operable in this mode.

Procedure

1.Mount and ground the UPAM as described in General Instructions.

2.Set mode switches S1 and S2 in OFF position for use with the 48-volt power supply, or ON position if a 24-volt power supply is used.

3.Set mode switch S3 to ON position and S4 to OFF position (see Note 1).

4.Connect a jumper wire between N.O. and T terminals on UPAM.

5.Connect ???Tip??? of trunk port toCOM terminal on UPAM.

6.Connect ???Ring??? of trunk port toR terminal on UPAM.

7.Connect PT and PR terminals on UPAM to the paging system, as shown in Section 3. Also, connect any background music source to the BGM IN jack on the UPAM.

8.Connect UPAM +24/48V terminal to PBX ground (see Note 2).

9.Connect power supply + and - terminals to +24V/48V and -24V/48V terminals on UPAM, respectively. Plug the power supply into a grounded 110VAC wall outlet.

10.Call the system and adjust the volume of the page using the paging system???s amplifier volume control.

11.Hang up and adjust the background music level using UPAM BGM VOL control.

12.Call the system and adjust the volume of the preannounce tone using UPAM TONE VOL control.

Notes:

1.Only preannounce tone is available for ground start trunk applications.

2.Usually the AC GND terminal on the 48 volt power supply included can be used to provide this connection.

Specific Instructions

Station Port/Centrex Connections

Disconnect methods

In station port operation, the UPAM provides CPC ??? calling-party-controlled (loop current interrup- tion) disconnect, default timer disconnect, or optional voice-operated (VOX) disconnect. The calling- party-controlled disconnect recognizes a line-issued disconnect signal and immediately disengages the UPAM from the line (this feature cannot be adjusted or inhibited). The default timer causes the UPAM to release after a user-determined period of time ensuring that the UPAM will always disengage the line if the other disconnect functions are disabled or inoperative. (The default time is approximately 6 to 35 seconds, but can be increased or inhibited; see Default Timer Modifications, on the next page.) The voice-operated (VOX) disconnect feature has the ability to preempt the default timer and disconnect the line after a predetermined interval of silence (approx. 2 to 6 seconds, set with VOX DELAY) has elapsed. The VOX feature is turned on or off with mode switch S5.

Procedure

No power supply is used for Station Port/Centrex operation.

1.Mount and the ground the UPAM as described in General Instructions.

2.Set mode switches S3 and S4 for Preannounce or Confirmation tone (as desired).

One of these modes must be selected for UPAM to operate correctly.

3.Place mode switch S5 in the Off position.

4.Connect ???Tip??? of station port toT terminal of UPAM.

5.Connect ???Ring??? of station port toR terminal of UPAM.

6.Connect PT and PR terminals on UPAM to the paging system, as shown in Section 3. Also, connect any background music source to the BGM IN jack on the UPAM.

7.Set the Default Timer by calling the system, and measuring the length of time before the call is disconnected. Adjust the PAGING TIME control and repeat and readjust as necessary.

8.Call system and set the page volume using the paging system???s amplifier volume control.

9.Hang up and adjust the background music level using UPAM BGM VOL control.

10.Call the system and adjust the volume of the preannounce/confirmation tone volume using the TONE VOL control. (Note: If the tone can be heard over the paging system but is shortened, or if it is absent in the handset, it may be necessary to increase the length of ring before the UPAM answers. See Ring Delay on page 10.)

11If the VOX disconnect is to be used, adjust the VOX delay. To do this, make sure mode switch S5 is in the ON position and proceed as follows:

11.1Rotate VOX DELAY control approximately 1/2 way.

11.2Call the system and, after the preannounce or confirmation tone, speak into the telephone for 5 seconds at a normal voice level then stop and evaluate the time delay before disconnection. If it is sufficiently long to allow for pauses in phrases without disconnecting, proceed to the next step. If necessary, readjust VOX DELAY and repeat step.

Note: The minimum VOX delay is approximately 2 seconds. On some systems, which return a reorder tone to the called party within 2 seconds of hang up, VOX DELAY cannot be used.

Default Timer Modifications

Inhibit default timer

A field modification is available to inhibit the default timer. Do not inhibit the timer if jumpers J2 & J3 have been removed as outlined in Important Centrex Modification, below, and the VOX delay timer has been disabled (S5 is OFF). This situation may cause the UPAM to remain off-hook indefinitely. Also, do not inhibit both timers unless the station line has CPC capability.

Some older UPAM equipment may not have jumper J3 (refer to the illustrations on page 11 to determine the revision level of the pc board and the location of the jumpers). Do not inhibit the default and VOX disconnect features and rely solely on CPC to provide disconnect control on these models. If this is unavoidable, then replace the UPAM with one showing a date code of 90A or later. (The date code is the first two numbers and letter of the unit???s serial number, printed on a sticker on the rear panel of the unit. The code is also stamped on the outer carton below the UPAM-K name.)

To inhibit the default timer, proceed as follows (note that the other disconnect methods are still available when the default timer is inhibited):

1.Open UPAM by removing 4 screws. Lift cover straight off while tilting up the left side of the cover to clear the punch block.

2.Locate and remove capacitor C4 mounted in a 2-pin socket on the upper left corner of the printed circuit board (refer to the illustrations on page 11 for the location of the capacitor).

3.Replace the capacitor with the 10kilohm resistor (color code: brown-black-orange) supplied in the parts bag. The parts bag is either taped to the inside cover or wedged between a large capacitor and the upper right-hand corner of the chassis. Bend and cut the resistor wire as shown below.

4.Replace the cover and screws.

Changing default time

To change the timing of the default timer, replace component C4 (located in the upper left-hand corner by the transistor with the black heat sink) with the 100?? F, 6.3V Tantalum capacitor supplied in the parts bag located inside the UPAM enclosure. This capacitor will change the default time to 17 seconds minimum to 2 minutes maximum. First follow steps 1 and 2 above and then install the capacitor by cutting its leads to approximately 1/4 inch and inserting into the socket at C4 so that the lead marked with a ( + ),

or with a vertical bar is in the lower socket hole, as shown:

??"

C 4

Important Centrex Modification

Some phone systems (in particular, Centrex-type systems) may produce open-switch-intervals (OSIs) when the UPAM first answers the line. OSIs are short breaks in loop current resulting when the central office switches equipment on and off the line. The UPAM may misinterpret these OSIs as disconnect signals. It may be necessary to remove jumpers J2 and J3 from the printed circuit board (see the illustrations on page 11 for the location of these jumpers) if the UPAM exhibits any of the following symptoms during station mode operation. Do not remove the jumpers unless you are confident that an OSI problem exists, and the UPAM has been verified as functional by following the troubleshoot- ing procedures in Section 4.

Symptoms:

1.UPAM disconnects from the line immediately after answering.

2.UPAM answers and remains connected to line but the page audio does not come through the paging system. This condition is verified if the UPAM external contact closures are still open during a page.

3.Connection to the Paging System

General Guidelines

The UPAM is designed to connect to typical ???centrally-amplified??? and ???self-amplified??? paging and sound systems. ???Centrally-amplified??? systems generally use one amplifier to distribute the page audio to large numbers of speakers. ???Self-amplified??? systems generally rely on small amplifiers, built-in on each speaker or horn. Since the types of connectors used on this equipment varies, and is not standard between manufactures, you should be familiar with the basic features of these systems so that you can connect the UPAM to the correct input.

Installation consists of connecting the PR and PT terminals on the UPAM to the proper paging system input terminals. In a central-amplified system, the amplifier???s 600-ohm/Lo-Z input provides the ideal connection; however connection can be made to Hi-Z or microphone inputs, when the transformer (Model WMT-1A) included in the UPAM-K is used. In self-amplified systems, connection can be made to the individual amplifiers or to a smaller buffer amplifier.

The illustrations in this section provide basic hookup information to typical equipment, and procedures may vary. Read the UPAM CPE Reference Guide to gain a better understanding of paging systems and input types.

You should be aware that certain self-contained, customer-owned telephone paging systems (i.e., Terryphone) are not compatible with UPAM installation. These systems were originally installed with dedicated telephones or handsets. They were not designed to work in conjunction with a telephone system, and provide no compatibility for page port access.

Typical Installations

Connecting the UPAM to an amplifier???s Lo-Z/600-ohm input

You can connect the UPAM directly to an amplifier???s 600-ohm input. Some of the procedures below may vary. The illustration on the next page shows a typical installation.

1.Make sure that the amplifier is turned off.

2.Connect one side of the amplifier input to the UPAM PT terminal.

3.Connect the other the other side of the amplifier input to the UPAM PR terminal.

4.Connect any background music source to the BGM IN jack (RCA-type) on the UPAM.

Caution

If the amplifier???s input is unbalanced (one side of the input terminal is connected to ground), you must connect the PR terminal on the UPAM to the grounded amplifier terminal. Reversing these connections can short the BGM source output. (The WMT-1A transformer can be used to "float" the unbalanced input and eliminate this problem.

5.Connect speaker loads to amplifier???s output terminals, if necessary.

6.Turn amplifier volume control to minimum.

7.Turn amplifier on.

8.Set amplifier level (see Specific Instructions for the particular telephone access mode being used).

PAGING AMPLIFIER WITH 600 OHM TELEPHONE INPUT

Typical Connection to a Lo-Z/600 ohm input