Valcom v-9940 Service Manual

Issue 5

V-9940

EXPANDABLE STATION LEVEL PAGE ADAPTER

INTRODUCTION

The V-9940 is an Expandable Station Level Page Adapter designed to provide ring trip and page access circuitry for use on standard device telephone lines. These instructions contain the specifications and information necessary to install, operate and maintain the V-9940 Expandable Station Level Page Adapter.

IMPORTANT: Please review dip switch settings (page 3) for equipment suitability.

FCC Information

When installing the V-9940, contact the local Telephone Company and give them the following information:

• The telephone number of the line to which the

V-9940 will connect;

• The FCC Registration #: BAF9I7-13957-OT-N;

• The ringer equivalence number: 1.1A

If the V-9940 is disconnected from its present line, contact the local Telephone Company to make them aware of the change.

Telephone Company Procedures: the goal of the telephone company is to provide the best service possible. In order to do this, it may occasionally be necessary for them to make changes in their equipment, operations or procedures. If these changes potentially affect the service or the operation of customer equipment, the Telephone Company will give written notice to allow any changes necessary to maintain uninterrupted service.

SPECIFICATIONS

Access Methods

• Centrex numbers

• Loop start and ground start central office lines

• PABX station numbers

Figure 1 depicts a block diagram of a typical PABX installation.

Features

• Ring trip on first ring

• 600 Ohms output; 8 Ohms output with AGC

• Multiple units may be used for multi-zone

paging with all call behind a PABX

• Use with Valcom multi-zone page control unit

for multi-zone paging Centrex or C. O. lines (DTMF signaling only)

• Use with Valcom handsfree page units for

talkback paging

• Background music input

• Open loop detect reset

• Audio sensing circuit for reset

• Time out reset

• Manual reset

• Answer verification tone

• All call override tone

• Battery reversal indicator

• Auxiliary Make/Break contact

• Built in 66 type connection block

• Complies with UL 145

1 947740

ZONE 1 IN

ZONE 2 IN

ALL CALL IN

NOTE:

When used with a PABX, the PABX must not return any tones to the called party after calling party disconnect on a station to station call.

ALL CALL IN

8 OHM OUT

ALL CALL AUDIO

ALL CALL IN

8 OHM OUT

ALL CALL AUDIO

ALL CALL OUT

8 OHM OUT

BLOCK DIAGRAM OF A TYPICAL PABX INSTALLATION

FIGURE 1

VALCOM ONE-WAY AMPLIFIED SPEAKER ASSEMBLIES

Capacity

• Each V-9940 provides one zone of paging

(when connected to its own PABX station number).

• Use a V-9940 and a station number per zone for

multi-zone paging behind a PABX.

• An additional station number and V-9940 may

be used to provide all call or override in a one-way multi-zone system behind a PABX.

• One V-9940 may be used with a Valcom

multi-zone page unit to provide up to 36 zones of paging on Centrex or central office lines (DTMF signaling only).

Dimensions/Weight

• 8.20" H x 4.55" W x 2.30" D (20.83cm x 11.56cm x 5.84cm)

• 1.7 lbs. (0.77 kg)

Power Requirements

-21.5 to -26VDC "B" Battery, 200mA maximum (recommend Valcom’s VP-624B Class 2 power source).

Environment

Temperature: 0 to +50°C Humidity: 0 to 85% (non-precipitating)

Specifications

Tip and Ring Input: 600 Ohms Voltage for Ring Trip: 75-105VAC (20 or 30Hz)

Ring Trip Timing: 150ms Open Loop Detect: 150ms starting 1 second after ring trip Audio Sense Release: 4, 8, 16, 32 or 64 seconds after audio drops below -22dBm Time Out Release: 1, 4, 8, 16, 32 or 64 seconds Manual Reset: 25ms ground Output 1: Impedance: 600 Ohms Page Level Output Level: Input Level -1dB Music Level Output Level: Input Level Output 2: Impedance: 8 Ohms Page Level: -10dBm Music Level: -17dBm Music Source: 8 to 600 Ohms

-10 to -18dBm Answer Verification Tone: 500Hz: 250ms On; 250ms Off Form C Contacts: 30VDC, 2.0 Amps or 125VAC, 1.0 Amp

DESIGN

General

The Valcom V-9940 Expandable Station Level Page Adapter is designed to provide access to paging from a standard PABX station number, a Centrex number or a Central Office line. It should not be used on coin service lines or party lines. The V-9940 may be directly connected to Valcom One-Way Amplified speaker assemblies or may be used in conjunction with Valcom one zone or multi-zone page adapters. The following sections describe possible arrangements and detail the equipment required.

When One-Way Amplified Speaker Assemblies are specified, consult the Valcom catalog for the style desired. Once the style and quantity of speakers are determined, select the appropriate power supply after referring to the Valcom One-Way Paging VSP or the Marketing Guide.

PABX Station Level Paging NOTE: Before proposing Station Level Paging,

perform the following test:

1. Dial between two stations on the PABX and answer the call.

2. Have the called party keep listening while the calling party hangs up.

3. After calling party release, what does the called party hear?

If the PABX IMMEDIATELY returns any type of tones to the called party (dial tone, reorder tone, etc.) then STATION LEVEL PAGING CAN NOT BE USED. Consult the Valcom catalog for an appropriate trunk level page adapter. If there is silence of at least 10 SECONDS before any tones are returned, then one-way paging may be used. If the line REMAINS SILENT for at least 1 and 1/2 minutes after disconnect, then one-way or talkback paging may be used.

If the type of paging desired is possible on a station level of the PABX, continue in this section to determine equipment required.

• One Zone of One-Way Paging:

This arrangement requires one PABX station number, one V-9940 page adapter, appropriate Valcom One-Way Amplified Speaker Assemblies and a -24VDC power supply.

• Multi-Zone One-Way Paging with All Call:

This arrangement requires a PABX station number and V-9940 for each zone and an additional number and V-9940 for all call. One-Way amplified Speaker Assemblies and -24VDC power supplies are also required.

• One Zone of Talkback Paging: This arrangement requires one V-9940, one V-9941A, one-zone talkback unit, appropriate 45 Ohm talkback speakers (maximum 2), and a VP-624B power supply. See Note.

Centrex or C. O. Line Access to Paging:

Note: Although the V-9940 will work on both loop start or ground start lines, when using Centrex service, ground start lines provide better security against returned tones. In addition, Centrex lines should be optioned for cut OFF when disconnect occurs.

• One Zone of One-Way Paging:

One zone of One-Way Paging requires one Centrex or C. O. Line, a V-9940, One-Way Amplified Speaker Assemblies and a -24VDC power supply.

• Multi-Zone One-Way Paging:

Multi-zone One-Way Paging requires one Centrex or C. O. Line, a V-9940, a dial select page control unit (V-2003A, V-2006A, V-1109RTVA, V-119RTVA or V-136RTHF), appropriate One-Way Amplified Speaker Assemblies and a -24VDC power supply.

Note: All Call is included with the V-2003A, V-2006A and the V-1109RTVA.

It may be added to the V-119RTVA with a V-1118 and to the V-136RTHF with a V-1134. See Note.

• One Zone of Talkback Paging:

One Zone of Talkback Paging requires one Centrex or C. O. Line, one V-9940, one V-9941A, one zone talkback unit, 45 Ohm talkback speakers (maximum

2) and a VP-624B power supply. See Note.

• Multi-Zone Talkback Paging:

Multi-Zone Talkback Paging requires one Centrex or C. O. Line, one V-9940, a dial select page control unit (V-2003AHF, V-2006AHF, V-1109RTHF, V-119RTHF or V-136RTHF), appropriate talkback speakers and a -24VDC power supply.

NOTE: One-way All Call is included with the V-2003AHF, V-2006AHF, and V-1109RTHF. It may be added to the V-119RTHF with a V-1118 and to the V-136RTHF with a V-1134. See Note.

Wiring of each arrangement is covered in the Installation Section.

NOTE: When using the V-9940 Expandable Station Level Paging Adapter to access multi-zone or handsfree control units, it should be understood that the quality and noise characteristics of the C . O. Line circuit may affect the operation of this equipment adversely.

Dip Switch Settings

The dip switch settings are crucial to proper operation of the V-9940 and are different for each application. The dip switches select the way the V-9940 releases from the line and how long a page may be made. There are three ways the V-9940 releases from the line that are dependent on dip switch settings:

Open Loop Detect

The V-9940 detects a 150ms or longer break in loop current one second after ring trip and release from the line. The one second delay in line supervision is allowed due to the instability of some C. O. and Centrex lines for the first second after ring trip.

Dip switch settings: Set dip switches 1 and 8 "ON", dip switches 2 through 7 "OFF".

NOTE: This setting provides unlimited page length. In certain instances a default timeout release is recommended. To select a default

timeout, turn one of dip switches 2 through 7 "ON". Refer to Figure 4 for the maximum page length each dip switch allows.

110-16, 110-17, and 110-18 of the National Electrical Code, ANSI/NFPA No. 70.

Time Out Release

The V-9940 will release from the line a pre-determined amount of time after ring trip as determined by dip switch settings.

Typical Applications: Access from a PABX Station to one zone of talkback page (station level access not normally used with talkback).

Dip Switch Settings: Set dip switches 1 and 8 "ON". Set one of dip switches 2 through 7 "ON" to select the maximum page length.

NOTE: This setting assigns a limited page length. See PABX Station level Paging to determine if the PABX is compatible for station level page.

Audio Sense Release

The V-9940 will release from the line after a pre-determined amount of time that silence is detected as determined by dip switch settings.

Typical Applications: Access from a PABX Station to one zone of one-way page or multiple zones of one-way page using multiple PABX stations and multiple V-9940s.

Dip switch settings: Set dip switch 1 "OFF", dip switch 8 "ON". Set one of dip switches 2 through 7 "ON" to select the length of time the unit stays active after last sensing audio. (Normally dip switch 6 or 7

- for 8 or 4 seconds).

NOTE: This setting provides unlimited page length. See PABX Station Level Paging to determine if the PABX is compatible for station level page. When used with talkback paging, the talkback audio may delay or cancel the audio sense release.

In some special applications, a manual reset can be used to provide release from the line by providing a momentary ground to the manual reset pin of the V-9940.

INSTALLATION

Regulatory Information

This equipment is to be installed only in restricted access areas (dedicated equipment rooms, equipment closets or the like) in accordance with Articles

CAUTION: To reduce the risk of electric shock,

Refer servicing to qualified service personnel.

When using this equipment, basic safety precautions should always be followed to reduce the risk of fire, electric shock and injury to persons including the following:

1. Never install telephone wiring during a lightning storm.

2. Never install telephone jacks in wet locations unless the jack is specifically designed for wet locations.

3. Never touch uninsulated telephone wires or terminals unless the telephone line has been disconnected at the network interface.

4. Use caution when installing or modifying telephone lines.

General

The following sections contain step-by-step instructions for wiring the V-9940 and associated Valcom equipment. If the results of a test do not correspond with what is shown, DO NOT PROCEED UNTIL THE PROBLEM HAS BEEN CORRECTED.

During installation, Figure 2 may be referred to for location and numbering of punchdown block. Refer to Figure 3 for punchdown block pinouts and Figure 4 for dip switch settings.

NOTE: To aid system testing and balancing, be sure to set the individual volume controls at approximately ½ volume when installing one-way amplified speaker assemblies.

CAUTION

RISK OF ELECTRIC SHOCK

DO NOT OPEN

Do not remove cover.

No user serviceable parts inside.

This symbol indicates that dangerous voltage constituting a risk of electric shock is present within this unit.

This symbol indicates that there are important operating and maintenance instructions in the literature accompanying this unit.

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