Valcom V-2901A Service Manual

VSP-V-2901A

Issue 4

V-2901A

UNIVERSAL DOOR ANSWERING SYSTEM

INTRODUCTION

The V-2901A, Universal Door Answering System,
when used with Valcom Doorplate Speakers,
provides voice paging with handsfree reply to a door
from any telephone location. The V-2901A initiates
ring-in on the telephone system and sends a
confirmation tone to the door speaker. The individual
at the phone responding to the signal will determine if
access should be allowed. Pressing a programmed
code on the telephone dialpad or pressing the remote
button will unlock the door to allow admission. The
V-2901A also provides an alarm control output to
alert an alarm system of an unauthorized entry.

These instructions contain the specifications and
information necessary to install, operate and maintain
the Universal Door Answering System.

FCC Notice

This equipment generates and uses radio frequency
energy and if not installed and used properly, that is,
in strict accordance with the instructions listed in this
User's Manual, may cause interference to radio and
television reception.

It has been tested and found to comply with the limits
for a Class B Computing Device in accordance with
the specifications in Subpart B of Part 15 of the FCC
rules, which are designed to provide reasonable
protection against such interference in a residential
installation. If this equipment does cause interference
to radio or television reception, which can be
determined by turning off the equipment and seeing if
the interference stops, the user is encouraged to try
and correct the interference by one or more of the
following measures:

• Reorient the receiving antenna.

• Relocate the equipment with respect to the radio

or television.

• Move the equipment further away from the radio

or television.

• Plug the equipment into a different branch

circuit.

NOTE: The manufacturer is not responsible for
any radio or TV interference caused by
unauthorized modifications to this equipment.
Such modifications could void the user's authority
to operate the equipment.

SPECIFICATIONS

Access

• Electronic Key Systems

• PABXs

• 1A2 Key Systems

• Stand Alone Systems

Refer to Figure 1 for a simplified block diagram of a
typical installation.

1 947301A

with

SIMPLIFIED BLOCK DIAGRAM OF A TYPICAL INSTALLATION

E-Key
C.O.Line
Position

V-2901A
Universal
Door
Answering
System

Power
Supply

FIGURE 1

Doorplate
Speaker

Pushbutton

Features

• Compatible with PABX, E-Key and 1A2

telephone systems

• Switch selectable - loop or ground start access

• Provides handsfree talkback

• RJ11 modular connector for Tip and Ring

connections

• Power ON LED

• Provides door unlock contacts

• Programmable options:

Programming access code
Ring pattern
Activate lock relay
Duration of lock relay activation
Time door can remain open after unlock
(exit delay time)
Entry delay time
Duration of ringing
Disable station alarm
Alarm disable code
Station alert tone

• Input for manual door unlock (push-button)

• Built-in 30Hz ring voltage generator with on/off

switch

• Ringback tone to speaker

• Calls can be placed On Hold

• Background music input with volume control

• Speaker to phone volume control

• Phone to speaker volume control

• Confirmation tone

• Compatible with tone dial phones

• Works with Valcom V-1072A doorplate speaker

or other Valcom talkback or doorplate speakers

• Compatible with VPB-260 battery backup

Dimensions/Weight

• 8.60"H x 11.00"W x 2.30"D

(21.84cm H x 27.94cm W x 5.84cm D)

• 3.0 lbs. (1.36 kg)

Nominal Specifications

Input Impedance: 600 Ohms
Input Level: -10dBm Nominal
Output Impedance: 45 Ohms
Ring Supply: 90VAC, 30Hz

Power Requirements

Power Supply: -24VDC filtered
600mA minimum

Environment

Temperature: 0 to +40°C
Humidity: 0 to 85% (non-precipitating)

Components

The following equipment is recommended when
using the V-2901A:

• 1 - V-2901A Universal Door Answering System

• 1 - C. O. Line Position (Electronic Key

System); or

• 1 - Loop Trunk Position (PABX); or

• 1 - 400 type line card (1A2 key)

• 1 - Dedicated single line phone*

• 1 - Valcom Doorplate Speaker**

• 1 - VP-624B Power Supply

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* A single line telephone cannot be connected to
both the V-2901A and an incoming central office
line.

** It is recommended that one talkback speaker
be used. Use of more than one talkback speaker
may result in damage to the V-2901A. Up to 40
one-way amplified speakers may be connected to
the V-2901A speaker output.

DESIGN

The V-2901A, Universal Door Answering System,
was designed to provide voice paging with handsfree
reply to a door speaker from a telephone location.
The V-2901A initiates ring-in on the telephone
system and sends a confirmation tone to the door
when a button is pressed at the door (Valcom
doorplate speakers are normally used in this
application). The individual at the phone responding
to the signal can converse with the person at the door
and determine if access should be allowed. If the
door is equipped with an electric strikeplate, the
person at the phone can enter a programmed code on
the telephone dialpad or press a remote button to
unlock the door to allow admission. A call to the
door may also be initiated from the telephone system.

The V-2901A provides an alarm control output for
unauthorized entry. When the door lock relay is
activated and the door remains open longer than the
programmed period of time, a ground potential will
appear on pin 3 of the V-2901A (unauthorized door
opening) that can be used to signal a customer
provided alarm, auto dialer, etc. Also, if the phone is
on hook, the phone will begin ringing in a single burst
pattern. If the phone is off hook, it will receive a
momentary warble tone. After hang-up, if the door is
not closed, the alarm condition will continue.

When indication arrives that a door is open while
door station is inactive, such as a break-in, the system
waits the programmed period of time (entry delay
time) for a confirmation of entry indicating the
opening as legitimate. When this does not arrive in
the programmed time frame or if it arrives and the
door is not closed at the end of the programmed time
period, an alarm will sound in the same manner as
described above.

The V-2901A also provides a background music
input and is designed to automatically mute music
during a page. If background music is to be installed,
a low level music source such as the Valcom V-2952
FM Tuner will be required.

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Applications for the V-2901A includes a doorway,
gateway, window or secure room - just to name a few.

INSTALLATION

Cabling

A 25 pair cable with a female amphenol connector
should be run from the V-2901A to a 66 block. The
cables should be terminated on the connecting block
in standard color code. Refer to Figure 2 - Block
Connections for the pinout locations.

Mounting

The V-2901A is designed to be wall or shelf
mounted. When wall mounting the V-2901A, secure
the unit to wall studs or a suitable brace, away from
heat sources or strong magnetic fields (motors, fans,
power supplies, etc.) with controls and connectors
accessible. (A plywood backboard two feet square
and at least 1/2 inch thick attached to wall studs
would be considered a suitable brace).

Four #10 x 3/4 inch flat-head wood screws are
included for mounting. Fasten two screws on the
mounting surface, allowing them to protrude 1/8 inch
to 1/4 inch. Place the chassis of the V-2901A onto
the screwheads at the mounting slots. Position the
remaining screws and fasten through the remaining
mounting slots. Tighten screws.

Connections

Mount a 66 block on the backboard near the
V-2901A Universal Door Answering System and
label the block per Figure 2.

Move slide switch SW2 on the V-2901A to the
appropriate location, Loop or Ground Start, (see
Figure 3) depending on how the V-2901A is
accessed.

If a modular cord is used for Tip and Ring
connections, start at step ONE. For 66 block
connections start at step TWO.

___ 1. Connect one end of the modular cord to the

V-2901A RJ11 and the other end to the
appropriate line position of the phone
system. Go to step 3.

___ 2. Connect Tip of the key system line position,

loop or ground start trunk, to Pin 26 (W/BL)
and Ring to Pin 1 (BL/W).

___ 3. Connect Tip of a 45 Ohm talkback speaker

to pin 32 (R/O) and Ring to pin 7 (O/R).

___ 4. If using a door button with the talkback

speaker, connect normally open, single pole
push-button switch to Door Button
connection pin 33 (R/G) and pin 9 (BR/R)
Ground. (Figure 5 depicts the speaker/door
button hookup).

___ 5. Move slide switch SW1 (located on the

V-2901A board) to the ON position if the
telephone system is to ring when the door
button is pressed. (Refer to Figure 3 for
location).

___ 6. Connect the -24VDC power supply. -

24VDC should be connected to pin 25 (S/V)
and Ground connected to pin 50 (V/S). The
power LED located on the V-2901A board
should illuminate.

Battery Backup

A Valcom VPB-260 Battery Backup may be added to
the system to provide power in case of power failure.
The VPB-260 plugs directly into the V-2901A.
Figure 4 shows the appropriate connection. The
VPB-260 should be allowed to charge for
approximately 9 hours before operating the V-2901A.
The Valcom VPB-260 battery backup may be
used as the sole supply of power to the V-2901A.

Remote Door Unlock Relay

Figure 6 shows the V-2901A contact arrangement
available for electric strike plate operation.

Before connecting an electric lock to the V-2901A,
consult the manufacturer instructions for the proper
connecting arrangement.

Remote Push-button for Manual Door
Release

A momentary, normally open, single-pole,
single-throw switch can be connected to the system.
Pinouts to the 66 block are shown in Figure 7. Refer
to manufacturer instructions for proper connections.
The remote button should be placed in an
inconspicuous location to provide a more secure
system.

NOTE: If the remote button does not
respond, you have most likely entered a
confirmation press. Any immediate
additional presses will result in an alarm
condition.

Handsfree Indicator ("Station
Outputs")

The V-2901A supplies connections to allow a
handsfree indicator to be connected to the system.
During handsfree communication, pin 6 goes to

-24VDC when connected as shown in Figure 8.
Maximum current available is 50mA.

Door Sensor

When this contact is shorted (opening the door, gate
etc) without a legitimate dialpad or remote key press
opening, this will initiate an alarm condition. Refer
to Figure 9 for typical connections.

Unauthorized Door Opening

During an alarm state, UDO (unauthorized door
opening) goes to ground, to signal a customer
provided alarm that an alarm condition exists. Refer
to Figure 10 for typical connections.

Remote Signaling (Alerting Device)

The V-2901A supplies contacts to allow an alerting
device to be connected to the system. These contacts
follow the ringing cycle (except when using British
Ring - see note page 8) and can be used to operate a
remote signaling device such as a bell, buzzer or
light. Refer to Figure 11 for a typical connection
using these contacts.

Background Music Connections

Connect the low level (-10dBm nominal) output of a
music source to pin 29 (W/BR) and pin 4 (BR/W) of
the 66 block. Adjust output of the music source to a
low level. Volume of the background music will be
regulated by the music volume control of the V­2901A.

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