Valcom V-9941A User Manual

ONE ZONE HANDSFREE TALKBACK CONTROL UNIT
INTRODUCTION
The V-9941A is a One Zone Handsfree Page Unit for
use on an Electronic Key system line key position, a
PABX loop start trunk port, a dedicated single line
telephone or a 600 Ohm two-way page port with a
contact closure.
These instructions contain the specifications and
information necessary to install, operate and maintain
the One Zone Handsfree Talkback Control Unit.

SPECIFICATIONS

Purpose

Provides battery feed and loop detect circuitry to
properly interface with a telephone system C. O.
position or dedicated single line telephone.

Provides VOX circuit and handsfree amplifier to
drive 45 Ohm talkback speakers.

Provides 600 Ohm input with ground start input
to operate on E-Key systems with a 600 Ohm
two- way page port and a contact closure.
Applications

PABX loop start trunk port

Electronic key system C. O. Line position

Telephone systems with 600 Ohm two-way page
port and contact closure

Dedicated single line telephone
Refer to Figure 1 for a block diagram of a typical
installation.
NOTE: When used with additional
equipment, the V-9941A can also be
accessed from a push-to-talk microphone for
use in restaurant drive-in windows and other
similar applications. Contact Valcom
Application Engineering for information.
V-9941A
Features

Loop start

Input for ground start from a contact closure

Provides optional battery feed

Built in talkback amplifier

Directly drives up to two talkback speakers

Will drive Valcom one-way amplified speaker
assemblies

Screw terminals for all connections

Initial alert tone option

Repeated alert tone option

Music input

Speaker inhibit option

Operates on -24VDC "B" Battery
Limitations

Maximum of two Valcom talkback speakers plus
40 one-way amplified speaker assemblies.

Maximum allowable cable distance from control
unit to talkback speakers is 800 feet.
Capacity

Each V-9941A will provide one zone of talkback
paging

The V-9941A is a single talk path unit

Each V-9941A will drive up to two 45 Ohm
talkback speakers

Up to 40 one-way amplified speaker assemblies
may be used in addition to the talkback speakers
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