Valcom V-9941A User Manual
Issue
5
1 947960
V-9941A
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.
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