Valcom V9941A User Manual
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VSP-V-9941A
Issue 4
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 talkpath 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