Pulsar TCF-10B, System Manual, Page: 215 / 249

18.1 Voice Adapter Module
Description
The Voice Adapter Module is designed to provide
voice communications between terminals of the
TC–10B/TCF–10B carrier systems. This module
also provides signaling. Voice communication is
provided on a half-duplex basis for the TC–10B,
and a full-duplex basis for the TCF–10B.
18.1.1 TC–10B Operation
The Receiver in the TC–10B system outputs 5.02
MHz IF to the Voice Adapter, which is then
filtered, AGC amplified, and detected. The
detected audio is then amplified and received at
the handset. You can connect the handset (with a
“push-to-talk” switch) to the TC–10B in three
different ways:
1. Plug the handset into the TC–10B Voice
Adapter Module at the front panel
“HANDSET” jack.
2. Connect the handset remotely, through a jack,
to the TC–10B rear panel (terminal TB5).
3. Connect the hookswitch assembly (which
supports a handset) remotely to the TC–10B
rear panel (terminal TB5).
You initiate signaling by pressing the push-to-talk
switch on the handset. You may terminate ringing,
at the other end of the system, in four different
ways (depending on the configuration you are
using):
1. When a handset is plugged into the TC–10B
Voice Adapter Module front panel
“HANDSET” jack, it activates the alarm
cutoff relay.
2. When a handset is connected, remotely,
through a jack to the TC–10B rear panel (see
Figure 18-4), the remote jack interrupts the
alarm circuit.
3. When a handset is removed from its hook-
switch; the hookswitch assembly being
connected remotely to the TC–10B rear panel
(see Figure 18-4), the hookswitch contacts
interrupt the alarm circuit.
4. When a handset is used in combination with a
hookswitch, lifting the handset and plugging
in the handset interrupts the alarm circuit (see
Figure 18-4).
When using the TC–10B with voice, refer to
Figure 18-5 for the alarm cutoff circuit.
18.1.2 TCF–10B Operation
In the TCF–10B system, the receiver outputs 5.02
MHz IF to the Voice Adapter, which is then
filtered, AGC amplified, and detected. The
detected audio is then amplified and received at
the handset. You can connect the handset to the
TCF–10B in the following ways (a hookswitch
assembly is required for remote TCF–10B
operation):
Copyright © 1997 Pulsar Technologies, Inc.
Chapter 18. Optional Voice Adapter Module
18
Schematic 1606C39-16
Parts List 1606C39-16