EXACOM
VCR-2020
Copyright 1991, 92, 93, 94, 95, 96 all rights reserved by EXACOM, Inc.
19
4.32.3 Powering the VCR-2020 Console
❏
If communications cable length exceeds maximum allowable length for wire
gauge used (please refer to Appendix A) an external power supply will need
to be connected to the jack on the rear of the console labeled EXT. PWR.
(please refer to Appendix A for EXT PWR specifications).
4.32.2 Speaker Configuration
❏
If the VCR-1776 speaker or headset jacks are to be implemented positions 8
and 9 on the terminal block must be connected to each other. The unit is
shipped from the factory with this installed. If the headset jacks are used the
console speaker will be automatically disabled.
❏
If an external speaker is to be used, remove the jumper between position 8 &
9, and connect the speaker to positions 9 and 10 on the terminal block.
4.32.3 Record Inputs
Two separate inputs are available, each providing a high impedance differential
input suitable for connection directly to telephone lines. These are combined
internally to the single recording channel. When the second input (positions 3
& 4 on the terminal block, or the second line on the RJ11 jack) is not used, a 1K
Ohm resistor should be connected between terminal block positions 3 & 4 to
minimize possible noise pickup.
4.32.4 Record Activation Methods
❏
Choose one of the following methods to detect and record phone calls and/or
radio transmissions.
A) Voltage Level Start
B) External Source Start
C) Loop Current Start
D) Bridging Across Headset
E) Radio (through relay closure)
F) VOR / VOX
Note: The following sections describe each method in detail. Not every method
will be appropriate in every case.
