User Guide
DVS-21
02/2018
• V.1.0 • L. Wolle
43/131
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Professional Communication & Service GmbH • Technical changes reserved.
7.8 4ZZA
Connection module for two exchanges, analog, 4-fold, with level adjustment of the systems.
Controlling is done by a switching a control voltage on the line. The polarity distinguishes between call
and busy.
Level incoming
AF input gain (from the external device to the module)
Level outgoing
AF output attenuation (from module to external device)
Line function:
Port 1 - 4:
Line 1
<-> Call line
Polarity on the line: La/Lb =
+/-
Line 2
<-> Busy Line
Polarity on the line: La/Lb = -
/+
Display and control elements:
LEDs
GREEN - ON
Incoming connection is active
GREEN - FLASHING Outgoing connection is active
GREEN - OFF
Idle state
X
GREEN - ON
Remote station is busy
GREEN - FLASHING busy flag on
Backplane connectors:
La/Lb Line
