Care and Feeding of Telex Radio Dispatch Systems
C-6200 Setup
Phase 4 Design, Inc.
Dave Grant / dgrant@hostnw.net
425.402.7308
11/5/2010 Page 7 of 18
Cross-mute
When a parallel console operator keys a microphone in the same room, the cross-mute function
mutes the receive audio path of the other parallel consoles. This prevents any unwanted audio loops
that would occur causing a loud squeal on the paralleled speakers. Feedback may be avoided by
muting the receive audio of the line card which is in parallel with a transmitting line card. This may
be accomplished by connecting pins 12 (line 1) or 6 (line 2) of each of the consoles to be cross-
muted. Pin 21 must be connected to provide a common ground and place J15 (line 1) or J14 (line 2)
into the “A” position. Note: The intercom function will not work between cross-muted consoles.
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