For others who may not know, 'duck' is used in xaiper, and the telemetry voice 'ducks' under the audio of the repeater user, by dropping the telemetry voice level by half (or as defined).

-Geoff/W5OMR

March 21, 2011

Kevin,

Thanks for calling. I'm glad I got your input to add the setting for the
nominal, non-busy channel announce volume in addition to the busy
channel announce volume.

With the new software, the following values can be entered for a
repeater context in /etc/asterisk/rpt.conf.

telemnomdb = Telemetry Nominal dB volume adjustment. This is the number
of dB to adjust the telemetry volume when the channel is not keyed by a
local or remote received signal.
Example: telemnomdb=-3
Default: telemnomdb=0

telemduckdb = Telemetry Duck dB volume adjustment. This is the number of
dB to adjust the telemetry volume when the channel is keyed by a local
or remote received signal.
Example: telemduckdb=-10
Default: telemduckdb=0

I'm ready to load this on a test repeater whenever you have one ready.
After good results, I'll make this change to the install sources.

I'll also have the update script handle the case of locally modified
sources a little better.

73,
Steve, W9SH