david.j as wrote:
<snip>

problems.  They tell me that I need to disable silence suppression on
the IP-500 because Asterisk won't support it and either Asterisk or
the MG thinks the call is dropped in abstence of RTP packets.

However I can't find any reference to this in the Polycom manual. Does anyone know how to turn VAD/Silence suppression on the Polycom -- or if it even supports it? Is there a work around with Asterisk?
We have it disabled here. It is in the ipmid.cfg file. Open up your ipmid.cfg file and do a search for VAD. We have a line like this:

<VAD voice.vadEnable="0" voice.vadThresh="15"/>

To be more specific, look in your ipmid.cfg under the <voice> section. That is where you should find it. Most likely, voice.vadEnable="1" in your installation. Change this to 0, save the file, and reboot the phones. If VAD (Voice Activity Detetion) is indeed the cause of your problem, it should go away after updating the config and rebooting.

         Jeremy

--
Jeremy Gault, KD4NED    <[EMAIL PROTECTED]>
Network Administrator, WinWorld Corporation
Member: Bradley County ACS/RACES/SkyWarn
voice: +1.423.473.8084  fax: +1.423.472.9465
fwd: 461771             msn msgr: [EMAIL PROTECTED]

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