[cisco-voip] One Way Voice - MGCP - CMM

[Jeff Rosowski]

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> I am just starting to look into rampant reports of random one way voice.
> I have 7 PRI's so trying to pin down the similarities between the calls
> that experience this will be fun!  Anyway, at first glance it doesn't
> appear to be any single PRI, any single subnet, any single phone, etc.
> Its just random which is why it is tough to nail down.  I looked through
> the bug toolkit on the CMM and couldn't find anything.  Only thing I have
> checked is the voice rtp send-rcv command was in place.  Any thoughts?

We ran into this problem.  The problem was that parts of the CMM did 
routing (even though they shouldn't) and parts of the CMM did not.  So 
because of this you ended up having an odd situation where you had to 
specify both a default gateway, and a default route.  Without the default 
gateway you couldn't access the CMM at all, but without the default route 
you had one way audio.

They probably have updated the software since then, so I'd suggest 
upgrading and if that doesn't fix it, try the above.
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