[on-asterisk] One Way audio - no NAT involved

[Martin Glazer]

Hi All,

I'm experiencing a problem with intermittent one way audio on some 
outbound calls. We are not using NAT at all and have an incoming T1 line 
for external connectivity. Asterisk is running on a dedicated ethernet 
network without other traffic.

I'm using about 35 Aastra SIP phones for the clients and Asterisk 1.2.23 
on the server.

Any suggestions on trying to track this down? I'm actually suspecting 
network connectivity issues but don't know how to proceed.

Any help appreciated.

Thanks

Martin

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