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Discussion in '3CX Phone System - General' started by Mbacicc, Jan 13, 2008.
What does it mean?
It doesn't recognize inputs
I guess you 3CX box trying to call some VOIP provider that cannot support DTMF using RTP payload (RFC2833).
You can see RTP payload events in wireshark. So check to see if they are there.
Basically, trace a call you used DTMF with wireshark and then
1) Statistics -> VOIP Calls
If the events are there and not being recieved, trying increasing MTU in small increments.