When DTMF is transmitted across a PRI, is it sent inband across the B channel as part of the voice call, or is it sent out of band across the D channel?
Thanks Dave. Don't tell the Cisco guys this, but it isn't plugged into a Cisco gateway, which is limiting my troubleshooting capabilities, but it's the customer requirement. But, this will certainly help point to where they need to make corrections.
I hope this is helpful, you can download a graphical PRI debugger that parses q931 debugs at pippinsoftware.com It's demo, just 10 channels, since they are still in beta testing. Could be useful for general debugging.
The full version of this is out now and it's very inexpensive.
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