DTMF's repeating when calling IVR's

Telco

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#1
We have an ELX3000 with sagnoma 12 port card. I am having an issue with DTMF's repeating when you call IVR's. I have tried adding the relaxdtmf=yes but to no avail. I have also made sure the Aastra 57i's are not forcing rfc2833 out of band. The lines that are coming in are broken out of an IP T1. I have tried setting the dtmfmode to auto and to inband with no luck. Any Ideas???
 

Telco

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#2
We found the answer. When dealing lines broken out from an IP T1, make sure the carrier has the channels set right. In this case, they had set all the lines for faxes (T38) and not for voice (g711 or G729). So I had them change the lines to voice lines except for the fax line (of course). I also had them check the codec on the lines, some were set for g711 and some were set for g729 (this caused the DTMF issue). I had them set all of them for g711.

Problem solved. No DTMF issues and no odd audio issues anymore.
 

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