SipXcom not regonizing DTMF

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Ronald Gray

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Feb 21, 2022, 12:41:07 PMFeb 21
to sipxcom-users
I see in the pcap that the SBC is sending dtmf as RTP payload event 101.
Codec = g711u.
Sipxcom 21.01

Sipxcom is not recognizing the dtmf.

This is for VM and the system just repeats "Please enter extension.."

I added the entries to the /etc/sipxpbx/freeswitch/default_context.xml.vm files as suggested and pushed the server profile out. Still no luck.

Any assistance would be appreciated/

Matt Keys

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Feb 22, 2022, 10:24:15 PMFeb 22
to sipxcom-users
There are three major standards for DTMF interpretation: RFC-2833 (inband within RTP), RFC-2976 (out of band SIP INFO), and RFC-3265 (out of band SIP NOTIFY). The AA/IVR only supports RFC-2833 by default.
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