[OpenSIPStack] Dtmf Detection (RFC 2833) in OpenSBC

[Gaurav K. <gkh...@is...>]

Hello,

 

I'm facing an issue with RTP on OpenSBC 1.1.4 in capturing RFC 2833 packets.
My network configuration is:-

 

Xlite UA (Outbound) (.64) <--------> OpenSBC (.115) <-----------> Xlite UA
(Inbound) (.60)

 

* Outbound UA is registered on OpenSBC

* Inbound UA is registered on OpenSBC

* A route exists from OpenSBC to Xlite UA (Inbound) (.60)

 

RTP_Session::SendReceiveStatus RTP_Session::OnReceiveData(const
RTP_DataFrame & frame) is the function where all rtp packets get processed.

 

The source file rfc2833.cxx has the function
OpalRFC2833Proto::ReceivedPacket() which seems to be there for receiving an
RFC2833 packet but I could not find a reference from where it's being
invoked. Is this a bug in OpenSBC?

 

Attached are the level 5 logs for inbound and outbound call where both UAs
tried to send & receive DTMF as RFC 2833 packets.

 

I'll be thankful for any guidance on what's going wrong.

 

Regards,
Gaurav