CUBE - DTMF Interworking between SIP INFO and RFC2833

[cgeorgia4]

Hi all,

After some testing I noticed that when the cube receives dtmf via SIP INFO it doesn't translate them into rfc2833 on the other side. This happens when the incoming INVITE advertises both SIP INFO and RFC2833.

When the incoming INVITE advertises only SIP INFO then it does the translation to RFC2833 and sends the digits via RTP on the outgoing interface.

CUBE supports both RFC2833 and SIP INFO as it advertises both methods in it's sip messages. Is this the expected behaviour ?

IOS is 15.1(3)T1. CUBE is running on a 3945 router.

I have found bug CSCuh65102 which seems to be a match. Can somebody confirm this ?

[Manish Gogna · Accepted solution]

Hi,

Please check the following bug

https://tools.cisco.com/bugsearch/bug/CSCtj93573/?reffering_site=dumpcr

CUBE not processing DTMF SIP INFO to RFC 2833 upstream to Network

You can try an upgrade to 15.1(3)T4 or higher and check if the issue is resolved.

HTH

Manish

[cgeorgia4]

Indeed upgrading to 15.2(3)T2 seems to have resolved it

Thanks for the quirk reply Manish much appreciated

Regards