Bill,
If I turn off crtp, everything works fine. Thanks, Tapan From: Bill Lake [mailto:whl...@gmail.com] Sent: Tuesday, June 12, 2012 11:29 AM To: Krishna Cc: Dan Quinlan (daquinla); Tapan Gautam (tgautam); ccie_voice@onlinestudylist.com Subject: Re: [OSL | CCIE_Voice] DTMF from BR1 phone to CUC via SIP trunk notrecognized properly Might want to read this as it is the authority on RFC 2833 and it appears to be out of band however it uses the RTP header. It also appears that the tones are actually carried in the RTP traffic just not the audio stream. http://www.ietf.org/rfc/rfc2833.txt Would it be interesting to see if cRTP was turned off if DTMF would work in this case? On Tue, Jun 12, 2012 at 7:58 AM, Krishna <vinayak_...@yahoo.com> wrote: Dan, A small correction to your statement..rfc2833 is out of band mechanism mostly, and moreover it doesn't use audio channel, infact it uses rtp header to relay the dtmf message with a payload identifier. thank you Krishna.. ________________________________ From: Dan Quinlan (daquinla) <daqui...@cisco.com> To: Tapan Gautam (tgautam) <tgau...@cisco.com> Cc: ccie_voice@onlinestudylist.com Sent: Monday, June 11, 2012 11:57 PM Subject: Re: [OSL | CCIE_Voice] DTMF from BR1 phone to CUC via SIP trunk notrecognized properly cRTP mangles in-band (audio) DTMF. If I understand correctly, you are SIP-integrated between CUC and UCM. You need to be OOB only for DTMF (not rfc2833). Rfc2833 is an in-band (audio channel) mechanism. You need OOB (signaling channel) for DTMF to function when cRTP is used. DQ d...@cisco.com Sent from my iPhone On Jun 11, 2012, at 11:33 PM, "Tapan Gautam (tgautam)" <tgau...@cisco.com> wrote: Hey Guys, When I call CUC pilot from BR1 phone, the dtmf tones are not recognized properly by CUC, i.e. BR1 phone cannot login to mailbox or select any other option via DTMF. If I remove crtp, everything works fine. Topology: SCCP phone(BR1 site) à g729r8 with crtp à CUCM à SIP trunk(with OOB and RFC2833 as dtmf options) à CUC Things I have tried so far, 1) All dtmf options in SIP trunk. 2) Enabled mtp option 3) In CUC, changed codec type to just g711u, just g729 and both(which is the default). I found other posts on this issue but none of them has the solution. Thanks, Tapan _______________________________________________ For more information regarding industry leading CCIE Lab training, please visit www.ipexpert.com Are you a CCNP or CCIE and looking for a job? Check out www.PlatinumPlacement.com _______________________________________________ For more information regarding industry leading CCIE Lab training, please visit www.ipexpert.com Are you a CCNP or CCIE and looking for a job? Check out www.PlatinumPlacement.com _______________________________________________ For more information regarding industry leading CCIE Lab training, please visit www.ipexpert.com Are you a CCNP or CCIE and looking for a job? Check out www.PlatinumPlacement.com
_______________________________________________ For more information regarding industry leading CCIE Lab training, please visit www.ipexpert.com Are you a CCNP or CCIE and looking for a job? Check out www.PlatinumPlacement.com
