MTP Preferred Originating CodecRequired Field: g711ulawĭTMF Signaling MethodRequired Field: No preference Media Termination Point Required (Checked) Sccp ccm 3.3.3.3 identifier 1 version 7.0Īssociate profile 1 register BR2-IOS-XCODE To: DTMF Issue with SIP TRUNK (CUCM - SIP Trunk- CUCME CUE.įax protocol t38 version 0 ls-redundancy 0 hs-redundancy 0 fallback none Try changing the DTMF Signaling Method to 'OOB and RFC 2833'.įrom: cisco-voip On Behalf Of vignesh sethuraman When SIP is used to connect a Cisco SRST system to a remote SIP-PSTN voice gateway that goes through the PSTN to a voice-mail or IVR application.What do you see getting negotiated for DTMF on the CUCM side? You might want to try forcing out-of-band on the CUCM side.

When SIP is used to connect a Cisco SRST system to a remote SIP-based IVR or voice-mail application, such as Cisco Unity.The SIP DTMF relay method is needed in the following situations: You select this method in the SIP VoIP dial peer using the dtmf-relay rtp-nte command. To enable SCCP phones to send digit information to remote SIP-based IVR and voice-mail applications, Cisco SRST 3.2 and later versions provide conversion from the out-of-band SCCP digit indication to the SIP standard for DTMF relay, which is RFC 2833. DTMF Relay Using SIP Notify (Nonstandard)Ĭisco Skinny Client Control Protocol (SCCP) phones, such as those used with Cisco SRST systems, provide only out-of-band DTMF digit indications.DTMF Relay for SIP Applications and Voice MailĭTMF Relay for SIP Applications and Voice MailĭTMF relay for SIP applications can be used in two voice-mail situations:.Note The Cisco IOS Voice Configuration Library includes a standard library preface, glossary, and feature and troubleshooting documents and is located at.

Cisco dtmf