The events for which notifications are sent out are DTMF events from the local Plain Old Telephone Service The DTMF Events Through SIP Signaling feature adds support for sending telephone-event notifications via SIP NOTIFY messagesįrom a SIP gateway. Unified CME to use a payload type other than PT97 or PT98 for DTMF.ĭTMF Events Through SIP Signaling Feature

PT98 for fax relay negotiation, or depending on whether the SIP endpoints support different payload types, configure Cisco Relay feature is also configured on this IP network, configure the voice gateways to use a payload type other than PT97 or Session Initiation Protocol (SIP) endpoints that require either transcoding or use of the RSVP Agent feature.

The RFC 2833 DTMF MTP Passthrough feature adds support for passing Dual-Tone Multifrequency (DTMF) tones transparently between Restrictions for SIP DTMF RFC 2833 DTMF MTP Passthrough Feature Use Cisco Feature Navigator to find information about platform support and Cisco software image support. To find information about the features documented in this module,Īnd to see a list of the releases in which each feature is supported, see the feature information table at the end of this For the latest caveats and feature information,īug Search Tool and the release notes for your platform and software release.

Your software release may not support all the features documented in this module.

SIP KPML-Based Out-of-Band Method (sip-kpml).

SIP NOTIFY-Based Out-of-Band Method (sip-notify).

This feature was implemented on additional platforms.įeature History for SIP INFO Method for DTMF Tone Generationįeature History for SIP NOTIFY-Based Out-of-Band DTMF Relay Supportįeature History for SIP KPML-Based Out-of-Band DTMF Relay Supportįeature History for the SIP Support for Asymmetric SDP This feature was integrated into this release. This feature was implemented on an additional platform. SIP KPML-Based Out-of-Band DTMF Relay Supportįeature History for the RFC 2833 DTMF MTP Passthroughįeature History for DTMF Events Through SIP Signalingįeature History for DTMF Relay for SIP Calls Using NTE SIP NOTIFY-Based Out-of-Band DTMF Relay Support RFC 2833 DTMF Media Termination Point (MTP) PassthroughĭTMF Relay for SIP Calls Using Named Telephone Events

This chapter describes the following SIP features that support dual-tone multifrequency (DTMF) signaling:

Dtmf voip