Cisco CP-7911G-CH1 Administration Guide - Page 253
dtmf-relay rtp-nte, dial-peer voice, sip-ua, notify telephone-event max-duration
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Integrating Voice Mail with Cisco Unified SRST How to Configure DTMF Relay for SIP Applications and Voice Mail versions provide conversion from the out-of-band SCCP digit indication to the SIP standard for DTMF relay, which is RFC 2833. You select this method in the SIP VoIP dial peer using the dtmf-relay rtp-nte command. The SIP DTMF relay method is needed in the following situations: • When SIP is used to connect a Cisco Unified SRST system to a remote SIP-based IVR or voice-mail application, such as Cisco Unity. • When SIP is used to connect a Cisco Unified SRST system to a remote SIP-PSTN voice gateway that goes through the PSTN to a voice-mail or IVR application. Note The need to use out-of-band DTMF relay conversion is limited to SCCP phones. SIP phones natively support in-band DTMF relay as specified in RFC 2833. To enable SIP DTMF relay using RFC 2833, the commands in this section must be used on both originating and terminating gateways. SUMMARY STEPS 1. dial-peer voice tag voip 2. dtmf-relay rtp-nte 3. exit 4. sip-ua 5. notify telephone-event max-duration time 6. exit DETAILED STEPS Step 1 Command or Action dial-peer voice tag voip Step 2 Example: Router(config)# dial-peer voice 2 voip dtmf-relay rtp-nte Step 3 Example: Router(config-dial-peer)# dtmf-relay rtp-nte exit Step 4 Example: Router(config-dial-peer)# exit sip-ua Example: Router(config)# sip-ua Purpose Enters dial-peer configuration mode. Forwards DTMF tones by using Real-Time Transport Protocol (RTP) with the Named Telephone Event (NTE) payload type. Exits dial-peer configuration mode. Enables SIP user-agent configuration mode. OL-13143-04 Cisco Unified SCCP and SIP SRST System Administrator Guide 253
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