A user has reported that keys that are pressed when accessing Cisco Unity Express are not being acknowledged by the system. This configuration is found on the voice-enabled IOS router:

dial-peer voice 6800 voipdestination-pattern 5...session protocol sipv2session target ipv4:10.3.6.127codec g711ulawno vad What is the configuration command that is needed to complete the configuration and solve the problem?

Question

A user has reported that keys that are pressed when accessing Cisco Unity Express are not being acknowledged by the system. This configuration is found on the voice-enabled IOS router:

dial-peer voice 6800 voipdestination-pattern 5...session protocol sipv2session target ipv4:10.3.6.127codec g711ulawno vad What is the configuration command that is needed to complete the configuration and solve the problem?

Accepted Answer

A. dtmf-relay sip-notify Cisco Unity Express communicates over SIP and expects DTMF digits delivered via SIP NOTIFY messages. Adding 'dtmf-relay sip-notify' to the dial-peer tells the IOS router to send key presses out-of-band using SIP NOTIFY, which is the method CUE is designed to receive and acknowledge.

Answer

B. dtmf-relay rtp-nte dtmf-relay rtp-nte (RFC 2833) transmits DTMF over RTP Named Telephony Events, which Cisco Unity Express does not support as its in-band DTMF detection method on SIP dial-peers.

Answer

C. dtmf-relay cisco-rtp dtmf-relay cisco-rtp is a Cisco-proprietary RTP extension not recognized or supported by Cisco Unity Express for DTMF signaling.

Answer

D. dtmf-relay h245-signal dtmf-relay h245-signal is specific to H.323 call signaling and cannot be used on a dial-peer configured with session protocol sipv2.

A user has reported that keys that are pressed when accessing Cisco Unity Express are not being acknowledged by the system. This configuration is found on the voice-enabled IOS router: dial-peer…

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