A Cisco voice gateway is configured to use a sip-kpml DTMF relay in global settings. A new SIP dial peer is configured for a third-party application that only supports an in-band DTMF relay. Which command must an engineer run on the dial peer?
he correct command that an engineer must run on the SIP dial peer to configure in-band DTMF relay for the third-party application is:
D. dtmf-relay rtp-nte
This command ensures that the in-band DTMF relay (using RTP-NTE, which stands for RTP Named Telephone Events) is used, which is supported by many SIP-based applications and devices. It allows DTMF tones to be sent over the RTP stream rather than through out-of-band signaling mechanisms like SIP INFO or KPML.
If a different type of DTMF relay such as sip-kpml is globally configured, using rtp-nte at the dial-peer level ensures that this specific dial peer will use the correct method for in-band DTMF relay
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