Implementing Cisco Advanced Call Control and Mobility Services (CLACCM) — Question 65

When a third-party SIP Phone System is dialed inbound across a Cisco Unified Border Element, DTMF is failing. The third-party vendor accepts only out-of-band DTMF. Which configuration should be added to the outgoing dial peer to resolve this issue?

Answer options

• A. dtmf-relay rtp-nte
• B. dtmf-relay cisco-rtp
• C. dtmf-relay h245-signal
• D. dtmf-relay sip-kpml

Correct answer: D

Explanation

The correct answer is D, as 'dtmf-relay sip-kpml' is designed for out-of-band DTMF signaling in SIP environments, which is what the third-party vendor requires. The other options (A, B, and C) are related to in-band or different DTMF signaling methods that do not meet the vendor's requirement.