A DTMF mismatch is occurring between an MGCP gateway registered FXS port and a Cisco Unified communications Manager SIP trunk. Which media resource can be leveraged to interwork this mismatch?

A Media Termination Point (MTP) can interwork DTMF (Dual Tone Multi-Frequency) mismatches between different call legs, such as converting DTMF signaling from out-of-band (e.g., MGCP package) to in-band (e.g., RFC 2833 for SIP) or vice-versa, allowing the two different signaling methods to communicate.

A Conference Bridge (CFB) is used for multi-party audio conferences and does not provide DTMF interworking for point-to-point calls.

An Annunciator plays tones and announcements (e.g., busy tones, instructions) but does not resolve DTMF signaling method mismatches.

A Trusted Relay Point (TRP) is a type of MTP that also performs security functions like media encryption, but its primary media interworking function related to DTMF is handled by its MTP capabilities. MTP is the more direct and general answer for DTMF interworking.