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Between which two DTMF relay methods does the Expressway support interworking? (Choose two.)
Correct Answer: B,E
When the Expressway is interworking a call between SIP and H.323, it also interworks the DTMF signaling, but only between RFC 2833 DTMF, and the H.245 user input indicators "dtmf" and "basicString". https://jerome.pro:8443/c/dam/en/us/td/docs/voice_ip_comm/expressway/admin_guide/Cisco- Expressway-Administrator-Guide-X12-5.pdf