Between which two DTMF relay methods does the Expressway support interworking? (Choose two.)

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Between which two DTMF relay methods does the Expressway support interworking? (Choose two.)
A . unsolicited notify
B . RFC 2833
C . KPML
D . passthrough
F . 245 user input indication

Answer: BE

Explanation:

Reference: https://www.cisco.com/c/dam/en/us/td/docs/voice_ip_comm/expressway/admin_guide/Cisco-Expressway-Administrator-Guide-X12-6.pdf

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