For a phone call going out of Call Manager on SIP trunks to SIP endpoints in CM 4.X version, MTP is required for call termination and for becoming RFC 2833 compliant. Which of the following is Not a…

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• AStandard for SIP DTMF is based on RFC2833 which uses in-band payload types to indicate
• BRFC 2833 defines a dynamic payload type for DTMF tones.
• CBy making SIP calls use MTP, DTMF relay between in-band and out-of-band digits are
• DThis payload type is fixed and not negotiated between CallManager and SIP endpoints via the
• EThis payload type is configurable in Service Parameter as

• A
  5% (2)
• B
  8% (3)
• C
  3% (1)
• D
  84% (32)

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