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MWI: Message Waiting Indicator which is used to indicate
whether there is unread new voice message.
BLF: BLF is short for Busy Lamp Field which is used to
monitor the designated extension status.
ACD: Automatic Call Distribution is often used in offices for
customer service, such as call center. The setting here is to
negotiate with the server about expire time of ACD
subscription.
To configure RTP audio video profile for DTMF and its payload
type.
Type: Support Inband, Info, RFC2833 or their combination.
How To Notify DTMF: Only available when DTMF Type is
Info.
DTMF Payload: To configure payload type for DTMF.