Configuring Call Preferences
97
INBAND
DTMF digits are transmitted within the audio of the IP phone conversation. It uses the same
codec as your voice and is audible to conversation partners.
SIP INFO
DTMF digits are transmitted by the SIP INFO messages when the voice stream is established
after a successful SIP 200 OK-ACK message sequence. The SIP INFO message is sent along the
signaling path of the call. The SIP INFO message can transmit DTMF digits in three ways: DTMF,
DTMF-Relay and Telephone-Event.
DTMF parameters on the system are described below:
Parameter
Description
Configuration Method
DTMF Type
Configures the DTMF type. You can
configure it for the Cloud platform,
SIP account or SIP IP call separately.
INBAND
—DTMF digits are
transmitted in the voice band.
RFC2833
—DTMF digits are
transmitted by RTP Events
compliant to RFC2833.
SIP INFO
—DTMF digits are
transmitted by the SIP INFO
messages.
SIP INFO
—DTMF
digits are transmitted by RTP
Events compliant to RFC 2833
and the SIP INFO messages.
Default
: RFC2833.
Remote Control
Web User Interface
DTMF Info Type
Configures the DTMF info type when
DTMF type is set to SIP INFO or
SIP INFO. You can
configure it for the Cloud platform,
SIP account or SIP IP call separately
DTMF-Relay
DTMF
Telephone-Event
Default
: DTMF-Relay.
Remote Control
Web User Interface
DTMF Payload
Configures the value of DTMF
payload. You can configure it for the
Web User Interface
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