Yealink VC400 Administrator's Manual page 151

Click Confirm to accept the change.
4.
To configure DTMF type for SIP IP call via web user interface:
Click on Account->SIP IP Call.
1.
Select the desired value from the pull-down list of DTMF Type.
2.
If SIP INFO or RFC2833+ SIP INFO is selected, select the desired value from the
pull-down list of DTMF Info Type.
Enter the desired value in the DTMF Payload Type(96~127) field.
3.
Click Confirm to accept the change.
4.
DTMF parameters for H.323 protocol on the system are described below:
Parameter
Configures the DTMF type. You can
configure it for the StarLeaf Cloud
platform or H.323 call separately.

DTMF Type

Default: Auto
To configure DTMF type for StarLeaf Cloud platform via web user interface:
Click on Account->Cloud.
1.
Select StarLeaf from the pull-down list of Platform Type.
2.
Description
INBAND—DTMF digits are
transmitted in the voice band.
Auto—the system
automatically negotiates the
way (INBAND, RFC2833 or SIP
INFO) to transfer DTMF digits.
Configuring Call Preferences
Configuration Method
Remote Control
Web User Interface
135