Yealink SIP-T4X Administration Manual page 328

Format
Default Value
Range
Example
Parameter-
account.X.dtmf.type
Description
Format
Default Value
Range
Example
receives an UPDATE message from the
callee, and displays the identity in the From
header.
X ranges from 1 to 6.
Integer
0
0 to 2
account.1.cp_source = 0
Configuration File
<MAC>.cfg
Configures the DTMF type for account X.
If it is set to 0 (INBAND), DTMF digits are
transmitted in the voice band.
If it is set to 1 (RFC 2833), DTMF digits are
transmitted by RTP Events compliant to RFC
2833.
If it is set to 2 (SIP INFO), DTMF digits are
transmitted by the SIP INFO messages.
If it is set to 3 (AUTO or SIP INFO), the IP
phone will negotiate with the other end to
use INBAND or RFC 2833, if there is no
negotiation, using SIP INFO by default.
X ranges from 1 to 6.
Integer
1
Valid values are:
0-INBAND
1-RFC 2833
2-SIP INFO
3-AUTO or SIP INFO
account.1.dtmf.type = 1
Appendix
313