Yealink SIP-T2 SERIES Administrator's Manual page 481

Details of Configuration Parameters:
Parameters
account.X.dtmf.type
Description:
Configures the DTMF type for account X.
0-INBAND
1-RFC 2833
2-SIP INFO
3-RFC2833 + SIP INFO
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 (RFC2833 + SIP INFO), DTMF digits are transmitted by RTP Events
compliant to RFC 2833 and the SIP INFO messages.
X ranges from 1 to 16 (for SIP VP-T49G/SIP-T48G/T46G/T29G)
X ranges from 1 to 12 (for SIP-T42G)
X ranges from 1 to 6 (for SIP-T41P/T27P)
X ranges from 1 to 3 (for SIP-T40P/T23P/T23G)
X ranges from 1 to 2 (for SIP-T21(P) E2)
X is equal to 1 (for SIP-T19(P) E2/CP860)
Web User Interface:
Account->Advanced->DTMF Type
Phone User Interface:
None
account.17.dtmf.type
Description:
Configures the DTMF type for IP call.
0-INBAND
1-RFC 2833
2-SIP INFO
3-RFC2833 + SIP INFO
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
Configuring Basic Features
Permitted Values Default
0, 1, 2 or 3
0, 1, 2 or 3
1
1
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