Yealink SIP-T2 SERIES Administrator's Manual page 484

Administrator's Guide for SIP-T2 Series/T19(P) E2/T4 Series/CP860 IP Phones
features.dtmf.repetition
Description:
Configures the repetition times for the IP phone to send the end RTP Event packet
during an active call.
Web User Interface:
Features->General Information->DTMF Repetition
Phone User Interface:
None
features.dtmf.duration
Description:
Configures the duration time (in milliseconds) for DTMF .
Note: If the time interval to between two DTMF digits is less than this value, two or
more same DTMF digits could be identified as one DTMF digit. This may cause the
loss of one or more DTMF digits. For example, 2662 may be identified as 262. If so,
you can modify the value of this parameter to a little lower than the default value.
Web User Interface:
None
Phone User Interface:
None
features.dtmf.volume
Description:
Configures the frequency level of DTMF digits (in db).
Web User Interface:
None
Phone User Interface:
None
To configure the method of transmitting DTMF digits for account via web user interface
(take SIP-T23G IP phones for example):
1. Click on Account->Advanced.
2. Select the desired account from the pull-down list of Account.
3. Select the desired value from the pull-down list of DTMF Type.
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Parameters Permitted Values Default
1, 2 or 3
Integer from 0 to
100
300
Integer from -33
to 0
3
-10