Yealink SIP-T2 SERIES Administrator's Manual page 485

If SIP INFO or RFC2833 + SIP INFO is selected, select the desired value from the
pull-down list of DTMF Info Type.
4. Enter the desired value in the DTMF Payload Type(96~127) field.
5. Click Confirm to accept the change.
To configure the method of transmitting DTMF digits for IP call via web user interface
(take SIP VP-T49G IP phones for example):
1. Click on Account->SIP IP Call.
2. Select the desired value from the pull-down list of DTMF Type.
3. Select the desired value from the pull-down list of DTMF Info Type.
It is configurable only if DTMF Type field is set to SIP Info or RFC2833+SIP Info.
4. Select the desired value from the pull-down list of DTMF Payload Type(96-127).
5. Click Confirm to accept the change.
To configure the number of times to send the end RTP Event packet via web user
interface:
1. Click on Features->General Information.
Configuring Basic Features
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