Yealink SIP-T23, Provisioning Manual

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Yealink IP Phones Auto Provisioning Guide
276
Parameter
Permitted
Values
Descriptions Web Setting Path
The default value is 1800.
account.X.session_timer.refresher
(X ranges from 1 to 3)
0 or 1
It configures the refresher of the session timer
for account X.
0-Uac (Refreshing the session is performed by
the IP phone).
1-Uas (Refreshing the session is performed by
a SIP server).
The default value is 0.
Account->Advanced->Session
Refresher
account.X.enable_user_equal_phone
(X ranges from 1 to 3)
0 or 1
It enables or disables the "userphone" carried
in the INVITE message for account X.
0-Disabled
1-Enabled
The default value is 0.
Account->Advanced->Send
user=phone
account.X.srtp_encryption
(X ranges from 1 to 3)
0, 1 or 2
It configures whether to use voice encryption
service for account X.
0-Disabled
1-Optional
2-Compulsory
If it is set to 1 (Optional), the IP phone will
negotiate with the other IP phone what type
Account->Advanced->RTP Encryption
(SRTP)