Yealink T21PE2 - Call Settings Parameters

Configuration Parameters
511
Parameter sip.send_keepalive_by_socket <y0000000000xx>.cfg
Description It enables or disables the IP phone to send the keep-alive packets based on the TCP socket.
Permitted
Values
0-Disabled
1-Enabled
Default 1
Parameter sip.sdp_early_answer_or_offer <y0000000000xx>.cfg
Description
It enables or disables the IP phone to generate an SDP Offer or Answer message when receiving a reliable
provisional response or PRACK request and response.
Permitted
Values
0-Disabled
1-Enabled
Default 0
Parameter sip.reliable_protocol.timerae.enable <y0000000000xx>.cfg
Description
It enables or disables the timer for ict and nict when TCP protocol is used.
Note: This parameter can be used for fast failover purpose when TCP connection fails.
Permitted
Values
0-Disabled
1-Enabled
Default 0
Parameter sip.mac_in_ua <y0000000000xx>.cfg
Description It enables or disables the IP phone to carry the MAC address information in the User-Agent header.
Permitted
Values
0-Disabled
1-Enabled, the IP phone will carry the MAC address with colons (for example: 00:15:65:7f:fb:7e) in the
User-Agent header.
2-Enabled, the IP phone will carry the MAC address without colons (for example: 0015657ffb7e) in the
User-Agent header.
Default 0
[1]
X is the account ID. For T54S/T48S/T48G/T46S/T46G/T29G, X=1-16; for T52S/T42G/T42S, X=1-12; for T41P/T41S/T27G,
X=1-6; for T40P/T40G/T23P/T23G, X=1-3; for T21(P) E2, X=1-2; for T19(P) E2/CP920, X=1.
[2]
If you change this parameter, the IP phone will reboot to make the change take effect.
Call Settings Parameters
Parameter phone_setting.show_code403 <y0000000000xx>.cfg
Description
It configures the display message on the phone screen when receiving a 403 message.
If it is left blank, the IP phone will display the value sent from the server when receiving the 403 message.
Permitted
Values
String within 99 characters
Default Blank
Parameter phone_setting.incoming_call_when_dialing.priority <y0000000000xx>.cfg
Description It enables or disables the IP phone to interrupt the user operation when there is an incoming call.