Yealink SIP-T4U Series

Administrator’s Guide for SIP-T2 Series/T4 Series/T5 Series/CP920 IP Phones
528
Values 1-Enabled
Default
0
Parameter
account.X.custom_ua
[1]
<MAC>.cfg
Description
It configures the suffix of User-Agent in SIP request messages from the phone.
Permitted
Values
String within 256 characters
Default
Blank
Parameter
account.X.call_id_mode
[1]
<MAC>.cfg
Description
It configures the constitution of caller ID.
Permitted
Values
0-Use random digits
1–Use the combination of the digits and letters
2–Use random digits plus MAC address
Default
0
Parameter
account.X.path.enable
[1]
<MAC>.cfg
Description
It enables or disables the phone to carry the Supported:path header in the REGISTER request mes-
sage.
Permitted
Values
0-Disabled
1-Enabled
Default
0
Parameter
account.X.insert_outbound_in_route.enable
[1]
<MAC>.cfg
Description
It enables or disables the phone to add outbound server address as the topmost Route header in the
request message.
Note: It works only if the received 200 OK response for the REGISTER request contains the Service
route header.
Permitted
Values
0-Disabled
1-Enabled
Default
0
Parameter
account.X.invite_with_rpid_header.enable
[1]
<MAC>.cfg
Description
It enables or disables the phone to add the Remote-Party-ID (RPID) header in the initial INVITE mes-
sage.
Permitted
Values
0-Disabled
1-Enabled
Default
0
Supported
Devices
All phones except T48G, T46G, T42G, T41P and T29G
Parameter
account.X.third_part_request_with_route.enable
[1]
<MAC>.cfg
Description
It enables or disables the phone to carry the Route header in the request message which is sent to
the third-party server (for example, a Music On Hold server).
Note: It works only if the received 200 OK response for the REGISTER request contains the Service
route header.
Permitted
0-Disabled