Yealink SIP-T4U Series

Advanced Features
456
Devices
Parameter
account.X.shared_line.idle_details
[1]
<y0000000000xx>.cfg
Description
It enables or disables the phone to display the basic SCA call information on the idle screen.
Note: It works only if “account.X.shared_line” is set to 1 (Shared Call Appearance).
Permitted
Values
0-Disabled
1-Enabled, users can also view the call details by long pressing the SCA line key.
Default
0
Supported
Devices
T57W, T54W, T53W, T53, T48U, T46U, T43U, T42U, T48S, T46S, T42S, T41S and T27G
[1]
X is the account ID. For T57W/T54W/T48U/T48S/T48G/T46U/T46S/T46G/T29G, X=1-16; for
T53W/T53/T43U/T42G/T42U/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.
Bridge Lines Appearance (BLA)
BLA allows users to share a SIP line on two or more phones. Users can monitor the specific extension (BLA num-
ber) for status changes on each IP phone. To use this feature, a BLA group should be pre-configured on the server
and one of them is specified as a BLA number.
Yealink phones support BLA using a SUBSCRIBE/NOTIFY mechanism as specified in RFC 3265. The event used
is: “dialog” for bridged line appearance subscribe and notify.
Topic
BLA Configuration
BLA Configuration
The following table lists the parameters you can use to configure BLA.
Parameter
account.X.shared_line
[1]
<MAC>.cfg
Description
It configures the registration line type.
Permitted
Values
0-Disabled
3-Draft BLA
Default
0
Web UI
Account > Advanced > Shared Line
Parameter
account.X.bla_number
[1]
<MAC>.cfg
Description
It configures the BLA number.
Note: It works only if “account.X.shared_line” is set to 3 (Draft BLA).
Permitted
Values
String within 99 characters
Default
Blank
Web UI
Account > Advanced > BLA Number
Parameter
account.X.bla.notify_with_expire.enable
[1]
<MAC>.cfg
Description
It enables or disables the phone to add the Expires attribute to the Subscription-State header of the
BLA NOTIFY message.
Note: It works only if “account.X.shared_line” is set to 3 (Draft BLA). For teltronnic BLA, you need to set