Yealink SIP-T4U Series

Call Features
410
Description
It enables or disables the Refer-To header to use the information of the Contact header in the second
200 OK message when attended transfer.
Permitted
Values
0-Disabled
1-Enabled
Default
0
Parameter
features.transfer_keep_session2_after_failed.en-
able
<y0000000000xx>.cfg
Description
It enables or disables the phone to keep the original call status after semi-attended/attended transfer
is rejected by the server.
Permitted
Values
0-Disabled
1-Enabled
Default
0
Parameter
transfer.blind_tran_on_hook_enable <y0000000000xx>.cfg
Description
It enables or disables the phone to complete the blind transfer through on-hook besides pressing the
Trans/Transfer soft key or TRAN/TRANSFER key.
Note: Blind transfer means transferring a call directly to another party without consulting.
Permitted
Values
0-Disabled
1-Enabled
Default
1
Web UI
Features > Transfer > Blind Transfer On Hook
Parameter
transfer.on_hook_trans_enable <y0000000000xx>.cfg
Description
It enables or disables the phone to complete the semi-attended/attended transfer through on-hook
besides pressing the Trans/Transfer soft key or TRAN/TRANSFER key.
Note: Semi-attended transfer means transferring a call after hearing the ringback tone; Attended trans-
fer means transferring a call with prior consulting.
Permitted
Values
0-Disabled
1-Enabled
Default
1
Web UI
Features > Transfer > Attended Transfer On Hook
Parameter
features.transfer_complete.prompt.enable <y0000000000xx>.cfg
Description
It enables or disables the phone to pop up a prompt after the transfer operation is completed.
Permitted
Values
0-Disabled
1-Enabled
Default
1
Supported
Devices
T57W, T54W, T53W, T53, T48U, T46U, T43U, T42U, T48S, T46S, T42S, T41S, T27G and CP920
[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.
Transfer Mode for Dsskey Configuration
The following table lists the parameter you can use to configure transfer mode for Dsskey.