Yealink SIP-T54S Administrator's Manual page 266

Administrator's Guide for SIP-T2 Series/T19(P) E2/T4 Series/T5 Series/CP860/CP920 IP Phones
account.X.phone_setting.call_appearance.transfer_via_new_linekey
Global Parameter:
phone_setting.call_appearance.transfer_via_new_linekey
Per-Line Parameter:
account.X.phone_setting.call_appearance.conference_via_new_linekey
Global Parameter:
phone_setting.call_appearance.transfer_via_new_linekey
To configure auto linekeys feature via web user interface:
Click on Features->General Information.
1.
Select Enabled from the pull-down list of Auto Linekeys.
2.
If Auto LineKeys is enabled, you can automatically assign multiple DSS keys with Line
type for a registered line on the phone.
Click Confirm to accept the change.
3.
To configure the number of line keys via web user interface:
Click Account->Advanced.
1.
Select the desired account from the pull-down list of Account.
2.
Enter the desired number in the Number of line key field.
3.
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