Yealink SIP-T2 SERIES Administrator's Manual page 594

Administrator's Guide for SIP-T2 Series/T19(P) E2/T4 Series/CP860 IP Phones
Click on Advanced, select Shared Call Appearance from the pull-down list of Shared
2.
Line.
Enter the desired number in the Number of line key field.
3.
This field appears only if Auto Linekeys is enabled.
The default value is 1. In this example, the value is set to 2.
Click Confirm to accept the change.
4.
To configure the call pull feature access code via web user interface:
Click on Account->Advanced.
1.
Select the desired account from the pull-down list of Account.
2.
570