Yealink SIP-T54S Administrator's Manual page 531

Enter the group call pickup code in the Group Call Pickup Code field.
3.
Click Confirm to accept the change.
4.
To configure group call pickup feature on a phone basis via web user interface:
Click on Features->Call Pickup.
1.
Select the desired value from the pull-down list of Group Call Pickup.
2.
Enter the group call pickup code in the Group Call Pickup Code field.
3.
Click Confirm to accept the change.
4.
To configure a group pickup key via phone user interface:
Press Menu->Features->DSS Keys.
1.
Select the desired DSS key.
2.
Press or , or the Switch soft key to select Key Event from the Type field.
3.
Press or , or the Switch soft key to select GPickup from the Key Type field.
4.
Press or , or the Switch soft key to select the desired line from the Account ID
5.
Configuring Basic Features
505