Direct line appearances on Linksys 942 phones

New to Freepbx and looking to see how to setup direct co line keys on Linksys 942 phones. Need to know how to set that up or program so the system is set up like a key system.
Any assistance would be great.
Thanks.
Tom

The system is a PBX and doesn’t support shared line appearances, it doesn’t work like you want it to.