System Telephones - AT&T PARTNER Installation And Use Manual

Learning About Telephones
This chapter explains how system and standard phones work with the system,
as well as combination extensions where more than one phone or auxiliary
device is installed. System phones are described first, followed by standard
phones on page 3-7 and combination extensions on 3-9.

System Telephones

System phones have some buttons and indicators in common. The following
pages explain where they are and how they work.
3
Learning About Telephones 3-1