Your ISDN 8503T Voice Terminal
The ISDN 8503T voice terminal is comprehensively equipped so that you can make
the best use of the many features of the AT&T DEFINITY® Communications
System. Familiarize yourself with your 8503T voice terminal by looking over Figure 1
and reading the explanations on the next couple pages.
Designation card
Line jack
(on back of
voice terminal)
Handset
Call appearance
Feature buttons
Message light
Volume control button
Adjunct jack
(on back of
voice terminal)
Mute button
Program button
Dial pad/Memory
access
Conference/Ring button
Transfer/Pause button
Redial button
Memory button
Handset
cord jack
Drop/Test button
(on back of
voice terminal)
Hold button
Figure 1. ISDN 8503T Voice Terminal
1
