Avaya Communication Manager Administrator's Manual page 640

Telephone Reference
8520T ISDN-BRI telephones
The 8520T voice/data telephone offers the following: 20 call appearance/feature buttons, each
with a red and green status light, buttons for the Mute, Redial, Conference, Drop, Transfer, and
Hold features (the MUTE, SPEAKER, CONF, and TRANSFER buttons have a red light next to
them), a Speakerphone, a Volume control, and an Adjunct jack. Ten softkeys and four display
control buttons located on either side of the 7-line by 24-character display can be used to
access such features as a personal Directory, a Call Log, the Self-Test feature, and a
personalized ringing pattern for the telephone.
Figure 248: 8503D telephone
Figure notes:
1. Handset
2. Dial pad
640 Administrator Guide for Avaya Communication Manager
3. 3 programmable buttons