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ISDN 7507 Display Terminal
ISDN 8503T Voice Terminal
The 8503T voice terminal is a non-modular set used with the Integrated Services Digital Network
(ISDN) communication system through a 4-wire ‘‘T’’-interface. This voice terminal offers the fol-
lowing: 4 standard fixed feature buttons, a Message light, three call appearance/flexible feature
buttons, each with a red and green light, 12 programmable memory-dialing locations on the dial
pad keys, a PROGRAM button for storing numbers at the memory-dialing locations and a
MEMORY button for dialing these programmed numbers or codes, the Redial feature, the Mute
feature, eight possible personalized ringing patterns selected with the Select Ring feature, high
fidelity audio capabilities (bandwidth from .3 to 3.8 kHz) with the K-type handset, and touch-tone
dialing. This set does not provide data capabilities.
Applications
The 8503T voice terminal can be used with the DEFINITY G2 and G3. Typical applications of the
8503T voice terminal are users handling a low volume of voice-only calls, staff workers and lower
level managers, as well as lobbies and conference rooms.
Physical Description
Dimensions
Note: The dimensions given here for the 8503T voice terminal are approximate.
Width = 7 3/4 inches
Depth (front to back) = 9 1/2 inches
Height (maximum with handset in place)
The desk-mounted model = 5 1/4 inches
The wall-mounted model = 4 1/2 inches
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