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ISDN 8520T Voice/Data Terminal
Color
The 8520T is available in AT&T black or AT&T white.
Data Features
Asynchronous full-duplex operation at data rates from 1200 bits per second (bps) to 57.6
kilobits per second (kbps) through an EIA-232 interface.
X.25 packet switched data communication including receipt of X.29 commands from a
remote X.25 host for setting packet switched data parameters.
Circuit switched data communication over 56 or 64 kbps facilities via industry standard
V.120 rate adaption protocol.
Circuit switched data communication over 64 kbps facilities via AT&T’s Digital Multiplexed
Interface (DMI) Mode 2 or Mode 3 rate adaption protocols.
API allows a PC to control all aspects of the set‘s interaction with the user and with the
network.
The 10 softkeys and four display control buttons located to the left and right of the liquid
crystal display can be used to access data features such as view current options, change
options, answer a data call, place a data call, reset a locked data set, and selecting to
display a data indicator. Note, the first two lines of the 7-line display contain switch infor-
mation; the remaining five lines contain softkey information.
A user-friendly command interface with on-screen help, nine programmable named data
memory numbers, and four programmable data option profiles.
An expanded Hayes AT command set interface for compatibility with applications which
require this command format.
Remote and local loopback tests.
For more information about the data features on an 8500-Series terminal, see the
ISDN 8500
Series Display Terminal ADM User’s Manual
, 555-021-730.
3-438