Data Features; Distance Limitations - AT&T Callmaster Series Reference Manual

ISDN 8510T Voice/Data Terminal

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.
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 four softkeys and four display control buttons located below 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.
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.

Distance Limitations

For DEFINITY G2, and G3, in which multipoint configuration is used, the maximum signaling dis-
tance possible from the port board to the work location jack is: (The terminating resistor should
be within 250 feet of the work location; the distances listed are applicable for up to two voice/data
terminals.)
If 24 AWG cable is used = 1600 feet
If 26 AWG cable is used = 1330 feet
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