Isdn 7500B Data Module - AT&T MERLIN LEGEND Data Manual

Data Communications Hardware
Hardware
Features
See the Integrated Services Digital
Network (ISDN) 7500 Data Module
User's Manual for detailed information
on the features available and how they
are used for data calls.
When you use the ISDN 7500B Data Module with an MLX telephone, one end of
a D8W cord connects to the PHONE jack on the data module and the other end
of the cord connects to the LINE jack on the MLX telephone.
When you use the ISDN 7500B Data Module without an MLX telephone, you
must install a 100-ohm 440A4 terminating resistor adapter (PEC 2709-A59) on
the line near the data module.
Note: You cannot locate the data module more than 80 feet from the telephone.
You can configure the data module as a stand-alone (order a WP-90110-L1
power unit [PEC 21625]) or in a multiple-mount arrangement (order a Z77A data
mounting [PEC 21626]). The multiple-mount arrangement provides a common
power supply for up to eight data modules. Both the power unit and the data
mounting need a 115-VAC power outlet. You must order the power unit and data
mounting separately.
For synchronous operation at speeds of up to 64 kbps, order one of the
following circuit boards:
Multipurpose Enhancement Board. Provides an RS-366 Automatic Calling
Unit (ACU) interface on PORT 2 and converts the RS-232 interface on
PORT 1 on the main circuit board from asynchronous to synchronous. You
must order a V.35 adapter cable separately to operate at data rates of 56
and 64 kbps. Without the adapter cable, data rates are limited to 1200, 2400,
4800, 9600, and 19,200 bps.
High-Speed Synchronous Interface Enhancement Board. Provides a V.35
interface at synchronous data rates of 48, 56, or 64 kbps on PORT 2. A V.35
adapter cable that converts the 25-pin male connector on PORT 2 to the
industry-standard 34-pin V.35 interface is included. PORT 1 is not used.
The data module offers both asynchronous and synchronous features:
Asynchronous Features
RS-232 interface
asynchronous full-duplex operation
data rates of 300, 1200, 2400, 4800, 9600, or 19,200 bps
data options set by data terminal equipment
data options set without dropping a data call
autobaud (also called data metering or speed matching)—adjusts the
transmission speed to match the speed of the data terminal being called
auto-adjust—adjusts to the speed and parity of the data terminal equipment
used

ISDN 7500B Data Module

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