Multi-Channel Data System - Nortel QMT7 ADM Manual

There are presently three basic versions available:
• The Meridian 1/74 Protocol Converter is an ASCII to SNA/SDLC
(PU type 2) device that emulate the IBM 3274 and 3276 controllers.
• The Meridian 1/71 Protocol Converter is an ASCII to BISYNC device
that emulates the IBM BSC 3274 controller.
• The Meridian 1/50 Protocol Converter (also called System 36 Gateway)
is a device that emulates ASCII to SNA/SDLC for IBM System 34, 36,
or 38.
A detailed Technical Reference Manual, an Operator's Guide and a User's
Quick Reference Guide are available for each member of the family. These
documents provide information for ordering, installation, operation,
maintenance, troubleshooting, debugging, and diagnostics.
These manuals also provide a partial list of the ASCII terminals and printers
that are supported, plus cross-reference sheets of keyboard emulations for
those terminals.

Multi-Channel Data System

The MCDS is designed for use in computer rooms to provide rack mounted
ADM-like asynchronous capabilities for interfacing multiple computer ports
to the system. It consists of a shelf, power supply, a maximum of eight
interface cards, backplane, patch panel (optional), and cabinet (optional).
The interface between the MCDS and the computer ports must conform to the
EIA RS-232-B/C specifications.
Incoming Asynchronous calls to the MCDS may originate from QMT7,
QMT9, or asynchronous QMT8s that use full/half duplex mode of operation
and operate with data speeds of 110, 150, 300, 600, 1200, 2400, 4800, 9600,
and 19200 bps. The MCDS interface card (AC) only supports data terminals
that use 7-bit ASCII or 8-bit EBCDIC code 1 or 2 stop bits with odd or even
or no parity.
Equipment description
Meridian Data Services
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Description