User's Manual

EX7100 Technical Manual - Module Descriptions
©1999 Exicom Technologies (1996) Ltd 7-57 Issue 3 - May 2001
7.11 Modem/Controller Module Type 2966
7.11.1 General
The Modem/Controller module provides the bulk of the EX7100 terminal’s control and
data conversion functionality. Incoming line data to the terminal is converted to a format
suitable for transmission over the link and output to the transmitter module. Similarly, data
from the receiver is converted from the transmission format to the line format appearing
at the rear panel.
This module also contains the master controller for the EX7100. This controls the Front
Panel module and manages the microcontrollers that are present on many of the other
modules. A Rear Panel Data Connector PCB connects the Modem/Controller PCB to the
external world.
Modem/Controller
Module
Rear Panel
Data
Connector
PCB
64k Data &
Clocks
I/O Port
Ribbon
Connector From
Modem Controller
Control
LMS
64kbps Data
Control
LMS
I/O
Front Panel
Module
RX&TX
64k Data
Module
Comms
Bus
Rear Panel
Connectors
Ribbon
Connector From
Modem Controller
Figure 7.28: Modem/Controller Block Diagram
Figure 7.29: Modem/Controller in Place within Terminal