Motorola MTR2000 T5544 Instruction / Field Service Manual page 195

1
DESCRIPTION
The Model CLN1204 Wireline Interface Board is described in this section. A general description, identification of
jumpers, and inputs/outputs, functional block diagrams, and functional theory of operation are provided. The
information provided is sufficient to give service personnel a functional understanding of the module, allowing
maintenance and troubleshooting to the module level. (Refer also to the Maintenance and Troubleshooting sec-
tion of this manual for detailed troubleshooting procedures for all modules in the station.)
General Description
Overview of Circuitry
Motorola Inc., 2005
All Rights Reserved
Printed in U.S.A.
WIRELINE INTERFACE
The Wireline Interface Board (WIB) serves as the interface between the
customer telephone lines and the station equipment. Each WIB contains
circuitry to interface with a variety of telephone line configurations and
signal types.
The WIB is installed behind the front panel, above the Station Control
Module within the option-card bracket, and is connected to a 96-pin Euro
connector located on the backplane of the station. The phone line connec-
tions are routed from a wire-trap terminal block mounted on the rear of the
backplane to the WIB connector.
The WIB contains the following circuitry:
• Audio and Data Circuits – the WIB provides inbound and outbound
voice and data circuits which interface with the customer phone lines
• Line Impedance Selection – jumper fields provide impedance match-
ing to satisfy several different wireline telecom specifications.
Government & Enterprise Mobility Solutions
1301 E. Algonquin Road, Schaumburg, IL 60196
4 WIRE, EURO
BOARD
MODEL CLN1204
68P81096E28-C
09/30/05-UP