Motorola MTR2000 T5544 Instruction / Field Service Manual page 204

1
DESCRIPTION
The Model CLN1203 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.)
Note
General Description
Overview of Circuitry
Motorola Inc., 2005
All Rights Reserved
Printed in U.S.A.
Some station operational features associated this board may not be sup-
ported by the MTR2000 station at this time. Refer to the Summary of Op-
erational Features, in the Description section, for a list of all currently
available features.
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 600 Ω impedance telephone line configuration
with various 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 a number of voice and
data circuits which interface with the customer phone lines
Government & Enterprise Mobility Solutions
1301 E. Algonquin Road, Schaumburg, IL 60196
4 WIRE, WIRELINE
INTERFACE BOARD
MODEL CLN1203
68P81096E29-F
09/30/05-UP