ADC DSX-3 User Manual page 13

ADCP-80-314 • Issue 6 • January 2001 • Section 1: Description and Application
• Split-Circuit Testing - Test equipment patched into an IN or OUT jack splits the A-to-B
equipment circuit for direct access testing of either equipment unit.
In addition, patch cables can be used to split cross-connected equipment units, and connect
either of the two units to a third unit. In
equipment C.
As seen in
which are established permanently or temporarily at the centrally located cross-connect
system. As a result, many benefits can be immediately realized as described in the following
applications.
Note: The Operation Section of this manual provides schematic diagrams and step-by-
step procedures for most of the functions performed at the cross-connect system.
EQPT
A
EQPT
C
Page 1-4
 2001, ADC Telecommunications, Inc.
Figure 1-2, numerous testing and patch-around configurations are possible, all of
LAMP
SWITCH
GND
TL
–48V
OUT
IN
LAMP
SWITCH
GND
TL
–48V
OUT
IN
Figure 1-2. Typical DSX-3 (DSX-4H-24) Circuit Arrangement
Figure 1-2, equipment B is temporarily patched to
X-O/ X-O/
X-I
X-I
MESSENGER
CORD
PERMANENT
CROSS-CONNECT
CABLES
X-IN X-IN
X-OUT X-OUT
MON MON
OUT OUT
IN
IN
X-IN
X-OUT
MON
OUT
IN
LAMP
SWITCH
GND
TL
–48V
OUT
EQPT
B
IN
=EQUIPMENT IN OUT CONNECTOR
= CROSS-CONNECT CONNECTOR
= PATCH JACK
= PIN JACK
1267-C