Table of Contents
Advertisement
LAMP
SWITCH
GND
–48V
OUT
EQPT
A
IN
Each circuit module has connectors and jacks for terminating office/equipment cables and for
cross-connecting and patching the various office/equipment units together. Cabling from office
equipment is connected to DSX-4U equipment IN/OUT connectors, and any equipment input or
output may then be connected to any other equipment input/output by means of jumpers
connected to the cross-connect connectors. Equipment inputs and outputs may also be tested or
temporarily patched to other equipment inputs and outputs by means of patch cords plugged
into the DSX-4U patch jacks.
A typical DSX-4U circuit arrangement is shown in
are connected to the IN/OUT connectors of three different DSX-4U circuit modules. Office
equipments A and B are then connected together at the DSX-4U circuit modules by temporary
patch cords. The corresponding tracer lamp (TL) terminals are also jumpered together by the
messenger cord in the cross-connect cable. Cross-connected equipments A and B can now be
identified, monitored, and tested as follows:
1. Circuit Identification - Pulling any lamp switch (LS) outward causes the tracer lamp at
each end of the corresponding cross-connect cable to flash for approximately 30 seconds
and then remain lit until the lamp switch (LS) is pushed back in. This gives a visual
indication of the equipment units that are cross-connected together.
2. Bridged Monitoring and Testing - Monitor or test equipment patched into the MON jack
of either circuit module allows testing without interrupting the signals between the A and
B equipment.
3. 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.
ADCP-80-353 • Issue 2 • August 2002 • Section 1: Description
X-O/
X-O/
X-I
MESSENGER
CORD
TL
MON
MON
OUT
OUT
IN
IN
X-OUT
X-OUT
X-IN
X-IN
Figure 1-1. Two DSX-4U Circuits
Figure
X-I
LAMP
SWITCH
GND
TL
–48V
=EQUIPMENT IN OUT CONNECTOR
= CROSS-CONNECT CONNECTOR
= PATCH JACK
= PIN JACK
1-2. Office equipments A, B, and C
© 2002, ADC Telecommunications, Inc.
OUT
EQPT
B
IN
1266-D
Page 1-3
Advertisement
Table of Contents
