ADCP-80-353 • Issue 2 • August 2002 • Section 1: Description
Page 1-3
©
2002, ADC Telecommunications, Inc.
Figure 1-1. Two DSX-4U Circuits
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
Office equipments A, B, and C
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.
1266-D
X-O/
X-I
OUT
MON
IN
X-O/
X-I
GND
–48V
LAMP
SWITCH
LAMP
SWITCH
GND
TL
TL
–48V
MESSENGER
CORD
EQPT
B
MON
OUT
IN
EQPT
A
X-IN
X-OUT
X-IN
X-OUT
OUT
IN
OUT
IN
=EQUIPMENT IN OUT CONNECTOR
= CROSS-CONNECT CONNECTOR
= PATCH JACK
= PIN JACK
