Maintenance
4-133160-A2-GB21-50 January 1997
Test Jacks
For 2-port and 4-port DSU/CSUs, six test jacks are
located on the front panel (Figure 4-1). The Mon
(Monitor) branch of the menu tree allows you to select
either EQPT (Equipment) or NET (Network).
NOTE
The single-port DSU/CSU
provides only Network Monitor In
and Network Monitor Out test
jacks. There is no Mon (Monitor)
selection in the menu tree.
The 2-port and 4-port DSU/CSU test jack functions are
shown in Figure 4-2 and described in Table 4-7.
In
Out
In
Out
In
Out
NET MON EQPT
496-1480
8
Figure 4-1. Test Jacks (Standalone DSU/CSU)
To change the Mon (Monitor) selection in 2-port and
4-port DSU/CSUs,
1. From the top-level menu, press the key until
the Ctrl selection appears on the screen.
2. Select Ctrl.
3. From the Control screen, press the
key until
the Mon selection appears on the screen.
4. Select Mon.
F1
Control:
Passwd Mon
F2
F3
5. From the Mon Jack screen, press F1 to select
EQPT (the default), or press F2 to select NET.
F1
Mon Jack: EQPT
EQPT NET
F2
F3
LINE
RECEIVER
INTERNAL
CIRCUITRY
LINE
RECEIVER
TERMINAL
EQUIPMENT
(DTE)
NETWORK
NET
Out
EQPT
In
MON
Out
NET
In
EQPT
Out
MON
In
496-14875
Mon Jack: EQPT Mon Jack: NET
Mon Jack: EQPT Mon Jack: NET
(Selectable)
(Selectable)
Figure 4-2. Test Jack Block Diagram