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ACCULINK 336x E1 NTU
4-14 December 1996 3360-A2-GB20-20
Test Jacks
Six test jacks are located on the front panel
(Figure 4-1). These test jacks allow for four break-in tests
and two monitor access points to the E1 NTU.
Test jack functions are shown in Figure 4-2 and
described in Table 4-8.
Lp1
Lp2
In
Out
In
Out
HDSL
NET
E1
LINE
E1
MON
495-1475
3
Figure 4-1. E1 NTU Test Jacks
LINE
INTERFACE
NTU
CIRCUITRY
LINE
INTERFACE
TERMINAL
EQUIPMENT
(DTE)
HDSL
NETWORK
E1
LINE
Out
E1
MON
Out
HDSL
NET
Lp1
E1
LINE
In
E1
MON
In
495-14754
Port 1
Port 2
Port 3
Port 4
HDSL
NET
Lp2
Figure 4-2. Test Jack Block Diagram
Table 4-8
Test Jack Functions
Test Jack Name
Function
HDSL NET Lp1
(HDSL Network Loop 1)
A break-in test jack that allows a signal to be inserted by external test equipment.
The signal is inserted and received on the HDSL (Loop 1) side of the E1 NTU.
HDSL NET Lp2
(HDSL Network Loop 2)
A break-in test jack that allows a signal to be inserted by external test equipment.
The signal is inserted and received on the HDSL (Loop 2) side of the E1 NTU.
E1 LINE In A break-in test jack that allows an E1 signal to be inserted toward the E1 NTU on
the G.703 DTE side of the E1 NTU.
E1 LINE Out A break-in test jack that allows an E1 signal to be inserted toward the terminal
equipment on the G.703 DTE side of the E1 NTU.
E1 MON In
(E1 Monitor In)
A monitor jack that nonintrusively monitors the signal coming out of the terminal
equipment on the G.703 DTE side of the E1 NTU.
E1 MON Out
(E1 Monitor Out)
A monitor jack that nonintrusively monitors the signal going into the terminal
equipment on the G.703 DTE side of the E1 NTU.