Gnlb Test Procedures - ADC H4TU-C-388-L1 User Manual

Testing

GNLB Test Procedures

Figure 29 on page 51
GNLB commands shown. Refer to
to doublers is shown in bold.
Loopback Code
NLOC 1111000
4-in-7
NREM 1110000
3-in-7
NDU1 110000
2-in-6
CDU1 111100
4-in-6
NDU2 111000
3-in-6
CDU2 111110
5-in-6
D1LB
D2LB
CLOC 1111100
5-in-7
CREM 1111110
6-in-7
COLB
RULB
SMJK LpUp 11000
(PL) 2-in-5
SMJK LpUp 1111-1111-
0100-1000
(ESF-DL)
SMJK LpDn 11100
(PL) 3-in-5
SMJK LpDn 1111-1111-
0010-0100
(ESF-DL)
52
is a graphical representation of the various loopback configurations with the associated
Table 16 on page 52
Table 16. Summary of HDSL4 Loopback Codes
Description
DSX-1 signal is looped back to the network at
the H4TU-C.
DSX-1 signal is looped back to the network at
the H4TU-R.
Signal is looped back to the network at H4D1.
DS1 signal from customer is looped back to the
customer at H4D1.
Signal is looped back to the network at H4D2.
DS1 signal from customer is looped back tot he
customer at H4D2.
Dual loopback at H4D1.
Dual loopback at H4D2.
DS1 signal from the customer is looped back to
the customer at the H4TU-R.
DS1 signal from the customer is looped back to
the customer at the H4TU-C.
Dual loopback at the H4TU-C. DSX-1 signal is
looped back to the network at the H4TU-C and
DS1 signal from the customer is looped back to
the customer at the H4TU-C.
Dual loopback at the H4TU-R. DSX-1 signal is
looped back to the network at the H4TU-R and
DS1 signal from the customer is looped back to
the customer at the H4TU-R.
SmartJack Loopup or NID payload (PL) code.
Invokes H4TU-R loopback towards network.
SmartJack Loopup or NID (ESF-DL) code.
Invokes H4TU-R loopback towards network.
SmartJack Loopdown or NID payload (PL) code.
Removes SMJK, NLOC, NREM, CLOC, and
CREM.
SmartJack Loopdown or NID (ESF-DL) code.
Removes SMJK, NLOC, NREM, CLOC, and
CREM.
September 12, 2003
for a description of these commands. Information specific
Method of Activation
Test Set
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LTPH-UM-1122-02, Issue 2
Craft Port MODE/SEL
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H4TU-C-388 List 1