Summary Of Higain Hdsl2 Loopback Codes And Activation Methods - ADC HiGain H2TU-C-231 User Manual

Testing
Table 16. Summary of HiGain HDSL2 Loopback Codes and Activation Methods
Loopback Code
NLOC 1111000
4-in-7
NREM 1110000
3-in-7
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)
HiGain systems feature the SmartJack option which can emulate a Network Interface Device
(NID) for loopback testing of the HiGain HDSL2 circuit. SMJK and NREM loopbacks perform the
same functions, but their initiation differs. SMJK indicates that the loopback was initiated by the
2-in-5 inband command. NREM, on the other hand, is initiated by the 3-in-7 inband command or
by a command issued from the maintenance terminal or the MODE and SEL pushbuttons.
Use the inband commands to enable or disable the SMJK loopback options.
The H2TU-C-231 List 2 system setting is normally enabled to recognize all inband SmartJack
loopback commands.
44
Description
DSX-1 signal is looped back to the network at the H2TU-C.
DSX-1 signal is looped back to the network at the H2TU-R.
DS1 signal from the customer is looped back to the
customer at the H2TU-R.
DS1 signal from the customer is looped back to the
customer at the H2TU-C.
Dual loopback at the H2TU-C. DSX-1 signal is looped back
to the network at the H2TU-C and signal from the customer
is looped back to the customer at the H2TU-C.
Dual loopback at the H2TU-R. DSX-1 signal is looped back
to the network at the H2TU-R and signal from the customer
is looped back to the customer at the H2TU-R.
SmartJack Loopup or NID payload (PL) code. Invokes
H2TU-R loopback towards network.
SmartJack Loopup or NID (ESF-DL) code. Invokes
H2TU-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.
January 9, 2002
LTPH-UM-1109-01, Issue 1
Method of Activation
Test Set Craft Port MODE/SEL
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H2TU-C-231 List 2
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