Summary Of Higain Hdsl2 Loopback Codes And Activation Methods - ADC Campus-RS Remote User Manual

152-402-145-02, Issue 2
Table 10. 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)
(a) The RULB dual loopback (same as NREM-CLOC) can be activated by pressing the LBK button on the H2TU-R front panel.
HiGain HDSL2 systems feature the SmartJack (SMJK) option which can emulate a Network
Interface Device (NID) for the purpose of 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, by the H2TU-R front panel LBK button, by a command
issued from the maintenance terminal, or by the H2TU-C front panel MODE and SEL buttons.
Use the inband commands to enable or disable the SMJK loopback options. The HiGain HDSL2
system setting is normally enabled to recognize all inband SMJK loopback commands.
H2TU-R-402
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 H2TU-C. DSX-1 signal is looped back to
the network at the H2TU-C and DS1 signal from the
customer is looped back to the customer at the H2TU-C.
Dual loopback at H2TU-R. DSX-1 signal is looped back to
the network at the H2TU-R and DS1 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, CREM, CRGx, and NRGx.
SmartJack Loopdown or NID (ESF-DL) code. Removes
SMJK, NLOC, NREM, CLOC, CREM, CRGx, and NRGx.
June 16, 2000
Loopback Operation
Method of Activation
H2TU-C
Test Set Craft Port
MODE/SEL
X X
X X
X X
X X
X
X
X
X
X
X
X
X
X
X
X
(a)
X
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