PairGain HiGain SOLITAIRE H2TU-C-319 List 1, Technical Practice

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152-319-100-02, Revision 02 Troubleshooting
H2TU-C-319 List 1 and List 1C April 21, 2000 41
Table 15. Summary of HiGain Solitaire Loopback Codes and Activation Methods
Method of Activation
Loopback Code Description Test Set Craft Port MODE/SEL
NLOC 1111000
4-in-7
DSX-1 signal is looped back to the network at the H2TU-C.
X X X
NRG1 110000
2-in-6
DSX-1 signal is looped back to the network at the
regenerator 1.
X X X
NRG2 111000
3-in-6
DSX-1 signal is looped back to the network at the
regenerator 2.
X X X
NREM 1110000
3-in-7
DSX-1 signal is looped back to the network at the H2TU-R.
X X X
CLOC 1111100
5-in-7
Signal from the customer is looped back to the customer
at the H2TU-R.
X X X
CRG1 111100
4-in-6
Signal from the customer is looped back to the customer
at regenerator 1.
X X X
CRG2 111110
5-in-6
Signal from the customer is looped back to the customer
at regenerator 2.
X X X
CREM 1111110
6-in-7
Signal from the customer is looped back to the customer
at the H2TU-C.
X X X
SMJK LpUp
(PL)
11000
2-in-5
SmartJack Loopup or NID payload (PL) code. Invokes
H2TU-R loopback towards network.
X
SMJK LpUp
(ESF-DL)
1111-1111-
0100-1000 SmartJack Loopup or NID (ESF-DL) code. Invokes
H2TU-R loopback towards network.
X
SMJK LpDn
(PL)
11100
3-in-5
SmartJack Loopdown or NID payload (PL) code. Removes
SMJK, NLOC, NREM, CLOC, CREM, CRGx, and NRGx.
X
SMJK LpDn
(ESF-DL)
1111-1111-
0010-0100 SmartJack Loopdown or NID (ESF-DL) code. Removes
SMJK, NLOC, NREM, CLOC, CREM, CRGx, and NRGx.
X
HiGain Solitaire systems feature the SmartJack option, which can emulate a Network Interface
Device (NID) for the purpose of loopback testing of the HiGain Solitaire 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 buttons.
Use the inband commands to enable or disable the SMJK loopback options. The H2TU-C-319
system setting is normally enabled to recognize all inband SmartJack loopback commands.