PairGain 150-1140-42, Manual

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Revision 01 December 22, 1997 150-319-142-01
36 PairGain Engineering - Plant Series HLU-319 List 4B
Using the codes listed in Table 5 on page 39 , a network tester can activate
loopbacks NLOC or NREM or SMJK (if enabled). A customer tester can
activate loopbacks CLOC or CREM. All loopbacks shown in
Table 5 can be
initiated from the HLU-319 List 4B front panel MODE and SEL buttons.
The ARMED mode has an automatic time out of 120 minutes. The
timer is reset to 120 for any of the following events:
•
loopback terminates (manually or time-out)
• query
• alternate query
• far end activate
• another ARM command
Table 4. Addressable 1, 2, 5 (A1LB, A2LB, A5LB) Repeater Loopback
Commands*
Name Description Code
ARMING or NI LPBK
(in-band) Arming code 11000 11000...
ARMING or NI LPBK
(ESF Data Link) Arming code 1111(F)**1111(F)0100(4)1000(8)
IR LPDN or DISARM
(in-band) Disarming code 11100 11100...
DISARM (ESF Data
Link) Disarming code Disarming code
IOR LPBK (NLOC
230-232 bit errors)
(CREM 229-231 bit
errors)† HLU Loop up 1101(D)0011(3)1101(D)0011(3)
1100C)0111(7)0100(4)0010(2)
ILR-2 LPBK (NREM
and CLOC 20 bit
errors) HRU Loop up 1101(D)0101(5)1101(D)0101(5)
IR LPDN Loopdown (HLU
or HRU) 1001(9)0011(3)1001(9)0011(3)
IR QUERY LPBK Query loopback 1101(D)0101(5)1101(D)0101(5)
IR ALTERNATE QUERY
LPBK Alternate Query
loopback 1101(D)0101(5)1110(E)1010(A)
(Continued)