PairGain HLU-611, Quick Installation Manual, Page: 15 / 21

350-611-103-01 March 17, 1998 Revision 01
HLU-611 List 3 PairGain Engineering - Plant Series 13
Loopbacks
The HLU-611 List 3 loopback messages are listed in the following table.
Loopback Messages
Message Full Name Description
SMJK Smart-Jack Loopback Loopback at HRU toward the CBA initiated by either
the (2 in 5) in-band loopback code or the out-of-
band ESF data link code.
NREM Network Remote
Loopback Loopback at HRU toward the CBA initiated by
upstream in-band codes or from the maintenance
terminal.
NLOC Network Local
Loopback Loopback at HLU toward the CBA initiated by
upstream in-band codes or from the maintenance
terminal.
CLOC Customer Local
Loopback Loopback at HRU toward CI initiated from CPE
(customer) by in-band codes or from the
maintenance terminal.
CREM Customer Remote
Loopback Loopback at HLU toward customer initiated from
CPE (customer) by in-band codes or from the
maintenance terminal.
ARM Armed The HiGain system detected the IR loopback
(2 in 5) arming code.
TLOS Transmit Loss of
Signal (Loopback) HRU is in a logic loopback state caused by a loss of
its T1 input from the CI, if enabled at the HRU via its
TLOS switch option.