PairGain 150-1143-03, Manual, Page: 22 / 48

Installation 150-451-103-02, Revision 02
14 September 18, 1998 HDU-451 List 3
LOOPBACKS
SMJK SmartJack Loopback Loopback at HRU towards network initiated by 2
in 5 in-band loopback code or out-of-band ESF
data link code. See
Figure 4 on page 9 .
NREM Network Remote
Loopback Loopback at HRU (remote) towards network
initiated from a family of special loopbacks
(SPLP), HRU front panel push-button or
maintenance terminal. See
Figure 12 on
page 30 .
NLOC Network Local
Loopback Loopback at HLU (local) towards network
initiated from a family of special loopbacks
(SPLP) or by depressing both the MODE and
SEL HLU front panel push-buttons or
maintenance terminal. See
Figure 4 on page 9 .
NDU1 Network Doubler 1
Loopback Loopback at Doubler 1 towards network
initiated from CO (network) by a family of
special loopbacks (SPLP) or from maintenance
terminal or by depressing both the MODE and
SEL HLU front panel push-buttons. See
Figure 4
on page 9 and “Loopback Design Description”
on page 9 .
NDU2 Network Doubler 2
Loopback Loopback at Doubler 2 towards network
initiated from CO (network) by a family of
special loopbacks (SPLP) or from maintenance
terminal or by depressing both the MODE and
SEL HLU front panel push-buttons. See
Figure 4
on page 9 and “Loopback Design Description”
on page 9 .
CLOC Customer Local
Loopback Loopback at HRU (local) towards CI initiated
from CPE (customer) by a family of special
loopbacks (SPLP) or from maintenance
terminal or by depressing both the MODE and
SEL HLU front panel push-buttons. See
Figure 4
on page 9 .
Table 5. HLU-451 Status Menu Messages (Cont.)
Message Full Name Description