Section 350-231-172
Revision 01
12
HLU-231 List 7B
Loopbacks
The HLU-231 loopback messages are listed in the following tables. A block
diagram showing the GNLB locations and their activation codes are shown
on page 13.
Status Menu Loopback Messages
Message Full Name
Description
SMJK
Smart-Jack Loopback Loopback at HRU toward the HLU 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 HLU initiated
by upstream in-band codes or from the
dumb terminal.
NLOC
Network Local
Loopback
Loopback at HLU toward the network initi-
ated by upstream in-band codes or from the
dumb terminal.
CLOC
Customer Local
Loopback
Loopback at HRU toward customer initiated
from Customer Premises Equipment (CPE)
by in-band codes or from the dumb
terminal.
CREM
Customer Remote
Loopback
Loopback at HLU toward customer initiated
from CPE by in-band codes or from the
dumb terminal.
ARM
Armed
The HiGain system detected the Intelligent
Repeater 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 customer, if
enabled at the HRU through its TLOS
switch option.
Summary of Contents for 150-1111-72
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