ADC HiGain HLU-200, User Manual

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350-200-115-02, Issue 2 Alarms
HLU-200 List 1E September 25, 1998 15
L
OOPBACKS
The HLU-200 loopback messages are described in Table 5 .
Figure 3 on page 16 shows the configurations for the HLU-200 List 1E FT1
loopbacks with doublers.
Table 5. Loopbacks
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 maintenance
terminal.
NLOC Network Local
Loopback Loopback at HLU toward the network initiated by
upstream in-band codes or from the maintenance
terminal.
NDUn Network Doubler n
Loopback Loopback at Doubler #n to network initiated by
IOR code or by Manual Loopback buttons on the
HLU-200 List 1E front panel or by the
maintenance terminal.
CLOC Customer Local
Loopback Loopback at HRU toward customer initiated from
Customer Premises Equipment (CPE) by in-band
codes or from the maintenance terminal.
CREM Customer Remote
Loopback Loopback at HLU toward customer initiated from
CPE by in-band codes or from the maintenance
terminal.
CDUn Customer Doubler n
Loopback Loopback at Doubler #n to CI initiated by ILR
code, the Manual Loopback buttons on HLU-200
List 1E front panel or by the maintenance
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.