Table 6. Hdsl System Alarms; Table 7. Loopback Messages - PairGain HIGAIN HLU-431 Manual

150-431-116-01, Revision 01
Message Name
LOSW Loss of Sync Word
LLOS Local Loss of Signal
MAL1(2) Margin Alarm 1 or 2
NONE No Alarm
R(L)AIS Remote (Local) Alarm Indicating
Signal
RLOS Remote Loss of Signal
Table 7 lists loopback messages displayed on the Span Status screens. For information about loopback codes, see
"GNLB Loopback Test Procedures" on page
Message Full Name
ARM Armed
CDUn Customer Doubler n Loopback
CHREV-SPx Channels Reversed
CLOC Customer Local Loopback
CREM Customer Remote Loopback
H1 (H2) ES HDSL CRC Error Channel 1 or 2
NDUn Network Doubler n Loopback
NLOC Network Local Loopback
NREM Network Remote Loopback
SMJK SmartJack Loopback
TLOS Transmit Loss of Signal Loopback
HLU-431 List 1F

Table 6. HDSL System Alarms

Description
One of the HDSL loops has lost synchronization.
No signal from HLU-431 local T1 input.
The margin on the HDSL Loop 1 (or Loop 2) has dropped below the
threshold (1 to 15 dB) set by the user. Setting the threshold to zero
inhibits the margin alarm.
No alarm is indicated.
Indicates an AIS pattern (all ones) is being transmitted from the
remote (or local) T1 output port.
No signal from HRU T1 input.
38.

Table 7. Loopback Messages

Description
The HiGain system has detected the Intelligent Repeater (IR) loopback
arming code (2-in-5).
Loopback at Doubler (n) to Customer Installation (CI) initiated by an
Intelligent Line Repeater (ILR) code, the MODE and SEL buttons on
HLU-431 front panel, or by the maintenance terminal.
The Loop 1 and Loop 2 HDSL pairs are reversed at Span x. Loop 1 is
specified to carry the (-) simplex DC voltage, and Loop 2 is specified
to carry the (+) simplex DC voltage. SPx indicates that the first
occurrence of a reversed span is on Span x, where x is the number of
the span.
Loopback at HRU (local) to CI initiated from Customer Premises
Equipment (CPE) by the ILR code, the MODE and SEL buttons on the
HLU-431 front panel, or by the maintenance terminal.
Loopback at HLU-431 (remote) to customer initiated by Intelligent
Office Repeater (IOR) code, the MODE and SEL buttons on the
HLU-431 front panel, or by the maintenance terminal.
HLU HDSL Loop1 or Loop2 CRC error.
Loopback at Doubler (n) to network initiated by IOR code, by the
MODE and SEL buttons on the HLU-431 front panel, or by the
maintenance terminal.
Loopback HLU-431 (local) to network initiated from CO by IOR code,
the HLU-431 front panel MODE and SEL buttons, or by the
maintenance terminal.
Loopback at HRU to network initiated from CO (network) by ILR #2
code, the MODE and SEL buttons on the HLU-431 front panel, the HRU
manual loopback button, or by the maintenance terminal.
Loopback from HRU to network initiated by (2-in-5) inband loopback
code or out-of-band ESF data link code.
HRU is in a logic loopback state caused by a loss of its T1 input from
the CI (if enabled at the HRU through its TLOS switch option).
May 14, 1999
Provisioning
17