PairGain T1L2BZ0A, Manual, Page: 16 / 76

Front Panel 150-231-184-05, Revision 05
6 October 25, 1999 HLU-231 List 8D
Table 2 lists the front panel display messages. The four-character displays report the code of an alarm, loopback
or diagnostic message, in some cases followed by a second four-character message that modifies the first message
with a value or current configuration setting.
Table 2. Front Panel Display Messages
Message Full Name Description
ALARM MESSAGES
ACO Alarm CutOff A system alarm has occurred and has been retired to an ACO
condition by pressing the SEL button on the HLU front panel.
ALRM Alarm Condition A system alarm condition is in effect.
BER Bit Error Rate A system BER alarm is in effect.
LLOS Local Loss of Signal Indicates that no signal is detected at the DSX-1 input to the HLU.
LOSW Loss of Sync Word Indicates that one of the HDSL loops has lost its synchronization.
The Fast LOSW feature is enabled when the Bipolar Violation
Transparency (BPVT) option is enabled (see
“BPVT Option” on
page 23 ).
MAL1 or MAL2 Margin Alarm Loop 1 or Loop 2 The margin on HDSL Loop 1 (or 2) has dropped below the threshold
(1 to 15 dB) as set by the operator.
RLOS Remote Loss of Signal Indicates that no signal is detected at the DS1 input to the HRU.
LOOPBACK MESSAGES
CDU n ? Customer Doubler n Loopback Query to initiate loopback at doubler n to CI, where n is the number
of the doubler.
CLOC Customer Local Loopback Signal from Customer is looped back to the customer at the HRU.
CREM Customer Remote Loopback Signal from customer is looped back to the customer at HLU-231.
NDU n ? Network Doubler n Loopback Query to initiate loopback at doubler n to network, where n is the
number of the doubler.
NLOC Network Local Loopback DSX-1 signal is looped back to DSX-1 at HLU.
NREM Network Remote Loopback DSX-1 signal is looped back to DSX-1 at the HRU.
SMJK Remote SmartJack Loopback Signal from DSX-1 is looped back at the HRU by the HRU SmartJack
module.