Maintenance
150-388-125-01, Revision 01
24
September 15, 1998
HLU-388 List 2E
ES Alarm Thresh
ESAL
17
Lights the red Status LED when 17 Errored Seconds occur within a 24-hour
period.
170
Lights the red Status LED when 170 Errored Seconds occur within a 24-hour
period.
NONE*
Prevents generation of a system alarm due to excessive Errored Seconds.
Loopback Timeout
LBTO
NONE
Disables automatic time-out cancellation of all loopbacks.
20
Sets automatic cancellation of all loopbacks to 20 minutes after initiation.
60*
Sets automatic cancellation of all loopbacks to 60 minutes after initiation.
120
Sets automatic cancellation of all loopbacks to 120 minutes after initiation.
Alarm
ALM
DIS*
This option is not supported by the HLU-388 List 2E.
ENA
DSX-1 Line Code
DS1
AUTO
The HLU-388 and remote HRU monitor their incoming HRU T1 bit streams for
the B8ZS pattern. If either detects a valid B8ZS sequence, it switches to its
B8ZS mode and also forces the end unit’s output into B8ZS mode. Each
reverts back to its Alternate Mark Inversion (AMI) output mode if no B8ZS
patterns are received at its inputs for five seconds. Thus, the HLU’s T1 input
can detect either AMI or B8ZS patterns when in the AUTO mode.
B8ZS
Places both the HLU-388 and HRU into their B8ZS modes.
AMI*
Places both the HLU-388 and HRU into their AMI modes.
Framing
FRMG
AUTO*
Configures the HiGain system to operate in an auto-framing (AUTO) mode in
which it continuously searches the input T1 bit stream for a valid SF or ESF
frame pattern. This feature is required for fractional T1 applications (DS0
blocking) where it insures proper channel time slot alignment. While the
HiGain system can also process unframed data in this AUTO mode, it is
recommended that the unframed (UNFR) mode be used for all unframed
applications. Using the AUTO mode for unframed applications runs the risk of
detecting “pseudo-valid” frame sequences, which can affect the data integrity.
UNFR
Configures the HiGain system to operate in an unframed mode. This mode
disables the auto framing process and forces the HiGain system to function as
a transparent bit pipe.
AIS On HDSL LOSW
HAIS
2LP*
Causes the HiGain system to transmit the AIS signal at both the HLU-388 and
HRU T1 output ports when both of the HDSL loops are not in sync (LOSW).
1LP
Causes the HiGain system to transmit the AIS signal at both the HLU-388 and
HRU T1 output ports when either of the two HDSL loops is not in sync (LOSW)
or if a Margin alarm occurs.
AIS On SMJK/NREM
SAIS
ENA*
Causes the List 6 and 7 HRU-412 to transmit the AIS signal towards the
Customer Interface (CI) when in NREM or SmartJack loopback.
DIS
Causes the HRU-412 List 6 to either transmit the signal from the network
towards the CI RCU port or to open and terminate its RCV CI port when an
HRU NREM or SmartJack loopback is executed. The AIS signal is not sent
(towards the CI).
Table 9.
HLU-388 System Settings Menu Options (Cont.)
System Settings
Menu Options
Front Panel
Display
Code
Selection
Description
