150-432-100-02, Revision 02
Provisioning
HLU-432 List 1
July 18, 2002
21
DS1 Line Code
(See
DS1
AUTO
The HLU and HRU monitor the incoming T1 bit streams for the B8ZS line code.
If the HRU detects this code, the HLU enters B8ZS output mode. The HLU
reverts back to AMI output mode if no B8ZS codes are received at the HRU
input for 5 seconds. Similarly, when the HLU detects the B8ZS code, the HRU
enters the B8ZS mode and returns to AMI mode if no B8ZS code is received
at the HLU input for 5 seconds.
B8ZS
Places both the HLU and HRU into their B8ZS modes.
AMI
Places both the HLU 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
(See
.)
HAIS
2LP
Causes the HiGain system to transmit the AIS signal at both the HLU-432 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-432 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 HRU to transmit the AIS signal towards the Customer Interface
(CI) when in NREM or SmartJack loopback.
DIS
Causes the HRU to either transmit the signal from the network towards the CI
RCV 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).
DSO Blocking
(See
DS0
BLK
The DS0 blocking option can only be set through a maintenance terminal
connected to the craft port. The four-character front-panel display only shows
the status of the blocking option. BLK indicates at least one channel is
blocked.
NONE
Indicates no channels are blocked.
Margin Alarm
Threshold
(See
.)
MARG
0 to 15 dB
The Margin Alarm Threshold can only be set through a maintenance terminal
connected to the craft port. It determines the minimum allowable margin
below which a system alarm can occur. Zero disables the alarm.
4dB
Default value.
RLOS Alarm
RDA
ENA
Enables a remote DS1 LOS condition at the input to the HRU to generate an
LOS alarm. AIS or LOS (depending on ALMP) is sent towards the network.
DIS
Prevents a remote DS1 LOS condition at the input to the HRU from causing
an LOS alarm. The front-panel Status LED still flashes red and the ALRM
RLOS message is displayed but the alarm relay contacts do not close and LOS
is sent towards the network from the HLU instead of AIS.
Alarm Pattern
ALMP
AIS
Enables HiGain to output an AIS payload at its T1 ports for LOSW, T1 LOS,
and Margin alarms.
LOS
Enables HiGain to output an LOS condition at its T1 ports for LOSW, T1 LOS,
and Margin alarms.
Table 8.
HLU-432 List 1 System Settings (Cont.)
System Settings
Screen Options
Front-Panel
Display
Code
Parameter
Description
