Section 150-611-100
Revision 02
Page 13
TABLE 2. SYSTEM OPTION SETTINGS (CONTINUED)
MODE
CHOICE
DESCRIPTION
ALM
DIS*
Opens the minor alarm relay contacts if closed, and prevents another relay alarm
closure from occurring.
ENA
Enables activation of the minor alarm relay when a minor alarm condition occurs.
DS1
AUTO
The HLU-611 and HRU-612 independently monitor their incoming DS1 bit streams
for the Binary Eight Zero Substitution (B8ZS) pattern. If either unit detects this
pattern, it enters its B8ZS mode. It reverts back to its Alternate Mark Inversion
(AMI) mode if no B8ZS patterns are received for five seconds.
B8ZS
Places both the HLU-611 and HRU-612 into their B8ZS modes.
AMI*
Places both the HLU-611 and HRU-612 into their AMI modes.
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.
HAIS
2LP*
Causes the HiGain system to transmit the AIS signal at both the HLU-611 and
HRU-612 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-611 and
HRU-612 T1 output ports when either of the two HDSL loops is not in sync
(LOSW) or if a MARgin alarm occurs.
SAIS
ENA*
Causes the HRU-612 to transmit the AIS signal towards the Network Interface (NI)
when in NREM or Smart-Jack loopback.
DIS
Causes the List 1 HRU-612 to transmit the signal from the network towards the NI
and the List 2 HRU-612 to open and terminate its RCV NI port when an HRU
NREM or Smart-Jack loopback is executed. The AIS signal is off.
CONF
YES
Confirms that all eleven (listed above) operating modes are to be updated to their
current choices.
NO*
Prevents the most recently selected operating mode choices form being updated.
They remain as they were before the system option settings mode was entered.
MARgin Alrm
Trsh
0 to 15 dB
The Margin Alarm Threshold can only be set via the RS-232 maintenance port with
a terminal. It determines the minimum allowable margin below which a minor
alarm can occur.
4 dB*
(Default value)
DS0
BLK
The DS0 blocking option can only be set via the RS-232 maintenance port with a
terminal. The 4-Character HLU-611 front panel only displays the status of the
blocking option. BLK indicates at least one channel is blocked.
NONE*
NONE indicates no channels are blocked.
*Indicates HLU-611 factory (default) settings.
