Section 150-441-124
June 12, 1997
Revision 01
Page 16
PairGain Engineering - Plant Series
HiGain HLU-D41
Table 9. System Options
Mode
Choice
Description
IDLE
FF*
Blocked channels are filled with Hex transmit code FF.
7F
Blocked channels are filled with Hex transmit code 7F.
LPBK
DIS*
Disables the activation of NREM by NEI DDS code.
ENA
Enables the activation of NREM by NEI DDS code.
PWRF
DIS
Prevents line powering over the HDSL pair.
ENA*
Allows line powering over the HDSL pair.
ESAL
17
Causes a minor alarm display (flashing red Status LED) when 17 Errored Seconds (ES) occur within a
24-hour period.
170
Causes a minor alarm display (flashing red Status LED) when 170 ES occur within a 24-hour period.
NONE*
Prevents generation of a minor alarm due to excessive ES.
LBTO
NONE
Disables automatic time-out cancellation of all loopbacks.
20
Sets automatic time-out to 20 minutes.
60*
Sets automatic time-out to 60 minutes.
120
Sets automatic time-out to 120 minutes.
DS1
AUTO
The HRU independently monitors its incoming DS1 bit stream for the Binary Eight Zero Substitution
(B8ZS) pattern. If the HRU 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 the HRU into its B8ZS mode.
AMI*
Places the HRU into its AMI mode.
SLOT
ALT
Customer data is transported in Alternating DS0 time slots (1, 3, 5...23). Time slots 2, 4, 6, ... 24 are
not used.
CONT*
Customer data is transported in Contiguous DS0 time slots (1, 2, 3...12). Time slots 13 through 24 are
not used.
HAIS
ENA*
Enables the HRU to transmit the AIS signal toward the CPE when the HDSL loop is not in sync
(LOSW) or when a margin alarm occurs.
DIS
Prevents the HRU from transmitting the AIS signal toward the CPE when a margin alarm occurs. AIS
is still transmitted when the HDSL loop is not in sync.
NAIS
ENA*
Enables the HRU to transmit the AIS signal toward the CPE when in NREM loopback.
DIS
Enables the HRU to transmit an LOS condition (instead of the AIS signal) toward the CPE when in
NREM loopback.
BAND
01-12
Sets the bandwidth in 64K increments. For each press of the button, the display adds 64K, as well as
an additional channel to the system setting. One channel is 64K, 12 channels is 768K.
MARG
Range:
0 to 15 dB
Default: 4*
dB
The MARG (Margin Alarm Threshold) can only be set using the Maintenance Terminal menus. This
setting determines the minimum allowable margin below which a minor alarm can occur. A 0 dB
setting disables this option.
SGNL
RBS
All DS0 channels in Robbed Bit Signaling (RBS) mode.
CLR*
All DS0 channels in Clear Channel mode.
MIX
Mix of RBS and Clear Channel modes.
CONF
YES
Confirms that all operating parameters (except Margin) are to be updated to the new selections.
NO*
Prevents newly selected operating parameters from being updated. These options remain as they were
before the setting options procedure was started.
* Default setting.
