LTPH-UM-1109-01, Issue 1 Provisioning
H2TU-C-231 List 2 January 9, 2002 19
DS1 Line Coding (DS1) Option. The DS1 line code option should always be set to conform to the type of
DS1 service (AMI or B8ZS) being provided by the HiGain HDSL2 system. The Auto mode, which can adapt to
either AMI or B8ZS, should only be used in applications that require it (such as when HiGain HDSL2 acts as a
standby circuit to DS1 circuits whose line codes are not known or may be both AMI and B8ZS). This is because
the Auto mode induces one BPV in the DS1 bit stream whenever it switches from AMI to B8ZS. The Auto mode
allows both the H2TU-C and the H2TU-R to set its DS1 output code to that which is being received at the distant
end DS1 input. This forces the input and the output codes in each direction of transmission to be identical.
DS1 BER
Threshold
See “DS1 BER
(DBER) Option”
on page 21.
DBER ENA Enables the fixed 24-hour DS1 BER threshold.
DIS Prevents the generation of a system alarm due to DS1 BER.
HDSL2 BER
Threshold
See “HDSL2 BER
Threshold (HBER)
Option” on
page 21 and
“System Alarm
Output Pins” on
page 58.
HBER 1E-6 System alarm relay contact closes and the Status LED flashes red when the
Block Error Rate exceeds 10
-6
.
1E-7 System alarm relay contact closes and the Status LED flashes red when BER
exceeds 10
-7
.
NONE Prevents generation of a system alarm due to BER.
Special Loopback
Mode
SPLB GNLB Configures the HiGain HDSL2 system to respond to the generic inband
loopback codes.
A1LB and
A2LB
Configures the HiGain HDSL2 system to respond to the inband loopback
codes of the Westell addressable repeater.
A3LB Configures the HiGain HDSL2 system to respond to the inband loopback
codes of the Wescom addressable repeater.
A4LB Configures the HiGain HDSL2 system to respond to the inband loopback
codes of the Wescom Mod 1 addressable repeater.
A5LB Configures the HiGain HDSL2 system to respond to the inband loopback
codes of the Westell Mod 1 addressable repeater.
SmartJack
Loopback
LPBK ENA Enables the HiGain HDSL2 system to recognize all inband SmartJack (SMJK)
loopback commands.
DIS Configures the HiGain HDSL2 system to ignore all inband SmartJack
loopback commands.
Minor Alarm ALM ENA Enables the generation of the output alarm on pins 20 and 21 when a system
alarm condition occurs.
DIS Disables the generation of the output alarm on pins 20 and 21 when a system
alarm condition occurs.
Remote
Disconnect Alarm
RDA ENA Enables a remote DS1 LOS condition at the input to the H2TU-R 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 H2TU-R from
causing an LOS alarm. The front-panel Status LED still flashes red and the
ALRM RLOS message displays, but the alarm relay contacts do not close and
LOS is sent towards the network from the H2TU-C instead of AIS.
Table 6. H2TU-C-231 List 2 ADC Config Menu Options (Continued)
ADC Config Menu
Options
Front Panel
Display
Code
Selection Description
