PairGain 150-1141-05, Руководство пользователя, Страница: 31 / 78

150-388-105-05, Revision 05 Provisioning
HLU-388 List 5 March 25, 2000 23
Table 9 describes the System Settings options and lists the corresponding front-panel display codes. Factory
default parameters appear in boldface type.
Table 9. HLU-388 List 5 System Settings
System Settings
Screen Options
Front-panel
Display
Code
Parameter Description
Equalization 0 Sets the Equalizer to DSX-1 for 0 to 133 feet.
133 Sets the Equalizer to DSX-1 for 133 to 266 feet.
266 Sets the Equalizer to DSX-1 for 266 to 399 feet.
399 Sets the Equalizer to DSX-1 for 399 to 533 feet.
533 Sets the Equalizer to DSX-1 for 533 to 655 feet.
SmartJack Loopback LBPK DIS Configures the HiGain system to ignore all inband SmartJack loopback
commands.
ENA Enables the HiGain system to recognize all inband SmartJack loopback
commands.
Special Loopback SPLB GNLB Configures the HiGain system to respond to the generic inband loopback
codes.
A1LB and
A2LB Configures the HiGain system to respond to the inband loopback codes of the
Teltrend addressable repeater.
A3LB Configures the HiGain system to respond to the inband loopback codes of the
Wescom addressable repeater.
A4LB Configures the HiGain system to respond to the inband loopback codes of the
Wescom Mod 1 addressable repeater.
A5LB Configures the HiGain system to respond to the inband loopback codes of the
Teltrend Mod 1 addressable repeater.
Power PWRF DIS Disables powering to the HDSL pair.
(See “HDSL Line
Voltage Options” on
page 27
.)
LOW Keeps the HDSL line voltage at -140 Vdc maximum for all applications.
AUTO Allows the HDSL line voltage to automatically switch between -140 Vdc
maximum for non-doubler applications and ±112 Vdc for doubler
applications.
HIGH Forces the HDSL line voltage to ±112 Vdc for all applications.
ZBTSI ZBTS ON Tells the HiGain system that the ESF frame is operating in its Zero-Byte
Timeslot Interchange (ZBTSI) mode.
OFF Tells the HiGain system that the ESF frame is operating in its normal
non-ZBTSI mode.
BER Alarm
Threshold BERT 1E-6 Alarm activates when BER threshold exceeds 10
-6
.
(See “BER Option”
on page 26 .
1E-7 Alarm activates when BER threshold exceeds 10
-7
.
NONE Prevents generation of a system alarm due to BER.
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.
DS1 Line Code
(See “DS1 Line Code
Option” on page 26 .)
CODE 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.