PairGain T1L2F10A, Manual

Page: 29 / 76

150-231-185-05, Revision 05 Provisioning
HLU-231 List 8E September 13, 1999 21
Table 8 describes the System Settings options and lists the corresponding front-panel display codes. Factory
default parameters appear in boldface type.
Table 8. HLU-231 List 8E System Settings
System Settings
Screen Options
Front-panel
Display
Code
Parameter Description
Equalization EQL EXT Disables the HLU internal equalizer, allowing connection of external equalizer
hardware to perform the same or a similar function.
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.
ENFT-FTI Enables HLU-231 to respond to the DDS latching loopback commands
required for fractional T1 applications.
Special Loopback SPLB GNLB Configures the HiGain system to respond to the generic (3/4-in-7) 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 25
.)
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.
Zero-Byte Timeslot
Interchange ZBTSI ON Instructs the HiGain system that the Extended Superframe (ESF) is operating
in its normal non-zero-Byte Timeslot Interchange (ZBTSI) mode.
OFF Instructs the HiGain system that the ESF is operating in its normal ZBTSI
mode.
Bit Error Rate Alarm
Threshold BERT 1E-6 Activates (closes) the system alarm relay contacts on pins 20 and 21 of the
card-edge connector and flashes the red Status LED when the BER exceeds
10
-6
.
(See “BER Option”
on page 24 .
1E-7 Activates (closes) the system alarm relay contacts on pins 20 and 21 of the
card-edge connector and flashes the red Status LED when the BER 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.