150-319-205-05, Issue 5
Maintenance
ELU-319 List 5E and List 6E
January 26, 2000
29
S
YSTEM
S
ETTINGS
S
CREEN
O
PTIONS
Table 15
describes the System Settings screen options and their counterpart codes for the front panel display.
Factory default settings are shown in bold.
L
OOPBACK
M
ENU
The Loopback Menu permits you to issue loopbacks to the HiGain system. There are four possible Loopback
Menus:
•
Loopback Menu: No doubler
•
Loopback Menu: One doubler
•
Loopback Menu: Two doublers
•
Loopback Menu: Three doublers
In all instances, press
from the Maintenance Terminal Main Menu to display the Loopback Menu.
Figure 13
shows an example of a Loopback Menu when no doublers are present;
Figure 14
shows an example when three
doublers are present.
Table 15.
ELU-319 List 5E and List 6E System Settings Screen Options
System Settings
Screen Options
Front Panel
Display
Code
Selection
Description
Power
PWRF
DIS
Disables powering to the HDSL pair.
LOW
Keeps the HDSL line voltage at -140 V maximum for all applications.
AUTO
Allows the HDSL line voltage to automatically switch between -140 V
maximum for non-doubler applications and
±
112 V for doubler applications.
HIGH
Forces the HDSL line voltage to ±112 V for all applications.
BER Alarm
Threshold
BERT
1E-6
Activates (closes) the SmartJack alarm relay contacts on pins 20 and 21 and
flashes the red STATUS LED when the BER exceeds 10
-6
.
1E-7
Activates (closes) the system alarm relay contacts on pins 20 and 21 and
flashes the red STATUS LED when 10
-6
> BER >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.
Alarm
ALM
DIS
Opens the system alarm relay contacts if closed, and disables activation of the
system alarm relay when a system alarm condition occurs.
ENA
Enables activation of the system alarm relay when a system alarm condition
occurs.
Margin Alarm
Threshold
MARG
0 to 15 dB
The Margin Alarm Threshold can only be set via the RS-232 craft port with a
terminal. It determines the minimum allowable margin below which a system
alarm can occur. Zero disables the alarm.
4dB
Default value
D
