150-388-105-05, Revision 05
Front Panel
HLU-388 List 5
March 25, 2000
5
Table 2.
Front-panel Description
Front-panel Feature
Function
Front-panel display
Displays four-character status, provisioning, and alarm system messages.The front-panel display
illuminates when power is initially applied. To conserve power the display only remains lit for
4 minutes. Using the MODE or SEL buttons reactivates the display and restarts the 4-minute timer.
Refer to
for a listing of the four-character messages.
Setup buttons
Permits the user mode and selections to be monitored and modified without a maintenance
terminal. Used to initiate all HiGain loopbacks and to display DSX-1 line parameters and line unit
identity.
Status LED
Reports the status on the following conditions:
Green
Normal operation
Flashing green
HDSL acquisition
Red
Fuse Alarm
Flashing red
System Alarm
Yellow
Self Test is in process or an HLU-388 List 5 Customer Remote Loopback (CREM) or a Network
Local Loopback (NLOC) is in effect.
Flashing yellow
HLU-388 List 5 is armed to respond to Intelligent Repeater (IR) loop codes.
RS-232 craft port
Provides bidirectional communication between the unit and an external terminal to allow
configuration and performance monitoring through the Maintenance Terminal screens.
CLEI and ECI bar code label
Provides the human-readable Common Language Equipment Identifier (CLEI) code number and the
Equipment Catalog Item (ECI) bar code number.
List number
Identifies the version of HLU-388.
Configuration number
Contains either a five- or six-digit warranty configuration number or a standalone two- or three-digit
configuration number as follows:
Digit 1 - Last digit of shipment year
Digits 2 and 3 - Shipment month
Digits 4, 5, and 6 - Configuration number
The configuration number can also be found on a small bar label that contains the Julian date code
and part number. This gummed label may be affixed to the PC board or to the front panel.