Overview
150-359-100-01,
Revision
01
4
October 27, 2000
HXU-359 List 1
Figure 3.
HXU-359 List 1 Front Panel
The HXU-359 continuously monitors the services, the Network Element
(NE), the network and the signals it transports. The LEDs on the HXU front
panel indicate current states. Any alarm triggers an audible alarm relay.
Table 1.
Front-Panel Description
Front-Panel Feature
Function
Status LEDs
Power (green)
Power on.
Fault (yellow)
HXU-359 controller is not operating properly. It is normal,
however, for the LED to flash during powerup.
Critical (red)
Critical alarm.
Major (red)
Major alarm.
Minor (yellow)
Minor alarm.
Services (red)
Indicates a critical or major alarm in at least one of the DS1
services.
(a)
(a) Future enhancements will include support for E1 services.
Loopback (green)
A DS1 or STS-1 loopback operation is active.
RDI (red)
A Remote Defect Indication alarm indicates that an alarm has
been received from the remote SONET system.
STS LOS (red)
Loss of Signal at STS-1 level.
Active (green)
Active indication in a protected system.
Craft port
RS-232 connector for serial communications with a
maintenance terminal.
HXU-359
RS232
L
Po
w
e
r
F
ault
Cr
itical
Major
Minor
Ser
vices
Loopbac
k
RDI
STSLOS
Activ
e
Status LEDs
