150-402-111-02
Product
Description
HRU-402 List 1A
December 8, 1998
9
S
TATUS
LED
S
describes the functions of the Status LEDs on the front panel.
Table 3.
Status LED Descriptions
LED Status
Indicates
Alarm (ALM) LED
Shows alarm states for remote and local Loss of Signal (LOS).
Solid red Indicates a LOS condition at HRU T1 input.
Blinking red Indicates a LOS condition at HLU T1 input.
HDSL LEDs
Displays HDSL Loop 1 (LP1) and Loop 2 (LP2) conditions.
Solid green Indicates HDSL loop is in sync.
Blinking green 1 time
per second
Indicates the HDSL loop is trying to acquire sync.
Blinking green 4
times per second
Indicates a margin alarm condition on the HDSL loop.
Blinking green 10
times per second
Indicates a Cycle Redundancy Check (CRC) error on the HDSL
loop.
OFF Indicates no activity on the HDSL loop.
DS-1 Framing (FRM)
LEDs (ESF and SF)
Indications for framing patterns.
(a)
If DS-1 framing is set to
Unframed (or THRU), the LEDs will not light.
ESF LED = Solid
green
Indicates Extended Super Frame (ESF). The light blinks one time
per second when a frame error is indicated.
SF LED = Solid green Indicates Super Frame (SF). The light blinks twice per .5 second
when a frame error is indicated.
OFF Indicates unframed or no signal
Continued
