ADC HiGain HRU-402 User Manual page 14

Product Overview
Name
Alarm (ALM) LED
HDSL LEDs
DS-1 Framing (FRM)
LEDs
DS-1 Code LEDs
Loopback (LPBK)
LED
6
Table 2. Front Panel Component
Function
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.
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.
Indications for framing patterns.
unframed, the LEDs will not light.
Solid green indicates Extended Super Frame (ESF). The light
blinks one time per second when a frame error is indicated.
Solid green indicates Super Frame (SF). The light blinks one time
per .5 second when a frame error is indicated.
Indications for DS-1 code options.
DS-1 Code Option=Bipolar with 8-Zero Substitution (B8ZS): Solid
green indicates that the DS-1 line code option is set to B8ZS. The
solid green light does not indicate the actual DS-1 line code being
received, which may be Alternate Mark Inversion (AMI) or B8ZS.
The light blinks one time per second when a string of excessive
zeros is detected.
DS-1 Code Option=Auto: Solid green indicates the DS-1 code is
being detected as B8ZS.
DS-1 Code Option=AMI: Solid green indicates that the user DS-1
line code option is set to AMI. This light blinks one time per
second when a Bipolar Violation (BPV) is detected.
DS-1 Code Option=Auto: Solid green indicates that the user DS-1
line code is being detected as AMI.
Shows loopback states to and from the Network (NET) and to and
from the Customer Interface (CI) and an ARMED condition.
Solid yellow indicates Network Remote Loopback (NREM).
Blinking 1 per second indicates Customer Local Loopback (CLOC)
loopback state.
Blinking 4 per second indicates the HRU is in an ARMED state.
November 5, 1998
(a)
If DS-1 framing is set to
(a)
HRU-402 List 1 and List 3
150-402-100-03
Continued