Status Led Descriptions - ADC HiGain HRU-402 List 4F Quick Installation

I
NSTALLATION
Enable the SCURR switch if you are using the following doublers:
HDU-404, HDU-407, HDU-409, HDU-437, HDU-439 List 1 or List 1B,
HDU-451 List 4 or 4B.
Disable the SCURR switch if you are using an HDU-451 List 1,
List 2, List 3, or List 3B.
3 Align the HRU with the enclosure slot guides, then push the unit in until it is properly
seated in the backplane card-edge connector.
V
ERIFICATION
Once the HRU-402 is installed, verify that it is operating properly by monitoring the Status
LEDs on the front panel.
LED Status
Alarm (ALM) LED
Solid red
Blinking
HDSL LEDs
Solid green
Blinking once per second
Blinking 4 times per second
Blinking 10 times per second Indicates a Cyclical Redundancy Check (CRC) error on the HDSL loop.
OFF
DS1 Framing (FRM)
(a)
LEDs (ESF and SF)
ESF LED (solid green)
SF LED (solid green)
OFF
DS1 Code LEDs
(a) (b)
(B8ZS and AMI)
B8ZS LED (solid green)
AMI LED (solid green)
Loopback (LPBK) LED
Solid yellow
Blinking once per second
Blinking 4 times per second
(a) If DS1 signals are not detected, the ESF, SF, B8ZS, and AMI LEDs do not light.
(b) AUTO option indicates when the DS1 code is being detected as AMI or B8ZS. This option is not available
with HLU-231 List 8D and List 8E, HLU-319 List 5D and List 5E, or HLU-388 List 5D and List 5E.
(C
ONTINUED

Status LED Descriptions

Description
Shows alarm states for remote and local Loss of Signal (LOS).
Indicates an LOS condition at the T1 input of the HRU.
Indicates an LOS condition at the T1 input of the line unit.
Displays HDSL Loop 1 (LP1) and Loop 2 (LP2) conditions.
Indicates HDSL loop is in synchronization.
Indicates the HDSL loop is trying to acquire synchronization.
Indicates a margin alarm condition on the HDSL loop.
Indicates no activity on the HDSL loop.
Indicates framing patterns. If DS1 signals are not detected, the ESF and
SF LEDs do not light.
Indicates Extended Super Frame (ESF). The LED blinks once per second
when a frame error occurs.
Indicates Super Frame (SF). The LED blinks once per second when a
frame error occurs.
Indicates unframed or no signal.
Indicates DS1 code options. If DS1 signals are not detected, the B8ZS
(Bipolar with 8-Zero Substitution) and AMI (Alternate Mark Inversion)
LEDs do not light.
Indicates that the DS1 line code option is set to B8ZS or the option is set
to AUTO and a B8ZS line code is being received at the HRU DS 1 input.
The LED blinks once per second when a string of excessive zeros is
detected.
Indicates that the user DS1 line code option is set to AMI or the option is
set to AUTO and an AMI line code is being received at the HRU DS1 input.
This LED blinks once per second when a Bipolar Violation (BPV) is
detected.
Shows loopback states to and from the network and to and from the
Customer Interface (CI).
Indicates Network Remote (NREM) loopback, SmartJack (SMJK), or
Transmit Loss of Signal (TLOS).
Indicates Customer Local (CLOC) loopback state.
Indicates the HRU is in an Armed state.
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