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150-419-100-03>
Table 4. Reading the HRU-419 Front Panel LEDs
Name
REM LOS
On
Off Normal transmission of data.
LOC LOS
On Lights red when the LOS is detected at the T1 input to the local HRU.
Off Normal transmission of data.
NET
On Lights green when the HRU is in a loopback state in which the signal
Off No NET loopbacks are active.
CI
On Lights yellow when the HRU is in a loopback state when the signal
Off No CI loopbacks are active.
B8ZS
AMI
BPV
ESF
SF
ERR
HRU-419 List 1
Description
Lights red when the LOS is detected at the T1 input to the remote
HLU unit. This condition causes the HRU to transmit the AIS pattern
towards the CPE.
This condition causes an AIS-CI signal to be transmitted towards the
customer and an AIS-CI signal to be sent to the DSX-1 from the
HLU. This state is not sent to the HLU and does not register an LOS
ALRM condition.
from the NET is being looped back to the NET.
from the CI is being looped back to the CI.
Lights green when DS1 line code option set to B8ZS. If the user DS1
line code option is set to Auto, LED indicates that the code of the
DS1 signal being received at the HRUs DS1 input is B8ZS.
Lights yellow when DS1 line code option set to AMI. If the user DS1
line code option is set to Auto, LED indicates that the code of the
DS1 signal being received at the HRUs DS1 input is AMI.
Blinks red every time a BPV, other than those associated with a B8ZS
code, is received at the HRU DS1 input.
Blinks green when the framing pattern of the signal being received
at the HRU DS1 input is ESF.
Blinks yellow when the framing pattern of the signal being received
at the HRU DS1 input is SF.
Lights red when a DS1 frame error has occurred.
September 25, 1998
Applications
7
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