ADC HRU-419 HiGain User Manual page 16

Applications
Table 4. Reading the HRU-419 Front Panel LEDs (Cont.)
Name
LP1
OK
MAR
ES
LP2
OK
MAR
ES
8
Description
Blinks green when HDSL Loop 1 is synchronizing with the HLU.
Lights green when HDSL Loop 1 is synchronized and ready to
receive and transmit data.
Blinks yellow when a problem in Loop 1 (doubler applications only)
of the HDSL cable pairs that are non-adjacent to the HRU. Blinking
once per second indicates a Loss of Sync Word (LOSW) problem in
Span all ones Loop 1 HDSL pair between the HLU and doubler.
Blinking twice per second indicates a LOSW problem in Span two's
Loop 1 HDSL pair between the first and second doublers.
Blinks red every second when one HDSL CRC error is detected on
Loop 1 from the upstream module.
Blinks green when HDSL Loop 2 is synchronizing with the HLU.
Lights green when HDSL Loop 2 is synchronized and ready to
receive and transmit data.
Blinks yellow when a problem in Loop 2 (doubler applications only)
of the HDSL cable pairs that are non-adjacent to the HRU. Blinking
once per second indicates a LOSW problem in Span two's Loop 2
HDSL pair between the HLU and doubler. Blinking twice per second
indicates a LOSW problem in Span 2s Loop 2 HDSL pair between the
first and second doublers.
Blinks red every second in which at least one HDSL CRC error is
detected on Loop 2 from the upstream module.
September 25, 1998
150-419-100-03>
HRU-419 List 1