ADC HiGain HLU-200 User Manual page 20

3. ALRM TLOS: A user option that causes the loss of the HRU DS1 input from the CI to initiate a
logic loopback state in the HRU.
4. ALRM H1ES: HDSL loop 1 has exceeded the 24-hour user-selected Errored Seconds CRC
threshold.
5. ALRM H2ES: HDSL loop 2 has exceeded the 24-hour user-selected Errored Seconds CRC
threshold.
6. ALRM DS1: The total number of bipolar violations (BPV), at the HRU DS1 input, has exceeded
the 24-hour user-selected threshold.
7. ALRM MAL1: The margin on HDSL loop 1 has dropped below the minimum threshold value
set at the maintenance terminal Margin Alarm Threshold option.
8. ALRM MAL2: The margin on HDSL loop 2 has dropped below the minimum threshold value
set at the maintenance terminal Margin Alarm Threshold option.
The Alarm signal between the processors can be enabled or disabled by the user
Alarm option described in Table 10.
The factory default setting of the ALARM option is ENABLED.
Disabling the alarm signal between the processors has no effect on the HDSL
Alarm LED. It will always flash Red to indicate an HLU alarm condition.
Whenever the Alarm signal is asserted, the major alarm LED on the ACU card lights RED and remains on until
the alarm condition clears. In addition, the following message is issued to the MIF terminal when this alarm
occurs:
The following MTI message occurs when the alarm clears:
where X-Y is the SHELF-SLOT CBA location of the HLU 200 List 1D plug.
The three HLU-200 List 1D front panel LEDs function as follows:
•
LOOP - This is a GREEN LED that lights whenever any of the HLU-200 List 1D system
loopbacks are in effect, see Loopback Operation in the Applications Without Using HiGain
Doublers section.
•
FAIL - This is a RED LED that is controlled by the bank. This LED remains lit at all times when
the HLU-200 is used with revision 7.1.1 banks due to a software flaw in 7.1.1. When used with
revision 7.1.2 and higher versions, it lights when the HLU-200 is first plugged into the bank and
remains lit until the bank has finished its program download and handshake with the HLU-200. It
also lights whenever there is a service-affecting failure within the bank.
•
HDSL - This is a tri-colored LED that:
– Flashes GREEN during HDSL sync acquisition on either HDSL loop.
– Flashes RED for any of the alarm conditions described above.
– Is steady GREEN when both HDSL loops are in sync and no minor alarms exist.
– Is steady RED if the onboard 48V fuse opens.
18
"COT X-Y; MJ, LOS, ..."
"COT X-Y; CL: LOS, ..."
November 22, 1996
150-200-114-03, Issue 03
HLU-200 List 1D