Chapter 5. Diagnostics
206
Alarm Severity Report
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History
Description
Prov Bus Err Info No Yes Tx and/or Rx failed over the provisioning bus.
Diagnostics
Err
Info No No Card diagnostics failed.
LINE T1-1
LPBK
Info Yes Yes The T1-1 span is looped back towards the network. Message at
the looped end.
LINE T1-2
LPBK
Info Yes Yes The T1-2 span is looped back towards the network. Message at
the looped end.
PAYLOAD
T1-1 LPBK
Info Yes Yes The T1-1 span is looped back towards the network. Message at
the looped end.
PAYLOAD
T1-2 LPBK
Info Yes Yes The T1-2 span is looped back towards the network. Message at
the looped end.
CGA Info Yes Yes Carrier Group Alarm signal produced 2.5 s after loss of T1
framing. Has a 10-s minimum release time.
DCGA Info No No Delayed Carrier Group Alarm signal is produced 0-20 seconds
after CGA is set.
Req Remote
LLB
Info No Yes Loop initiated from the local LIU.
REMOTE
Loop
Info No No T1 span is looped back towards the network. Message at the
looped end.
CLOCK
Change
Info No Yes Reports a clock change event.
RCVD Clk
Freq Err
Info No Yes The recovered clock shifted from the Stratum 4 clock
specifications.
INT Clk Freq
Err
Info No Yes The internal clock shifted from the Stratum 4 clock specifications.
EXT2 Clk
Freq Err
Info No Yes Slot-2 clock shifted from the Stratum 4 clock specs.
EXT9 Clk
Freq Err
Info No Yes DB-9 clock shifted from the Stratum 4 clock specs.
EXT CLK Fail Info Yes Yes External clock failed. (DB-9, Slot-2, etc.)
Event Trigger Info Yes Yes Event input is grounded. Event map is on.
Event Map
Sw
Info No Yes Switched to an event map.
Time Map Sw Info No Yes Switched to a time map.
Alarm Map Sw
Info No Yes Switched to an alarm map.
Task error Info No Yes Task switching error.
Man. Map Sw Info No Yes Switched to a manual map.
TTU Red
Alarm
Info No Yes Loss of frame reported by Tandem T1 Channel Unit (TTU).
TTU Yellow
Alarm
Info No Yes Bit 2 = Zero for all 24 DS0s received or yellow alarm in FDL of
ESF on Tandem T1 Channel Unit (TTU).