Table of Contents
Advertisement
TAP-107
: Trouble Clearing
Page 19 of 28
Table B – RTRV-ALM Message Descriptions (Continued)
Description
inc. OC3 LOF
inc. OC3 LOS
inc. OC3 line AIS
inc. OC3 sig degrade (BER)
inc. OC3 sig failed (BER)
inc. OC12 FERF
Alarm
Level
CR or MN The system has detected a loss-of-frame (LOF)
CR or MN The system has detected loss-of-signal (LOS)
CR, MJ,
MN, or
None
CR or MN The bit error ratio (BER) in the specified OC-3 line
CR or MN The bit error ratio (BER) in the specified OC-3
NE ACTY
DDM-2000 OC-3 M
Issue 2, February 2000
Meaning
condition in an incoming OC-3 signal. LOF is
defined as an out-of-frame (OOF) condition (five
consecutive errored STS-1 framing patterns) that
lasts for at least 3 milliseconds.
Likely causes: Failure of the OLIU circuit pack at
the near end, failure of the OLIU circuit pack at the
far end, or failure of the receive fiber.
condition on the OC-3 line.
Likely causes: Failure of the OLIU circuit pack at
near end, failure of the OLIU circuit pack at far end,
or failure of the receive fiber.
The system has detected OC-3 line alarm
indication signal (AIS) on an incoming OC-3 line.
Likely cause: Failure of an OLIU circuit pack at the
far end.
exceeds the provisioned soft error threshold (10
–5
to 10
) but below the hard error threshold of 10
Likely causes: Failure of the OLIU circuit pack at
the near end, failure of the OLIU circuit pack at the
far end, failure of the receive fiber, or incorrect
setting of the optical power switch on the OLIU
circuit pack.
–3
signal exceeds 10
.
Likely causes: Failure of the OLIU circuit pack at
the near end, failure of the OLIU circuit pack at the
far end, or failure of the receive fiber.
The system has detected the OC-12 far end
receive failure (FERF) signal in the incoming
OC-12 signal.
Likely causes: The far end has detected an
incoming signal failure on the specified OC-12 line.
This may be caused by failure of the OLIU circuit
pack at the near end, the OLIU circuit pack at the
far end, or the transmit fiber on the specified line.
ULTIPLEXER
363-206-285
–9
–3
.
Hide quick links:
Advertisement
Table of Contents
