Maintenance Description
Issue 8.0 July 2002
9-21
OC12 lockout at far-end The protection line is locked out and will not
be used to protect a service line failure at
the near end of the OC-12 line.
OC12 lockout at near-end The protection line is locked out and will not
be used to protect a service line failure at
the near end of the OC-12 line.
OC12 loopback (from OC48) The STS-12/12c signal from the OC-48 line
is looped back to the OC-48 line.
incoming OC-48 AIS An OC-48 alarm indication signal (AIS) has
been detected on an incoming OC-48 line.
Likely cause: Failure of an upstream
REGENR or TRMTR circuit pack.
incoming OC-48 APS byte fail This condition is associated with a signal
degrade (SD) or an automatic protection
switch (APS) channel failure on the
protection line.
incoming OC-48 APS default byte This condition is normally a transient
condition caused by a "Reset in Progress"
condition at an upstream OC-48 source.
incoming OC48 B1 parity error A parity error has been detected in the B1
SONET overhead byte at a repeater bay
site. Likely cause: Failure of the upstream
TRMTRorREGENRcircuitpack,orthe
local RCVR or REGENR.
incoming OC-48 invalid F byte An invalid SONET overhead F byte has
been detected at a repeater bay site. Likely
cause: Failure of the upstream TRMTR or
REGENR circuit pack, or the local RCVR or
REGENR.
LCLAN failure This condition indicates that a failure has
been detected in the Line Controller
(LNCTL) or in the System Controller
(SYSCTL).
incoming OC-48 line RFI/yellow The remote FT-2000 terminal is receiving a
line failure from the local FT-2000 terminal.
The remote FT-2000 terminal is notifying the
local FT-2000 terminal of the failure.
Likely causes: Failure of an outgoing OC-48
line (transmit fiber). Failure of local TRMTR
circuit pack, remote RCVR circuit pack, or
intervening REGENR circuit packs.
Table 9-2. Condition Descriptions (Contd)
Description (from Retrieve-Alarm Report) Meaning
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