EXFO FTB-8100 Series, User Manual

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SONET Tabs
SONET/SDH Application
173
Section RX (SONET)
Alarm Analysis
³
SEF (Severely Errored Framing): A SEF defect indicates that a
minimum of four consecutive errored framing patterns are received.
³
LOF (Loss Of Frame): A Loss Of Frame alarm indicates that a Severely
Error Framing (SEF) defect on the incoming SONET signal persists for
at least 3 milliseconds.
³
TIM-S
(Trace Identifier Mismatch - Section): The TIM-S defect indicates
that the received J0 Trace doesn’t match the expected message value.
The TIM-S alarm is only available when
Enable TIM-S
check box from
J0 Trace section has been selected.
J0 Trace
³
Received Message : Displays the received J0 value. The <crc7>
represents the CRC-7 for a 16-bytes format. The last two bytes of a
64-bytes format, <C
R
> and <L
F
>, represent respectively a carriage
return and a line feed.
³
Enable TIM-S (Trace Identifier Mismatch - Section): Allows enabling
the Trace Identifier Mismatch for the expected message defined.
Enable TIM-S has to be enabled to give access to the expected trace
format and message.
³
Expected Message : Allows entering the expected J0 Trace message. J0
value should be ASCII suitable characters. The default message is
EXFO SONET/SDH for 16 bytes and EXFO SONET/SDH Analyzer
Section/RS trace test message
for 64 bytes.
³
Expected Format : Allows the selection of the expected format: 16 or
64 bytes. The default setting is
16 bytes
.