VeEX MTX150 Series, Руководство пользователя

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221 © VeEX Inc. All Rights Reserved. Fiber Channel
The unit supports the generation and monitoring of: bit errors, order sets, frame delimiters, frame transmission,
and generation of primitive sequences. BERT diagnostics perform a bit-by-bit comparison to find bit errors in
the received data pattern. Error Count and Error Rate for the latest sample are displayed and maintained, as
well as totals for all samples from the test start.
The user can use a default frame header or define a custom frame header - the unit takes care of the frame/-
header setup, creates the user defined SOF and EOF delimiters and calculates the CRC error checking bytes,
which are placed within the frame. User defined bytes, fixed patterns or industry standard PRBS patterns can
be selected from drop-down menus and radio buttons and inserted into the payload field.
Testing is supplemented with the capability to perform Bit and CRC error insertion. These tests allow users to
test their own Mux demux equipment for error monitoring and detection. The test set displays the BERT test
results continuously and any anomaly is recorded in an event log which is date and time stamped. All results
can be saved and exported into ReVeal MX for analysis or customer test report generation.
Fiber Channel Layers
The Open Systems Interconnect (OSI) model breaks communications into seven layers namely, Physical,
Data Link, Network, Transport, Session, Presentation, and Application. Fibre Channel does not follow the ISO
model - instead, the protocol has been broken into five layers: FC-0, FC-1, FC-2, FC-3, and FC-4.
OSI layers versus FC layers