PXB4340E Datasheet, PDF (44/185 Pages) Infineon Technologies AG – ICs for Communications

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The arbitrary assignment of PM processors to connections also allows e.g. to terminate a
Segment PM flow and generate a new Segment PM flow for the same connection within one
PXB 4340 AOP as shown in ILJXUH .
Segment FM flow
Segment BR flow
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PM entry ‘
’ PM entry
Segment FM flow
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x, y, z independent, any
value between 0 and 127
PM = Performance Monitoring
DC = Data Collection
“ DC entry

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Segment BR flow
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These cell types are generated by the microprocessor and transmitted via the cell insertion
function (VHFWLRQ ) of the PXB 4340 AOP.
The detection and extraction of activation/deactivation cells is done automatically at the
respective segment or end-to-end points if the PXB 4340 AOP is configured correctly and the
function is enabled (which is possible per connection). Extracted cells are stored in the receive
buffer (VHFWLRQ ).
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The PXB 4340 AOP does failure propagation automatically, e.g. a received VP-AIS cell
automatically leads to the generation of VC-AIS and VP-RDI cells at the VP endpoint. Also the
generation of AIS/RDI as a consequence of LOC state is done automatically. Failure
propagation from degraded performance, detected with the PM function, to AIS/RDI insertion,
however is not done automatically, but must be initiated by the microprocessor.
To enforce VP-level AIS/RDI insertion command bits are available per connection. If enabled the
PXB 4340 AOP automatically inserts VC-AIS cells for all VCCs of a VPC.
Connection specific AIS state is left when user or CC cells are detected. Only end-to-end cells
may react in this way with AIS because "shorter" CC flows such as segment CC or ICC may
cause a mixture of AIS and SCC/ICC cells which would corrupt AIS recognition in the cases a)
Data Sheet
2-44
04.2000