PXB4219E Datasheet, PDF (228/290 Pages) Infineon Technologies AG – Interworking Element for 8 E1/T1 Lines

IWE8, V3.4
PXB 4219E, PXB 4220E, PXB 4221E
Application Hints
8.2
Translating AAL Statistics Counters into the ATMF CES Version
2 MIB
Reset Statistics Counters and µP RAM variables before connection setup
atmfCESReassCells
Accumulated values from IWE8 Statistics Counter #2 destructive read accesses
atmfCESHdrErrors
Accumulated values from IWE8 Statistics Counter #6 destructive read accesses
atmfCESPointerReframes
CES Version 2.0 MIB recommends "This records the count of the number of events in
which the AAL1 reassembler found that an SDT pointer is not where it is expected, and
the pointer must be reacquired.“
"Pointer is not where it is expected" can mean.
a) no pointer occurs within an 8-cell-cycle
b) two pointers occur within an 8-cell-cycle
c) pointer is not in the 2nd byte of ATM cell payload,
Error case a) and b) causes incrementation of Statistics Counter #11.
All error cases a), b) and c) causes loss of synchronization of AtmStartOfStructure (IWE8
reassembly buffer read pointer to structure start in ATM cell) with PortStartOfStructure
(pointer to structure start in framer interface port), so that Statistics Counter #14
increments.
==> Accumulated values from IWE8 Statistics Counter #14 destructive read accesses.
atmfCESPointerParityErrors
Accumulated values from IWE8 Statistics Counter #10 destructive read accesses
atmfCESAal1SeqErrors
Accumulated values from IWE8 Statistics Counter #7 destructive read accesses
atmfCESLostCells
Accumulated values from IWE8 Statistics Counter #15 destructive read accesses
atmfCESMisinsertedCells
Accumulated values from IWE8 Statistics Counter #8 destructive read accesses
Data Sheet
228
2003-01-20