PXB4219E Datasheet, PDF (47/290 Pages) Infineon Technologies AG – Interworking Element for 8 E1/T1 Lines

IWE8, V3.4
PXB 4219E, PXB 4220E, PXB 4221E
Operational Description
• for the Cell-based Physical Layer, ALPHA = 7 and DELTA = 8.
• for the Frame-based Physical Layer, ALPHA = 7 and DELTA = 6.
• for other systems, values for ALPHA and DELTA are for further study.
Bit by bit
HUNT
Correct HEC
Incorrect HEC
PRESYNC
Cell by
cell
ALPHA consecutive
incorrect HEC
DELTA consecutive
correct HEC
SYNC
Cell by
cell
Note - The "correct HEC" means the header has no bit error (syndrome is zero) and has not
been corrected
Figure 7 Cell delineation state diagram (Figure 5/I.432.1)
I432-1-Fig5
Working
note 1
note 2
OCD
anomally
note 3
LCD defect
note 4
note1
Triggered by state transition (Case A) due to alpha consecutive incorrect HEC´s in the cell
delineation process (Fig. 5 of ITU-T Recommendation I.432.1)
note2
Triggered by state transition (Case B) due to delta consecutive correct HEC´s in thecell delineation
process (Fig. 5 of ITU-T Recommendation I.432.1)
note3
Triggered by 50 continuous ms in the OCD anomaly maintenance state
note4
Triggered by 50 continuous ms in the cell delineation "Sync" state (Fig.5 of ITU-T Recommendation
I.432.1)"
I432-3-Fig2
Figure 8 Maintenance state transitions for cell delineation (Figure 2/ I.432.3)
Data Sheet
47
2003-01-20