PXB4219 Datasheet, PDF (50/290 Pages) Infineon Technologies AG – IWE8 Interworking Element for 8 E1/T1 Lines

PXB4219 / PXB4220 / PXB4221
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)
Working
note 1
note 2
OCD
anomally
note 3
LCD defect
note 4
note1
note2
note3
note4
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)
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)
Triggered by 50 continuous ms in the OCD anomaly maintenance state
Triggered by 50 continuous ms in the cell delineation "Sync" state (Fig.5 of ITU-T Recommendation
I.432.1)"
Figure 8 Maintenance state transition diagram for cell delineation events
(Figure 2/ I.432.3)
Data Sheet
50
2002-05-06