PXB4220E Infineon Technologies AG, PXB4220E Datasheet - Page 47

• Manufacturer Part Number: PXB4220E
• Description: Interworking Element for 8 E1/T1 Lines
• Manufacturer: Infineon Technologies AG

• 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.
Figure 7
Figure 8
Data Sheet
note1
note2
note3
note4
Note - The "correct HEC" means the header has no bit error (syndrome is zero) and has not
been corrected
ALPHA consecutive
Working
Cell delineation state diagram (Figure 5/I.432.1)
Maintenance state transitions for cell delineation (Figure 2/ I.432.3)
Bit by bit
incorrect HEC
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
HUNT
I.432.1)"
Cell by
cell
SYNC
note 1
note 2
Incorrect HEC
Correct HEC
DELTA consecutive
anomally
note 4
OCD
47
correct HEC
PXB 4219E, PXB 4220E, PXB 4221E
note 3
PRESYNC
Operational Description
LCD defect
Cell by
cell
IWE8, V3.4
2003-01-20
I432-1-Fig5
I432-3-Fig2