pxb4219 Infineon Technologies Corporation, pxb4219 Datasheet - Page 50

• Manufacturer Part Number: pxb4219
• Description: Iwe8 Interworking Element For 8 E1/t1 Lines
• Manufacturer: Infineon Technologies Corporation

• 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
Bit by bit
incorrect HEC
Cell delineation state diagram (Figure 5/I.432.1)
Maintenance state transition diagram for cell delineation events
(Figure 2/ I.432.3)
HUNT
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)"
Cell by
cell
SYNC
note 1
note 2
Incorrect HEC
Correct HEC
DELTA consecutive
anomally
note 4
OCD
correct HEC
50
PXB4219 / PXB4220 / PXB4221
note 3
PRESYNC
Operational Description
Cell by
LCD defect
cell
2002-05-06