PXB4220E Infineon Technologies AG, PXB4220E Datasheet - Page 39
PXB4220E
Manufacturer Part Number
PXB4220E
Description
Interworking Element for 8 E1/T1 Lines
Manufacturer
Infineon Technologies AG
Datasheet
1.PXB4220E.pdf
(290 pages)
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Table 11
Block
UL
DL
UT
CT
Data Sheet
Functions
Upstream Loop
• Cell loopback from Cell Receive to Cell Transmit processing
• Loopback buffer for 4 cells
Downstream Loop
• Cell loopback from UTOPIA Transmit to UTOPIA Receive
• Loopback buffer for 4 cells
UTOPIA Transmit interface
• Cell level handshake
• Evaluation of framer port number from ATM header in UTOPIA level 1
• Input buffer for 4 cells
Cell Transmit processing
Port and channel identification
ATM ports:
• Write cells to ATM transmit buffer
AAL ports:
• Port and channel identification
• SNP field check
• SN field check
• SDT pointer detection and verification
• RTS value extraction
• Extracting reassembly buffer filling for ACM
• CAS processing
• Statistics counter event generation
• Insertion of dummy cells at cell loss
• Write to Reassembly Buffer
Functions of IWE8 Blocks (cont’d)
mode and UTOPIA level 2 singel PHY mode
39
PXB 4219E, PXB 4220E, PXB 4221E
Functional Description
IWE8, V3.4
2003-01-20
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