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ATM Physical layer
ATM cells. For screening of cells matching the receive header and mask
criteria.
- Header. Values in binary form (0, 1 and x for mask use).
- Screening:
- Accepted. Cells with matching header will be accepted.
- Discarded. Cells with matching header will not be accepted.
Idle cells. For screening of cells matching the receive idle header
and mask criteria.
- Idle header. Values in binary form (0, 1 and x for mask use).
- Screening:
- Accepted. Cells as idle ones will be accepted.
- Discarded. Cells as idle ones will not be accepted.
Basic options. Framing options relative to the transmit and receive
parts of the physical interface.
- Cell delineation via HEC alignment
Yes. 53 octet cells are expected.
For use in modes where cells are directly mapped into the physical layer: DS1, E1, DS3. No.
- HEC covers octets 2-4 (SMDS)
-
Yes. The HEC (Header Error Control) is calculated over
header octets 2-4 for SMDS/802.6 cells.
- No.
The HEC is calculated over header octets 1-4 for ATM
cells.
- HEC XORed with polynomial x6+x4+x2+1
-
Yes. Enables the x6+x4+x2+1 polynomial to be XORed with the
calculated HEC prior the transmission and prior to error detection/correction.
- No.
- NRZ data encoding
-
Yes. Use NRZ encoding.
- No.
Use B3ZS/HDB3 encoding.
Simulation options. Framing options only relative to the transmit part
of the physical interface
- Transmit clock sourced from receive
clock
-
Yes. Transmit clock sourced from receive clock.
- No.
Internal transmit clock.
- Use internal 8khz PLCP reference
-
Yes. Transmit PLCP is synchronised by an internal 8KHz ref.
- No.
Transmit PLCP is synchronised with the received PLCP.
- Force cycle stuffing
-
Yes. Force the default stuffing operations in DS3 and G751
E3 PLCP modes.
- No.
Stuffing is performed to synchronise transmit PLCP with
8 KHz frame reference (internal or received PLCP).
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