cn8236 Mindspeed Technologies, cn8236 Datasheet - Page 240

• Manufacturer Part Number: cn8236
• Description: Atm Servicesar Plus With Xbr Traffic Management
• Manufacturer: Mindspeed Technologies

7.0 OAM Functions
7.3 Reassembly of OAM Cells
7.3.2 OAM Reassembly Operation
7.3.3 Error Conditions During OAM Reassembly
7-10
Received OAM traffic should be detected and routed to the global OAM buffer
and status queues (OAM_BFR_QU and OAM_STAT_QU).
coprocessor transfers the 48-octet OAM payload to the next available global data
buffer and writes a RSM status queue entry.
determine whether it is a PM cell by seeing if the OAM_TYPE field in the cell is
set to value 0010. That PM detection is only performed on F4 and F5 OAM cells.
the guidelines described in
NOTE:
The RSM coprocessor computes the CRC-10 error detection code each received
OAM cell’s information fields. If an error is detected (for example, the computed
CRC value does not match the CRC-10 value written in the cell), the SAR sets the
CRC_ERROR bit in the status queue entry to a logic high.
The reassembly coprocessor treats OAM cells as one-cell PDUs. The RSM
Once an OAM cell is detected, the RSM coprocessor checks the cell to
If the RSM coprocessor finds the cell is a PM cell, it is processed following
OAM cells that get buffers from the global OAM free buffer queue do not
effect the per-VCC firewall calculation.
Mindspeed Technologies
Section
ATM ServiceSAR Plus with xBR Traffic Management
7.4.
™
28236-DSH-001-B
CN8236