S/UNI-IMA-4 Telecom Standard Product Data Sheet
Released
As enabled IMA events occur, a message is placed with the RIPP_INTR FIFO. Once a message
is placed with the FIFO, another message will not be generated until the read_event command is
executed for the group. During this period of time, additional events can accumulate and will be
reported with the Read_event command when executed. The Read_event command queries the
links within the group and provides all of the link and group information in a single data
structure. To ease the processing load, a map that shows which links are experiencing INTR
conditions is provided in page 0 of the returned status. Page 1 contains the interrupt conditions
and page 2 provides the status. The majority of the error/interrupt processing may be performed
with the information provided by the Read_event command.
13.5.16 End-to-end Channel Communication
According to the IMA specification, end-to-end channel is a proprietary communication channel
via the corresponding field in the ICP cells. The S/UNI-IMA-4 provides access to this facility
through the following means:
In the outgoing direction, the end-to-end channel may be updated by writing to the
TX_END_CHANNEL field in the RIPP group configuration record at any time.
In the incoming direction, the end-to-end channel information may be accessed by reading the
ICP cell buffer memory.
Proprietary and Confidential to PMC-Sierra, Inc., and for its customers’ internal use.
Document No.: PMC-2020889, Issue 2
288
PMC [ PMC-SIERRA, INC ]
