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PRELIMINARY
INVERSE MULTIPLEXING OVER ATM
PM7340 S/UNI-IMA-8
DATA SHEET
PMC-2001723
ISSUE 3
INVERSE MULTIPLEXING OVER ATM
PROPRIETARY AND CONFIDENTIAL TO PMC-SIERRA, INC., AND FOR ITS CUSTOMERS’ INTERNAL USE
284
Table 37
IMA Failure Alarm Support
Req.
Failure Alarm
S/UNI-IMA-8 support
R-138
LIF
S/UNI-IMA-8 may generate an interrupt and latch the
internal LIF error status once a link enters or exits
LIF defect.
R-139
LODS
S/UNI-IMA-8 may generate an interrupt and latch the
internal LODS error status once a link enters or exits
LODS defect.
R-140
RFI-IMA
S/UNI-IMA-8 may generate an interrupt and latch the
internal RDI-IMA status when RDI-IMA condition is
entered or exited on a TX link. It is up PM to declare
the alarm condition.
R-141
TX-Mis-Connected
It is up to PM to detect mis-connectivity on TX links,
possibly through the use of test patterns.
FE may indicate that the link is mis-connected by
moving the RX LSM to corresponding UNUSABLE
state, in which case RIPP will generate an interrupt
and latch the error status.
R-142
RX-Mis-Connected
It is up to PM to detect mis-connectivity on RX links.
One possible way is to utilize the RX_IMA_ID field in
the group context. Instead of letting RIPP capture the
RX_IMA_ID from incoming ICP cells, PM can choose
to initialize the group context with a expected
RX_IMA_ID and set the RX_IMA_ID_VALID field to
‘1’. In this case the mis-connected RX links will likely
to have a wrong IMA ID value and will not come up,
which will eventually cause an interrupt.
Also PM may utilize the test pattern procedure for
this purpose.
O-28
TX-Fault
It is up to PM to declare fault conditions on TX links.
To facilitate this, RIPP provides read access to the