PM7340 S/UNI-IMA-8
PRELIMINARY
INVERSE MULTIPLEXING OVER ATM
DATA SHEET
PMC-2001723
ISSUE 3
INVERSE MULTIPLEXING OVER ATM
Table 37
IMA Failure Alarm Support
Req.
Failure Alarm
LIF
S/UNI-IMA-8 support
R-138
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
R-140
LODS
S/UNI-IMA-8 may generate an interrupt and latch the
internal LODS error status once a link enters or exits
LODS defect.
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
R-142
TX-Mis-Connected
RX-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.
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
PROPRIETARY AND CONFIDENTIAL TO PMC-SIERRA, INC., AND FOR ITS CUSTOMERS’ INTERNAL USE
284
PMC [ PMC-SIERRA, INC ]
