
PRELIMINARY
INVERSE MULTIPLEXING OVER ATM
PM7341 S/UNI-IMA-84
DATASHEET
PMC-2000223
ISSUE 4
INVERSE MULTIPLEXING OVER ATM
PROPRIETARY AND CONFIDENTIAL TO PMC-SIERRA, INC., AND FOR ITS CUSTOMERS’ INTERNAL USE
380
exits LODS defect.
R-140
RFI-IMA
S/UNI-IMA-84 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
NE/FE LSM and GSM states in the context memory.
O-29
RX-Fault
It is up to PM to declare fault conditions on RX links.
To facilitate this, RIPP provides read access to the
NE/FE LSM and GSM states in the context memory.
R-143
TX-Unusable-FE
S/UNI-IMA-84 may generate an interrupt and latch
the internal FE_TX_Unusable error status, once FE
TX LSM enters UNUSABLE state.
R-144
RX-Unusable-FE
S/UNI-IMA-84 may generate an interrupt and latch
the internal FE_RX_Unusable error status, once FE