S/UNI®-ATLAS-3200 Telecom Standard Product Data Sheet
Preliminary
Name
Description
Bwd TRCC_0+1
Total Received CLP0+1 User Cell Count for Backwards Reporting cells. This field
stores the TRCC_0+1 value received from the most recent Backwards Reporting
cell, and is used along with the TRCC_0+1 field of newly received Backwards
reporting cells to determine the number of user cells received by the far end point
between successive Forwards Monitoring cells. This count will be initialized
automatically on reception of the first Bwd PM cell.
(16)
Bwd TUC_0 (16)
Total CLP0 User Cell Count for Backwards Reporting PM Cells. This field stores the
value of TUC_0 received from the most recent Backwards Reporting cell, and is
used with a newly received Bwd PM cell’s TUC_0 to determine the number of cells
transmitted by the Forward Monitoring source point between successive Forward
PM cells. This count will be initialized automatically on reception of the first Bwd PM
cell.
Bwd TUC_0+1
(16)
Total CLP0+1 User Cell Count for Backwards Reporting PM Cells. This field stores
the value of TUC_0+1 received from the most recent Backwards Reporting cell, and
is used with a newly received Bwd PM cell’s TUC_0+1 to determine the number of
cells transmitted by the Forward Monitoring source point between successive
Forward PM cells. This count will be initialized automatically on reception of the first
Bwd PM cell.
Bwd FMCSN (8)
Bwd BMCSN (8)
This field contains the Fwd MCSN copied from the most recently received
Backwards Reporting cell. It is used to infer the loss of Forward Monitoring cells at
the far end point. If the Bwd FMCSN is out of sequence, then the Bwd Lost Fwd
PM Cells count is incremented by the number of lost Fwd PM cells, which is
presumed to be equal to the change in FMCSN less the change in BMCSN. Any
inference of SECBs due to lost Fwd PM cells is left up to the management software.
This field contains the MCSN copied from the most recently received Backwards
Reporting cell. It is used to infer the loss of Backwards Reporting cells. If the
received Backwards Reporting MCSN is out of sequence, then the Bwd Lost Bwd
PM Cells Count will be incremented by the number of missed MCSNs. All other
processing will proceed as normal.
Fwd Errored Cell
Count (8)
The Errored Cell Count represents the number of BIP-16 violations (BIPV) during a
PM session (on CLP0+1 cells). The Errored Cell counter is incremented whenever
the number of BIPV is greater than 0 and less than MERROR in the selected
threshold register, so long as there are no lost or misinserted cells, and the MCSNs
are in sequence.
Bwd Errored Cell
Count (8)
Fwd Impaired
Blocks (8)
The Impaired Block count represents the sum of PM cell blocks containing at least
one BIP error, lost cell or misinserted cell (CLP0+1
Bwd Impaired
Blocks (8)
Fwd Lost/
The Lost/Misinserted Impaired Block count represents the sum of the PM cell blocks
for which there was at least one lost or misinserted cell (CLP0+1). The
Misinserted
Impaired Blocks (8) Lost/Misinserted Block Impaired Block count is incremented whenever there is a
Bwd Lost/
non-zero TUCD_0+1.
Misinserted
Impaired Blocks (8)
Fwd SECB Errored Severely Errored Cell Block Errored Cells (CLP0+1). The SECB Errored is
(8) incremented whenever the number of BIPV errors exceeds MERROR in the
Bwd SECB Errored selected threshold register, and there are no lost/misinserted cells, and the MCSNs
(8)
are in sequence. The accumulation of SECB Errored inhibits the accumulation of
the count of BIP Errors.
Proprietary and Confidential to PMC-Sierra, Inc., and for its Customers’ Internal Use
Document ID: PMC-1990553, Issue 4
126
PMC [ PMC-SIERRA, INC ]
