S/UNI®-ATLAS-3200 Telecom Standard Product Data Sheet
Preliminary
Table 32 PM Table Configuration Field
Bit
15
Name
Source_FwdPM
Description
If this bit is a logic 1, the PM session is configured to source a PM flow,
and a Forward Monitoring cell is output from the S/UNI-ATLAS-3200
once per block of user cells (nominally). Received Forward Monitoring
and Backwards Reporting cells will not be processed by this PM
session. If the session is an F4 session, then any generated F5 Fwd
PM cells, AIS cells, or CC cells will be included in the user cell flow.
If the Source_FwdPM bit is a logic 0, then the PM session is configured
to process received Forward Monitoring and Backwards Reporting cells.
Termination of PM cells depends only on whether the S/UNI-ATLAS-
3200 is configured as an end-to-end or segment end point.
14
Generate_BwdPM
If this bit is a logic 1 and the Source_FwdPM bit is a logic 0, a Backward
Reporting PM cell is generated when an appropriate Forward
Monitoring PM cell is received. The F4_F5B and ETE_SegB bits
determine the type of Forward Monitoring cells that are processed, and
thus the type of Backward Reporting cell that is generated. If the
Fwd_PM0 bit is a logic 1, then a Backward Reporting cell will not be
generated (the Fwd_PM0 bit is cleared upon receipt of the first Forward
Monitoring PM cell).
13
12
F4_F5B
If this bit is a logic 1, this PM address is for a F4 (VPC) PM flow. F5
cells, including OAM cells, are user cells as far as this flow is
concerned.
If this bit is a logic 0, the PM address is for a F5 (VCC) PM flow. F4
OAM cells are ignored.
ETE_SegB
If this bit is a logic 1, this PM address is for an end-to-end PM flow.
Segment PM cells are ignored.
If this bit is a logic 0, this PM address is for a segment PM flow. End-to-
end PM cells are ignored.
Despite the setting of this bit, F5 OAM cells are treated as user cells if
the F4_F5B bit is logic 1.
11
Force_FwdPM
This bit controls the forced insertion of a Forward Monitoring PM cell
when the S/UNI-ATLAS-3200 is configured to insert Forward Monitoring
PM cells. When the Force_FwdPM bit is logic 1, the S/UNI-ATLAS-
3200 will force the insertion of a Forward Monitoring PM cell when the
current cell count of CLP0+1 cells reaches N+N/2, where N is the
programmed block size, regardless of the state of the Forward PM
Pacing register. If this bit is logic 0, then the S/UNI-ATLAS-3200 will
not insert a Forward Monitoring PM cell unless the Forward PM Pacing
register allows for a PM cell to be inserted. This bit has no effect when
Source_FwdPM is logic 0.
[10:9] Threshold_Select[1:0]
These bits are used to index one of four possible threshold selection
register pairs (PM Threshold A1/A2 through PM Threshold D1/D2)
which hold the threshold values for Errored, Misinserted and Lost
Severely Errored Cell Blocks.
Proprietary and Confidential to PMC-Sierra, Inc., and for its Customers’ Internal Use
Document ID: PMC-1990553, Issue 4
122
PMC [ PMC-SIERRA, INC ]
