S/UNI®-ATLAS-3200 Telecom Standard Product Data Sheet
Preliminary
VCC1 belongs to a segment flow, therefore, both End-to-End and segment VCC-AIS cells are
generated within 0.5 seconds of noticing that the end-to-end VPC connection is in AIS alarm.
VCC1 will continue to generate ETE and segment VCC-AIS cells at a rate of one per second
(nominally) while the VPC connection is in AIS alarm (i.e the AIS_end_to_end alarm bit is
asserted for the end-to-end VPC connection).
VCC2 does not belong to a segment flow, therefore, an end-to-end VCC-AIS cell is generated
within 0.5 seconds of noticing that the VPC connection is in end-to-end AIS alarm. VCC2 will
continue to generate end-to-end VCC-AIS cells at a rate of one per second (nominally) while the
VPC connection is in AIS alarm (i.e. the AIS_end_to_end alarm bit is asserted for the VPC
connection).
VCC3 is a segment end-point, therefore a segment VCC-RDI cell (assuming the AUTO_RDI bit
is logic 1 in the VC Table) and an end-to-end VCC-AIS cell are generated for this connection
within 0.5 seconds of noticing that the VPC connection is in end-to-end AIS alarm. VCC3 will
continue to generate segment VCC-RDI and end-to-end VCC AIS cells at a rate of one per second
(nominally) while the VPC connection is in end-to-end AIS alarm (i.e. the AIS_end_to_end alarm
bit is asserted for the VPC connection).
VCC4 is a connection end-point, therefore an end-to-end VCC-RDI cell is generated (assuming
the AUTO_RDI bit is logic 1 in the VC Table) within 0.5 seconds of noticing that the VPC
connection is in end-to-end AIS alarm. VCC4 will continue to generate end-to-end VCC-RDI
cells at a rate of one per second (nominally) while the VPC connection is in end-to-end AIS alarm
(i.e the AIS_end_to_end alarm bit is asserted for the VPC connection).
VCC5 is a segment end-point and a connection end-point, therefore a segment VCC-RDI cell and
an end-to-end VCC-RDI cell are generated (assuming the AUTO_RDI bit is logic 1 in the VC
Table) within 0.5 seconds of noticing that the VPC connection is in end-to-end AIS alarm. VCC5
will continue to generate segment VCC-RDI and end-to-end VCC-RDI cells at a rate of one per
second (nominally) while the VPC connection is in end-to-end AIS alarm (i.e. the
AIS_end_to_end alarm bit is set).
The next scenario has the same connection configurations, however, a VPC-Segment AIS cell is
received.
Proprietary and Confidential to PMC-Sierra, Inc., and for its Customers’ Internal Use
Document ID: PMC-1990553, Issue 4
110
PMC [ PMC-SIERRA, INC ]
