S/UNI®-ATLAS-3200 Telecom Standard Product Data Sheet
Preliminary
Figure 18 Termination of F4 End-to-End Point Connection
Connection End-Point (End-to-End Point)
Segment End-Point
VCC-AIS-Ete (Connection within a defined segment)
VCC1
VCC2
VCC-AIS-Seg (Connection within a defined segment)
VCC-AIS-EtE (Connection not within a defined segment)
VCC3
VCC-AIS-EtE
VCC-RDI-Seg
F4 (VPC)
VCC-RDI-EtE
VCC4
VCC5
VCC-RDI-Seg
VCC-RDI-EtE
VPC-AIS-EtE
VPC-RDI-EtE
Figure 18 above illustrates the scenario where a VPC is being terminated at an end-to-end point at
the S/UNI-ATLAS-3200. In this scenario, the VPC connection is configured as an end-to-end
point and has its VPC Pointer Active bit set to logic 0. If an end-to-end VPC-AIS cell is received,
it is terminated and an end-to-end VPC RDI cell is generated within 0.5 seconds (assuming the
AUTO_RDI bit is logic 1 in the VC Table). The response of the switched VCCs is as follows:
VCC1 is belongs to a segment flow, therefore both segment and ETE VCC-AIS cells are
generated within 0.5 seconds of noticing that the VPC connection is in AIS alarm, and once per
second (nominally) thereafter until the VPC connection exits the AIS alarm state.
VCC2 belongs to an end-to-end flow, therefore an end-to-end VCC-AIS cell is generated within
0.5 seconds of noticing that the VPC connection is in AIS alarm, and once per second (nominally)
thereafter until the VPC connection exits the AIS alarm state.
VCC3 is a segment end-point, therefore a segment VCC-RDI cell and an end-to-end VCC-AIS
cell are generated within 0.5 seconds of noticing that the VPC connection is in AIS alarm
(assuming the AUTO_RDI bit is logic 1 in the VC Table), and once per second (nominally)
thereafter until the VPC connection exits the AIS alarm state.
VCC4 is an end-to-end point, therefore an end-to-end VCC-RDI cell is generated within 0.5
seconds of noticing that the VPC connection is in AIS alarm (assuming the AUTO_RDI bit is
logic 1 in the VC Table), and once per second (nominally) thereafter until the VPC connection
exits the AIS alarm state.
VCC5 is a segment end-point and an end-to-end point, therefore, a segment VCC-RDI and an
end-to-end VCC-RDI cell are generated within 0.5 seconds of noticing that the VPC connection is
in AIS (assuming the AUTO_RDI bit is logic 1 in the VC Table), and once per second
(nominally) thereafter until the VPC connection exits the AIS alarm state.
Proprietary and Confidential to PMC-Sierra, Inc., and for its Customers’ Internal Use
Document ID: PMC-1990553, Issue 4
113
PMC [ PMC-SIERRA, INC ]
