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S/UNI-ATLAS-3200 Telecom Standard Product Data Sheet
Preliminary
Proprietary and Confidential to PMC-Sierra, Inc., and for its Customers’ Internal Use
Document ID: PMC-1990553, Issue 4
142
Source[1:0]:
The source of the cell, encoded as follows:
00 : Input Cell Interface
01 : Backwards Cell Interface
10 : Generated Forward PM, AIS, or CC cell
11 : Reserved.
End_to_End_Point:
Indicates the connection is provisioned as an OAM flow end point. If the
cell type indicates an unprovisioned connection, search error, or cell transfer error, this bit is not
valid.
Segment_End_Point:
Indicates the connection is provisioned as an OAM flow segment end
point. If the cell type indicates an unprovisioned connection, search error, or cell transfer error,
this bit is not valid.
TimeOut:
Indicates the cell was removed from a Backward Cell Interface or Microprocessor Cell
Interface because the head-of-line blocking timer has expired, or the associated PHY has been
declared inoperative. When this bit is set, only the SOURCE, PHYID and TYP fields are valid.
NNI:
Indicates the connection is associated with a Network-Network Interface (NNI). A logic 0
means the connection belongs to a User-Network Interface (UNI).
VPC:
Indicates the connection is provisioned as a Virtual Path Connection (VPC). A logic 0
means the connection is provisioned as a Virtual Channel Connection (VCC).
OAM_Type:
A logic 1 identifies a segment OAM cell. A logic 0 identifies an end-to-end OAM
cell. This bit is only valid when the cell type indicates one of the OAM types.
TYP[4:0]:
Cell type. This field is encoded as follows:
TYP[4:0]
Cell Type
00000
User
00001
OAM AIS
00010
OAM RDI
00011
OAM Continuity Check
00100
OAM Parent Loopback
00101
OAM Returned Loopback
00110
OAM Forward Monitoring PM
00111
OAM Backward Reporting PM
01000
OAM Automated Protection Switching
01001
OAM Activate/Deactivate
01010
OAM Undefined
01011
OAM System Management
01100
Forward RM
01101
Backward RM
01110
Invalid PTI/VCI
01111
Unprovisioned Connection