VeEX MPA User Manual page 313

MPA_e_manual_D07-00-129P_RevA00
Protocol Tabs
RDI-P
UNEQ-P
UNEQ-V
RDI-V
RFI-V
313
equipment (PTE).
Path Remote Defect Indicator. This generates an RDI-P
condition using the G1 byte of the Path OH.
This simulates a downstream NE (in this case, the test unit),
at the Path layer, reporting a failure to an upstream NE.
To do this, the system changes the pattern of the G1 byte in
the Path OH. The NE receiving the RDI-P alarm should
detect a change to the G1 byte on the incoming SONET
signal.
Path Unequipped Alarm. An all-zeros pattern is inserted into
the C2 byte of the Path OH. The C2 byte is the STS Path
Signal Label. (This type of error is used between Path
terminating equipment - PTE)
When a PTE receives this alarm, it will generate an AIS to
downstream NEs.
Virtual Tributary Unequipped Alarm. An all-zeros pattern is
inserted into the V5 byte of the VT OH. The V5 byte is the VT
Signal Label.
Only available when a VT mapping is selected.
Virtual Tributary Remote Defect Indicator. This generates a
RDI-V condition using the V5 byte of the VT OH.
This simulates a downstream NE at the VT layer, reporting a
failure to an upstream NE.
To do this, the system changes the pattern of the V5 byte in
the VT OH. The NE receiving the RDI-V alarm should detect
a change to the V5 byte on the incoming signal.
Only available when a VT mapping is selected.
Virtual Tributary Remote Failure Indication. This generates
an RFI-V alarm downstream to initiate a VT protection switch.