VeEX MPA User Manual page 432

MPA_e_manual_D07-00-129P_RevA00
MS-RDI
AU-LOP
AU-AIS
HP-RDI
An MS-AIS simulates an alarm generated by Line terminating
equipment (LTE).
Multiplex Section Remote Defect Indicator. This generates an
MS-RDI condition using the K2 byte of the Line OH.
This simulates a downstream NE at the Line layer, reporting
a failure to an upstream NE. The downstream NE has
encountered a downstream failure and is alerting upstream
SDH equipment.
To do this, the system changes the pattern of the K2 byte.
The NE receiving the MS-RDI alarm should detect a change
to the K2 byte on the incoming SDH signal. This forces the
NE to generate a Remote Alarm Indicator (RAI) to its
upstream NEs.
Administrative Unit Loss of Pointer. This simulates a loss of a
valid Pointer. When the downstream NE receives an AU-
LOP, it generates a DSn AIS alarm to its downstream
equipment and an HP-RDI alarm to its upstream equipment.
Administrative Unit Alarm Indication Signal. The transmission
of an AU-AIS to a downstream NE forces that NE to send an
AIS alarm to the next downstream NE. The NE will also send
an RDI alarm to its upstream equipment.
An AU-AIS simulates an alarm generated by Path terminating
equipment (PTE).
Higher-Order Path Remote Defect Indicator. This generates
an HP-RDI condition using the G1 byte of the Higher-Order
Path OH.
This simulates a downstream NE 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 HPOH. The NE receiving the HP-RDI alarm should detect
a change to the G1 byte on the incoming SDH signal.
SDH Tab
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