Network Service Entity Unavailalbe alarm

This alarm related with Gb-link status at DX200 BSC.
Generaly – it comes because of 3 reasons:

1) Transmission problems
2) BCSU(PCU) unit problems
3) Configuration problems.

First check transmission consistency and status of serving units.

Usefull commands:

ZFUI;
ZFWO:BCSU,0&&6;
ZAHO;