Nortel DMS 100 Series Maintenance Manual page 76

2-60 Maintenance overview
The sequence of events that the REX test state machine or controller performs
are as follows:
1. Test the inactive unit (includes INSV tests only).
2. SysB the inactive unit.
3. RTS the inactive unit. This action includes out-of-service (OOS) tests
4. Wait for superframe and data synchronization to occur.
5. Perform a pre-SWACT audit.
6. Perform a warm SWACT.
7. Maintain call processing capability on previously active unit.
8. Perform a post-SWACT audit.
9. SWACT back to the previous active unit if necessary.
10. SysB the new inactive unit.
11. RTS the inactive unit.
12. Wait for superframe and data synchronization to occur.
13. Run INSV diagnostics (TST) on the newly active unit.
14. Run INSV diagnostics (TST) on the inactive unit.
The following figure shows REX state machine (controller) actions.
297-8223-550 Standard 04.02 November 2000
only.