Nortel DMS-100 Series Maintenance Manual page 56

1-40 Maintenance overview
SWACT back example
1.
ISTb
Unit 0
InSv
Unit 1
Active
Inactive
4.
SWACT refused
by SWACT
Controller
7.
ISTb
Unit 0
InSv
Unit 1
Active
Inactive
297-8231-550 Standard 09.01 August 1998
2.
>SW ACT
5.
>SWACT FORCE
1. Both units are in service. Unit 0 is active.
2. The user attempts a Warm SWACT from unit 0 to unit 1.
3. The SWACT controller in the CM polls PM diagnostic
history data in the CM and XPM state data in the XPM.
4. Polled data determines that the SWACT controller denies
a user's request for a Warm SWACT.
5. Override the SWACT controller.
6. Unit 0 drops activity. Unit 0 remains in service while post-
SWACT audits are run on unit 1.
7. Post-SWACT audits detect a problem in unit 1 that causes
a SWACT back to unit 0.
3.
SWACT
controller
Data polling
PM
diagnostic
XPM status
history
6.
ISTb
Unit 0
InSv
Unit 1
Active
Inactive