ITU-T Rec. I.604 (11/1988) – Application of maintenance principles to ISDN primary rate accesses
1 Scope of application
2 Network configuration for maintenance activities
3 Failure detection
4 System protection
5 Failure indication
6 Failure localization
7 Logistic delay time
8 Failure connection
9 Verification
10 Restoration
11 Overall performance measurements
ANNEX A (to Recommendation I.604) – Subscriber access option