Tab le of Con tents
Issue 3 June 2001 9-i
9
Maintenance Description
Overview 9-1
■ Three-Tiered Operations 9-1
Single-Ended Maintenance Philosophy 9-4
■ Multi-Vendor OI 9-6
■ SEO Network Element Status Using Alarm Gateway NE 9-7
In-Service Upgrades 9-9
■ Software Upgrades 9-9
Software Compatibility 9-10
Maintenance Signaling 9-12
■ Non-Ring Interfaces 9-14
■ Ring Applications 9-18
Fault Detection, Isolation, and Reporting 9-23
■ Detection 9-23
■ Isolation 9-23
■ Reporting 9-23
Protection Switching 9-24
■ Automatic Line Protection 9-24
Status of ACTIVE LED on OLIUs 9-24
APS Initiation Criteria 9-25
■ Path Protection Switching (Path Switched Rings) 9-27
Path Protection Scheme 9-29
Path Protection - Locked DS3 Cross-Connect 9-31
■ Dual Ring Interworking (DRI) 9-32
To Next Page
Loading...