Contents
Issue 3 June 2000
9-i
9
Maintenance Description
Overview
9-1
■
Wideband Shelf Maintenance 9-1
Single-Ended Maintenance Philosophy 9-1
Three-Tiered Operations 9-3
■
User Panel and Faceplate LEDs
(Operations Tier 1) 9-4
■
Craft Interface Terminal (CIT)
(Operations Tier 2) 9-5
■
Operations System (OS) Interface
(Operations Tier 3) 9-6
Miscellaneous Discretes 9-6
TL1/X.25 9-6
Multi-Vendor OI
9-7
Inservice Upgrades
9-10
Maintenance Signaling
9-10
Fault Detection, Isolation, and Reporting
9-13
■
Detection 9-13
■
Isolation 9-13
■
Reporting 9-13
Protection Switching
9-14
■
Path Protection Switching (Path Switched Rings) 9-14
■
OC-3/OC-1 Ring Interworking 9-17
■
OC-3/OC-1 Path Switched Ring (0x1) 9-17
Single-Homed Interworking Application 9-18
9-18
9-17
9-17
9-14
9-14
9-13
9-13
9-13
9-13
9-10
9-10
9-7
9-6
9-6
9-6
9-5
9-4
9-3
9-1
9-1
9-1
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