Issue 3 June 2000
xiii
Contents
Ringing Generator Units (RGU) 4-11
AUA421 Channel and Drop Test Unit (CDTU) 4-12
LEDs 4-12
Power Minor Alarm 4-13
Power Distribution 4-14
5 Transmission and Synchronization
5-1
■
Overview 5-1
■
Transmission Interfaces 5-1
DS1 Transmission Interface 5-1
OC-1/OC-3/OC-12 Transmission Interface 5-1
T1 Transmission Interface 5-2
■
Transmission and Architecture 5-2
Wideband Shelf Interfaces and Multiplexing 5-2
Wideband Shelf Protection Architectures 5-4
Narrowband Shelf Interfaces and Multiplexing 5-4
Wideband and Narrowband Shelf Integration 5-6
■
Synchronization 5-7
Manual Timing Pack Switch 5-7
Subnetwork Configurations 5-7
Free Running/Line Timing 5-7
External Timing/Line Timing Configuration 5-9
Line Timing/Line Timing Configuration 5-11
Timing Distribution 5-12
■
Synchronization Messaging 5-14
Applications 5-14
Automatic Synchronization Reconfiguration 5-14
Synchronization Provisioning Integrity 5-15
Feature Details and Options 5-15
Examples 5-17
Synchronization Reconfiguration in an Access Ring 5-17
5-17
5-17
5-15
5-15
5-14
5-14
5-14
5-12
5-11
5-9
5-7
5-7
5-7
5-7
5-6
5-4
5-4
5-2
5-2
5-2
5-1
5-1
5-1
5-1
5-1
4-14
4-13
4-12
4-12
4-11
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