AT&T DS1/DMi/ISDN-PRI manual Digital Loss Plan, Synchronization of Digital Facilities

CONTENTS v

System 85 Traditional Modules

Generic 1 and Generic 2 Universal Modules

4. THE DIGITAL LOSS PLAN

LOSS-PLAN IMPLEMENTATION AND PROVISIONING

Generic 2

Generic 1

PORT-TO-PORT LOSS VALUES

DS1/DMI/ISDN-PRI PORT LOSSES

TERMINATING A DS1 AT A CHANNEL BANK

Tie Trunk Ports

CO DID Trunk Ports

OPS Ports

5. SYNCHRONIZATION OF DIGITAL FACILITIES

THE NEED FOR SYNCHRONIZATION

SYNCHRONIZATION HIERARCHY

System 85 and Generic 2 Synchronization Architecture

System 85 and Generic 2 Synchronization Software Operation

CHANGES TO THE SCS SOFTWARE MADE AVAILABLE VIA SOFTWARE PATCHES

System 75 and Generic 1 Synchronization Architecture

System 75 and Generic 1 Synchronization Software Operation

The External Synchronization Clock

NETWORK SYNCHRONIZATION AND ENGINEERING

Selecting a Timing Source for the Switch

Internal Reference Selection Rules

External-Reference Selection Rules

AVAILABILITY OF SYNCHRONIZATION SOURCES

CONCLUSIONS ON SYNCHRONIZATION

USE OF GENERIC 2 AS A SYSTEM CLOCK REFERENCE

ISDN-PRI Trunk Facilities (ANN35 or TN767 with TN755)

Line-Only Mode DS1/DMI-BOS (ANN11_ or TN767)

3-9

3-9

4-1

4-2

4-2

4-3

4-4

4-6

4-6

4-6

4-6

4-7

5-1

5-1

5-3

5-7

5-9

5-11

5-11

5-12

5-14

5-18

5-18

5-19

5-27

5-28

5-29

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