| Preface | p. ix |
| An Overview of the Public Network | p. 1 |
| Understanding the Scope of the Task | p. 1 |
| General Topology of the Switched Network | p. 1 |
| Historical Overview of the Switching Hierarchy | p. 2 |
| Overview of the Current Switching Hierarchy | p. 4 |
| Private Line Circuit Topology | p. 6 |
| The ATandT Toll Office | p. 10 |
| The Bell Regional Toll Office | p. 11 |
| Central Office Cross-Connection Methods | p. 12 |
| Designing the Network to Survive | p. 15 |
| The Typical Network | p. 15 |
| Going T1--The "Whys" | p. 16 |
| Reduced Cost | p. 19 |
| Improved Network Management | p. 19 |
| Preparation for New Technologies | p. 20 |
| Greater Network Survivability | p. 20 |
| Rules for Optimizing the Design | p. 20 |
| Computer Disaster Recovery | p. 23 |
| An Overview | p. 23 |
| Computer Disaster Recovery--A Brief History | p. 24 |
| Recent Disaster Declarations | p. 25 |
| The Hinsdale Central Office Disaster | p. 25 |
| The Brunswick Central Office Disaster | p. 26 |
| Flooding in Chicago | p. 27 |
| The 1989 San Francisco Earthquake | p. 27 |
| The January 1990 ATandT Network Failure | p. 27 |
| Other References on Disaster Recovery | p. 31 |
| Telecommunication Disaster Recovery | p. 33 |
| Telecommunication: The Weakest Link in the Recovery Plan | p. 33 |
| Overview of Communication Recovery Options | p. 33 |
| Dial Backup | p. 34 |
| Reserved T1 with Central Office Multiplexing | p. 35 |
| Advantages of M24-Type Multiplexing | p. 35 |
| Drawbacks to "Reserved" T1 Facilities | p. 37 |
| Switched 56 kb Service | p. 37 |
| The Telecommunication Recovery Center | p. 39 |
| The "Broom Closet" | p. 40 |
| Equipment Collocation with Common Carriers | p. 42 |
| Analysis of Carriers for Equipment Collocation | p. 42 |
| Backup for Telephone Central Offices | p. 45 |
| Using Carrier POPs for Central Office Diversity | p. 45 |
| Disaster in the Bell Access Tandem or ATandT Toll Center | p. 47 |
| Consequences of a Toll Center Disaster | p. 48 |
| Thinking the Unthinkable | p. 49 |
| Options in a Regional Central Office Disaster | p. 50 |
| Use of Microwave for Recovery | p. 51 |
| Use of Satellite for Recovery | p. 54 |
| What Is a Teleport? | p. 56 |
| The Dallas-Fort Worth Teleport | p. 57 |
| Use of Cellular for Recovery | p. 61 |
| Assessing Vulnerability in the Local Serving Office | p. 63 |
| Starting the Assessment Process | p. 63 |
| Utilizing State Public Service Commission Records | p. 65 |
| Assessing Central Office Physical Security | p. 69 |
| Contingency Planning Within the Bell Operating Companies | p. 75 |
| "Post-Hinsdale" Recommendations | p. 75 |
| Redundancy in High Volume Corporate Networks | p. 77 |
| Common Communication Disasters | p. 81 |
| Cable Cuts--How to Protect Against "Backhoe Fade" | p. 81 |
| Assessing Communication Rights-of-Way | p. 81 |
| Other Points of Network Vulnerability | p. 84 |
| Engineering Techniques for the Bell Operating Companies | p. 87 |
| SafetyNet Service Assurance Conquers Disaster | p. 87 |
| Robust Interoffice Transport | p. 88 |
| Route Diversity Ring | p. 89 |
| Dual-Fed Ring | p. 90 |
| The Reconfigurable Ring | p. 91 |
| Robust Interexchange Access | p. 93 |
| Robust Access for the End-Customer | p. 93 |
| Facility Protection Services | p. 95 |
| Rapid Deployment Service | p. 95 |
| Today's Trials ... Tomorrow's Developments | p. 96 |
| Protecting the Corporation--Everyone's Responsibility | p. 99 |
| Telecommunication Disasters: Liability Issues | p. 99 |
| Liability of Private Firms | p. 100 |
| Liability of Public Entities | p. 102 |
| Liability of the Telecommunication Carrier | p. 103 |
| Limitations of Liability, Insurance, and Indemnification | p. 105 |
| What Should You Do? | p. 105 |
| Epilogue | p. 107 |
| Glossary | p. 109 |
| The Author | p. 113 |
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