1. Introduction
   1.1 Purpose
   1.2 Scope
   1.3 Target Audience
   1.4 Background
   1.5 Assumptions
   1.6 Reason for Reissue
   1.7 Requirements Terminology
   1.8 Requirement Labeling Conventions
       1.8.1 Numbering of Requirement and Related Objects
       1.8.2 Requirement, Conditional Requirement, and Objective
             Object Identification
2. User Perspective
3. PSAP Perspective
4. E9-1-1 Network Provider Perspective
   4.1 E9-1-1 Network Architecture
   4.2 E9-1-1 Information Exchange
   4.3 Interworking
5. Requirements
   5.1 Switch Requirements
       5.1.1 Processing of Emergency Calls
             5.1.1.1 Wireline End Office Requirements
             5.1.1.2 Access Tandem Switch Requirements
             5.1.1.3 E9-1-1 Tandem Switch Requirements
             5.1.1.4 Callback Calls
             5.1.1.5 Operator-Assisted Emergency Calls
             5.1.1.6 Mapping of SS7 Parameters to PSAP Interface
       5.1.2 Backup MF Trunking
       5.1.3 Operations
             5.1.3.1 Data Administration
             5.1.3.2 Traffic Measurements
             5.1.3.3 Network Traffic Management
             5.1.3.4 Maintenance
   5.2 Signaling Requirements
       5.2.1 IAM Encoding - End Office to E9-1-1 Tandem Call Setup
             5.2.1.1 IAMs Originating in Wireline Networks - Call
                     Routed Over Shared SS7-Supported Trunks
             5.2.1.2 IAMs Originating in Wireline Networks - Call
                     Routed Over Dedicated SS7-Supported Trunks
             5.2.1.3 IAMs Originating in Wireless Networks - Call
                     Routed Over Shared SS7-Supported Trunks
             5.2.1.4 IAMs Originating in Wireless Networks - Call
                     Routed Over Dedicated SS7-Supported Trunks
       5.2.2 IAM Encoding for E9-1-1 Tandem to E9-1-1 Tandem Signaling
             5.2.2.1 Emergency Call Which Originated in a Wireline
                     Network
             5.2.2.2 Direct Call Which Originated in a Wireline
                     Network
             5.2.2.3 Emergency Call Which Originated in a Wireless
                     Network
             5.2.2.4 Direct Call Which Originated in a Wireless
                     Network
6. Network Impacts
   6.1 Reliability
References
Glossary
Requirement-Object Index