Cisco SPA962-NA Administration Guide - Page 3
Contents, Using 900 Series Phones with a Firewall or Router - background
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CONTENTS Preface xi Document Audience xi Linksys 900 Series IP Telephones xi How This Document is Organized xii Document Conventions xii Related Documentation xiii Technical Support xiii 1 C H A P T E R Introducing Linksys 900 Series IP Phones 1-1 Overview 1-1 SPA900 Series Features 1-2 SPA901 Features 1-4 SPA92x, SPA94x, and SPA962 Features 1-4 Ensuring Voice Quality 1-4 Feature Descriptions 1-6 SIP Proxy Redundancy 1-6 Supported Codecs 1-6 Other Features 1-7 Technology Background 1-10 Session Initiation Protocol 1-10 Using 900 Series Phones with a Firewall or Router 1-11 Network Address Translation 1-11 NAT Overview 1-12 NAT Types 1-12 Simple Traversal of UDP Through NAT 1-13 SIP-NAT Interoperation 1-13 Where to Go From Here 1-14 2 C H A P T E R Getting Started 2-1 Linksys 900 Series IP Phones 2-1 Caring for Your Hardware 2-2 SPA901 2-2 Document Version 3.0 Linksys 900 Series IP Phone Administrator Guide iii