Linksys SPA921 Cisco Small Business IP Phone SPA9X1 Administration Guide - Page 2
Using Linksys IP Phones with a Firewall or Router, SPA92x, and SPA962 Hardware Features
UPC - 745883570799
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1 C H A P T E R 2 C H A P T E R Document Audience i-ix Related Documentation i-x Technical Support i-x Contents CONTENTS Introducing Linksys IP Phones 1-1 Overview 1-1 Linksys IP Phone Features 1-2 SPA901 Features 1-3 SPA92x, SPA94x, SPA962 1-4 Ensuring Voice Quality 1-4 Feature Descriptions 1-5 SIP Proxy Redundancy 1-5 Supported Codecs 1-5 Technology Background 1-8 Session Initiation Protocol 1-9 Using Linksys IP Phones with a Firewall or Router 1-9 Network Address Translation 1-10 NAT Overview 1-10 NAT Types 1-11 Simple Traversal of UDP Through NAT (STUN) 1-11 SIP-NAT Interoperation 1-12 Getting Started 2-1 Linksys 900 Series IP Phones 2-1 Caring for Your Hardware 2-2 Back Panel 2-3 SPA92x, SPA94x, and SPA962 Hardware Features 2-3 Front Panel 2-4 SPA932 2-5 Front Panel 2-7 Back Panel 2-7 Front Panel 2-9 Back Panel 2-9 SPA9000 IP PBX System 2-9 Establishing Connectivity 2-9 Bandwidth Requirements1 2-10 Installing the SPA900 Series IP Phone 2-10 Firmware Version 5.1 Linksys IP Phone Administrator Guide i