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ZyXEL Communications 2002 Series 5.3 STUN, 5.2.3.4 SIP Register Server, 5.2.4RTP, 5.3.1 NAT

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Prestige 2002 Series User’s Guide

Figure 14 SIP Redirect Server

5.2.3.4 SIP Register Server

ASIP register server maintains a database of SIP identity-to-IP address (or domain name) mapping. The register server checks your user name and password when you register.

5.2.4RTP

When you make a VoIP call using SIP, the RTP (Real time Transport Protocol) is used to handle voice data transfer. See RFC 1889 for details on RTP.

5.3 STUN

STUN (Simple Traversal of User Datagram Protocol (UDP) through Network Address Translators) allows the Prestige to find the presence and types of NAT routers and/or firewalls between it and the public Internet. STUN also allows the Prestige to find the public IP address that NAT assigned, so the Prestige can embed it in the SIP data stream. See RFC 3489 for details on STUN.

5.3.1 NAT

NAT routers are commonly used to translate private (or internal) IP addresses in packet headers to public (or external) IP addresses and vice versa. NAT A NAT router maps a private IP address and port pair to a public IP address and port, and whenever the NAT router receives a packet with that public IP address and port, it knows how to reroute the packet back to the private IP address and port. The figures in this section use lower-case letters (like a.b.c.d for example) to represent public IP addresses. In the following figure, NAT maps the same IP address to both A and B, but uses separate ports.

42	Chapter 5 Introduction to VoIP

Contents

User’s Guide Page Copyright Disclaimer Trademarks Federal Communications Commission (FCC) Interference Statement Notice Certifications ZyXEL Limited Warranty Note Safety Warnings Customer Support Table of Contents Introduction to VoIP Phone Phone Book Maintenance Troubleshooting Appendix A Hardware Specifications Appendix B Appendix C List of Figures Page List of Tables Page Preface About This User's Guide Related Documentation User Guide Feedback Syntax Conventions Graphics Icons Key Introducing the Prestige 1.1 Prestige 2002 VoIP Analog Telephone Adaptor Overview 1.2Prestige 2002L VoIP Analog Telephone Adaptor with Lifeline 1.3 Features 10/100Mbps Auto-negotiatingFast Ethernet Interfaces PSTN Lifeline REN Dynamic Jitter Buffer Standards Compliance Multiple SIP Accounts 1.4 Applications 1.4.2 Make Calls via IP-PBX Page Page Introducing the Web Configurator 2.1 Web Configurator Overview 2.2Accessing the Prestige Web Configurator Apply Ignore MAIN MENU 2.3 Resetting the Prestige 2.4Navigating the Prestige Web Configurator Page 2.5 Common Screen Command Buttons Page System Screens 3.1 System Overview 3.2 General Setup 3.3 General Setup Configuration 3.4 Configuring Password 3.5 Pre-definedNTP Time Servers List 3.6 Configuring Time Setting Page Page Ethernet Screens 4.1 ETHERNET Overview 4.2 Configuring Ethernet Figure 10 ETHERNET Table 7 ETHERNET 4.3 Configuring the Ethernet Management Port Introduction to VoIP 5.1 Introduction to VoIP 5.2 Introduction to SIP 5.2.1.1 SIP Number 5.2.1.2 SIP Service Domain 5.2.3.1 SIP User Agent Server 5.2.3.2 SIP Proxy Server 5.2.3.3 SIP Redirect Server 5.2.3.4 SIP Register Server 5.3 STUN 5.3.2.1 Full Cone NAT 5.3.2.2 Restricted Cone NAT 5.3.2.3 Port Restricted Cone NAT 5.3.2.4 Symmetric NAT 5.4 SIP ALG 5.5 Pulse Code Modulation 5.6 Voice Coding 5.7 PSTN Call Setup Signaling VoIP Screens 6.1 VoIP Introduction 6.2 VoIP Configuration 6.3 Advanced VoIP Settings Configuration Page Page 6.4 Quality of Service (QoS) 6.4.2.1 DSCP and Per-HopBehavior 6.5 QoS Configuration Phone 7.1 Phone Introduction 7.2 Phone Port Configuration Figure 24 Phone Port Phone Book 8.1 Phone Book Introduction 8.1.1.1 Peer-to-PeerCalls 8.2 Speed Dial Configuration Figure 25 Phone Book 8.3 Lifeline Configuration (Prestige 2002L) Page Logs 9.1 Viewing Logs 9.1.1 Log Message Descriptions Table 19 SIP Logs Table 20 RTP Logs Page Maintenance 10.1 Maintenance Overview 10.2 Status Screen 10.3 F/W Upload Screen Firmware Upload in Process 10.4 Configuration Screen 10.4.1Backup Configuration Configuration Upload Error 10.4.3 Back to Factory Defaults Reset 10.5 Restart Screen Page Troubleshooting 11.1 Problems Starting Up the Prestige 11.2 Problems with the LAN or PC LED 11.3 Problems with the LAN Interface 11.4 Problems with Internet Access 11.5 Problems with the Password 11.6 Problems with the Web Configurator 11.7 Problems with Telephone or Telephone Port 11.8 Problems with Voice Service Appendix A Hardware Specifications Ethernet Port Specifications Prestige 2002 Power Adaptor Specifications Prestige 2002L Power Adaptor Specifications Appendix B Setting up Your Computer’s IP Address Windows 95/98/Me Installing Components Add Adapter Protocol Microsoft Configuring Obtain an IP address automatically Specify an IP address Subnet Mask DNS Windows 2000/NT/XP Network Connections Network and Dial-up Connections 3Right-click Local Area Connection and then click Properties Internet Protocol (TCP/IP) General Use the following IP Address IP address Subnet mask Default gateway Advanced Use the following DNS server addresses Preferred DNS server Alternate DNS server 8Click OK to close the Internet Protocol (TCP/IP) Properties window 9Click OK to close the Local Area Connection Properties window Macintosh OS 8/9 Macintosh OS Automatic Location •Select Built-inEthernet from the Show list Using DHCP Apply Now Appendix C IP Subnetting IP Addressing IP Classes Subnet Masks Subnetting Example: Two Subnets Page Example: Four Subnets Example Eight Subnets Subnetting With Class A and Class B Networks Page Appendix D PPPoE PPPoE in Action Benefits of PPPoE Traditional Dial-upScenario How PPPoE Works Prestige as a PPPoE Client Index