Manuals / ZyXEL Communications / Communications / Telephone

ZyXEL Communications P2000W manual NAT and SIP, Sip Alg, Fake WAN Address on SIP and RTP

Models: P2000W

1 131

Download 131 pages 38.99 Kb

Page 88

P-2000W_V2 User’s Guide

Figure 25 Symmetric NAT

12.12 NAT and SIP

Some NAT routers are not SIP-friendly and will stop your voice sessions.

The Prestige must register its public IP address with a SIP register server. If there is a NAT router between the Prestige and the SIP register server, the Prestige probably has a private IP address. The Prestige lists its IP address in the SIP message that it sends to the SIP register server. NAT does not translate this IP address in the SIP message. The SIP register server gets the Prestige’s IP address from inside the SIP message and maps it to your SIP identity. If the Prestige has a private IP address listed in the SIP message, the SIP server cannot map it to your SIP identity.

A SIP ALG (Application Layer Gateway), the fake WAN address on SIP and RTP, STUN, or outbound proxy features allow the Prestige to use its public IP address in the SIP messages.

12.12.1 SIP ALG

Some NAT routers may include a SIP Application Layer Gateway (ALG). A SIP ALG allows SIP calls to pass through NAT by examining and translating IP addresses embedded in the data stream. When the Prestige registers with the SIP register server, the SIP ALG translates the Prestige’s private IP address inside the SIP data stream to a public IP address. You do not need to use STUN or an outbound proxy if your Prestige is behind a SIP ALG.

12.12.2 Fake WAN Address on SIP and RTP

If you know the NAT router’s public IP address and SIP port number, you can use the fake WAN address on SIP and RTP feature to manually configure the Prestige to use a them in the SIP messages. This eliminates the need for STUN or a SIP ALG.

You must also configure the NAT router to forward traffic with the SIP port number to the Prestige.

88	Chapter 12 User Web Configurator Screens
VoIPon www.voipon.co.uk	sales@voipon.co.uk Tel: +44 (0)1245 808195 Fax: +44 (0)1245 600030

Image 88

ZyXEL Communications P2000W manual NAT and SIP, Sip Alg, Fake WAN Address on SIP and RTP

Contents

2000WV2 Page Copyright DisclaimerTrademarks 2000WV2 User’s GuideCertifications Sales@voipon.co.uk Tel +44 01245 Fax +44 012452000WV2 User’s Guide Safety Warnings Safety WarningsZyXEL Limited Warranty Customer Support Customer SupportUnited Kingdom Page Table of Contents Chapter Network Settings 10.1 Appendix a Appendix C Page List of Figures List of Figures Prestige as a PPPoE ClientList of Tables List of Tables Preface About Your PrestigeRelated Documentation Syntax ConventionsGraphics Icons Key PrefaceFeatures QoS Quality of ServiceGetting To Know Your Prestige Dynamic Jitter BufferApplications Place a Call via SIP Proxy Server SIP Call ServerAd-Hoc Wireless Intercom Direct IP to IP CallingGetting to Know the Prestige Hardware Prestige Hardware Descriptions2000WV2 User’s Guide Prestige Hardware Descriptions Page Using the LCD Screen Menus LCD Main ScreenUsing the LCD Screen Menus Navigating the LCD Screen MenusText Input 2000WV2 User’s Guide LCD Main ScreenPress the OK key when you are done Page Wireless LAN Setup Menus Wireless LAN Setup Menus Tel +44 01245 808195 Fax +44 01245Site Survey Select Site SurveyNetwork Mode Select Wireless in the first menu screen use the up or downWireless LAN Setup Menus SsidSelect Network Mode ChannelRate WEP EncryptionAuthentication Type Select Key SelectProfiles Create Page Fixed IP Network SettingsSelect IP Address Dhcp Network SettingsSelect Subnet Mask PPPoE Select PPPoE NameClear the PPPoE password and enter your’s Select PPPoE PwdRegistrar Server SIP SettingsSelect Registrar Select Registrar IP Outbound Proxy Server SIP SettingsSelect Outbound Proxy Proxy Server Select Proxy ServerUser Account Select User Account Select Phone NumberUsername Page Phonebook Calling MethodsAdding a Phonebook Entry Select Phonebook in the first menuEditing Phonebook Entries PhonebookErasing Phonebook Entries Speed Dial Phonebook Entries Select Speed DialCall History Missed CallsReceived Calls Call HistoryDialed Calls Erasing CallsSelect Erase Calls Setting the Ring Melody Miscellaneous SettingsMiscellaneous Settings Tel +44 01245 808195 Fax +44 01245 Setting the Vibration Mode Adjusting the Ring VolumeSelect Ringer Volume Miscellaneous SettingsSetting the Time Setting the DateSelect Edit Time Select Edit DateSetting the Banner Setting the Key LockSelect Settings in the first menu screen Press the Left key to save your settingSetting the Don’t Disturb Select Don’t DisturbPage Information Menus Displaying InformationSelect Firmware Ver Information MenusUsing the Phonebook to Dial a Telephone Number Using Speed Dial to Dial a Telephone NumberPrestige Usage Dialing a Telephone NumberChanging the Volume Answering a CallRejecting a Call Prestige UsageUsing the Web Configurator Screens Introduction to the Web ConfiguratorLogin AccountsNavigating the Prestige Web Configurator Using the Web Configurator ScreensWeb Configurator User Screens Summary Web Configurator Administrator Screens SummaryPage User Web Configurator Screens Device InformationIP Address Assignment Private IP Address RangesIP Address and Subnet Mask User Web Configurator ScreensMAC Address Network Configuration Static DNS ServerCancel Network Configuration DhcpApply Dhcp Network Configuration PPPoE PPPoE Network ConfigurationVoIP Introduction 12.9.1 SIPSIP Identities PPPoESIP Call Progression SIP Client ServerSIP Call Progression InviteSIP Proxy Server SIP Configuration 12.9.1.4 RTP12.11 NAT SIP ProxyNAT Example NAT TypesFull Cone NAT NAT TypesRestricted Cone NAT Full Cone NAT ExamplePort Restricted Cone NAT Symmetric NATSIP ALG NAT and SIPFake WAN Address on SIP and RTP Stun NAT Traversal ConfigurationOutbound Proxy NAT Traversal Configuration ALGPhonebook Configuration PhonebookCalling Methods StunEdit DeleteClear Wireless Settings Wireless IntroductionWEP Encryption Ssid WEPSystem 12.19 S/W UpdateSubmit W Update Zip files before you can upload themAdministrator Web Configurator Screens SIP Proxy Configuration Administrator Web Configurator ScreensSIP Configuration SIP URIVoice Coding 2000WV2 User’s Guide SIP Configuration13.3.1 G.711 Phone Setting Pstn Call Setup Signaling13.3.2 G.729 Same codec as the Prestige Quality of Service System Settings13.8 ToS Introduction to DiffServTroubleshooting Problems Starting Up the PrestigeProblems Using the Keypad Troubleshooting the Start-Up of Your PrestigeProblems Accessing the Prestige Troubleshooting Accessing the PrestigeError Message Troubleshooting Restoring the Factory Default SettingsError Message Troubleshooting DhcpPage Hardware Specifications Specification TablesMIC HTTP, TFTP, TCP, UDP, DNS, ARP, Icmp 2000WV2 User’s Guide Firmware FeaturesEssid IP Classes IP AddressingClasses of IP Addresses Subnet Masks SubnettingAllowed IP Address Range By Class Natural MasksAlternative Subnet Mask Notation Example Two SubnetsTwo Subnets Example Subnet Example Four Subnets Eight Subnets Example Eight SubnetsClass C Subnet Planning Subnetting With Class a and Class B Networks Class B Subnet PlanningPage Benefits of PPPoE PPPoE in ActionTraditional Dial-up Scenario How PPPoE Works Prestige as a PPPoE ClientWireless LAN Topologies Ad-hoc Wireless LAN ConfigurationESS Roaming Infrastructure WlanRequirements for Roaming Roaming Example2000WV2 User’s Guide Page Index Numerics711 24, 100 729 24, 101 IP-PBXPCM 100 130 Index Sales@voipon.co.uk Tel +44 01245 Fax +44 01245 Wlan