Quadro Quadro2x2 Installation Manual
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Contents
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Quadro6L/4L/2x2 Manual I: Installation Guide Appendix: Configuring NAT TraversalQuadro6L/4L/2x2; (SW Version 5.3.x and higher) 47Appendix: Configuring NAT TraversalNAT or Network Address Translation is a common feature used to expand the use of con-nected PCs and other networked devices without having to use multiple global Internetpublic IP addresses. Most ISP’s will assign one public IP address to each customer that isconnected to the Internet. The customer can use a router to provide NAT capability andcreate a private network of PCs and other devices not visible from the Internet. Thismethod offers security and also eliminates the need to assign global Internet public IP ad-dresses to each device on the LAN.The Quadro initiates and receives SIP calls from the Internet (or the network connected tothe WAN port). To receive SIP calls, the Quadro must be able to receive packets from theSIP server or any other device that is trying to make an incoming call. If the Quadro isplaced behind a router with NAT, like most basic routers on the market today, the Quadrowill not be able to receive calls. To resolve this issue, either STUN must be enabled on theQuadro or SIP NAT traversal must be set up in the router and in the Quadro to route the in-coming calls properly.Please Note: NAT traversal only works with Internet connections that have static IP ad-dresses. Verify from your provider that this is the case for your Internet connection. SomeISPs provide dynamic IP addresses that may change from time to time, and are not appro-priate for SIP NAT traversal.Please Note: If you have more than one router in series between the Quadro and the In-ternet, the same port forwarding setup must be configured on each router.NAT Traversal Setup• Install the Quadro behind the router. If the Quadro is configured with its factory defaultsettings, it is already configured for DHCP and will obtain an IP address automaticallyfrom the router.• Connect a PC to the Quadro LAN port and power it up.• Verify the Quadro can connect to the Internet by opening a browser window andbrowsing to a familiar WEB site. If the Quadro cannot reach the Internet, verify theLAN/WAN LEDs and the cabling. Verify the Quadro is set up for DHCP on the WANand that the router has the DHCP server enabled for the devices behind it.• Find the address of the router and log into the router. Refer to the router’s user manualon how to open the router configuration.• Set up port forwarding on the router to forward UDP ports 5060, 6000-6099 to the IPaddress assigned to the Quadro. You can see the IP address of the Quadro in theSystem menu under Status, submenu Network Status. The IP address will be listed asthe WAN IP address. Your router also may indicate the IP address assigned to theQuadro.• Find out the public Internet address (WAN IP address) of the router. To do so, open abrowser and go to www.whatismyip.com. The site will return your public Internet IPaddress. Record this IP address.• From the Telephony menu of the Quadro Management go to the NAT Traversal Set-tings page, go to General Settings and set the enable NAT Traversal for SIP radiobuttons selection to Force. Save the selection. |
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