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Virttual PBX, IP PBX , PABX, IP PABX

Requirements for basic residential or business service:

Internet connection; DSL, Cable or wireless. A router (integrated in some ATA device models, and modems), and an available Ethernet port and IP address. If you can not meet these requirements, you may need to a purchase a hardware router to translate one Public IP address to multiple Private IP addresses behind a NAT. You do not need a fixed IP address, it can be a dynamic IP address from your ISP. If your neither yor ATA device nor modem has an integrated router, it is probable that you will need an external router, so you may connect both a computer and IP telephone device.
 

SIP connection diagram with router


Connection diagram with router
Cisco ATA 186 shown, other models are similar

IMPORTANT NOTE! in some regions or countries, Mexico in particular, cable internt providers are  putting all users behind their NAT/Router. If your cable provider does not give you a public (may be either dynamic or fixed) IP address, you  should not use a router, nor a modem with an integrated router, as this represents two layers of NAT/routers and is nearly impossible for most SIP systems to surmount reliably.  Many of these same providers are now offering wireless modems which implement built in NAT/Router thus the user is behind two NAT/Routers  whern connecting to the modem directly. We therefore recommend against the use of such modems with integrated NAT/Routers, such as the wireless units. Many such providers WILL allow you multiple private IP addresses with no addtional fee, so you may use an ethernet switch in place of the router in the image above, or in the case of many modems, connect your computer via USB, and your ATA device via ethernet. If you aready know you are behind a double NAT, there is nothing we can do!


IMPORTANT NOTE! Some DSLand Cable modems incorporate integrated NAT/routers which means if you have this type of modem the same potential problems exist, as in the note above.

How Do I configure My Device?
First off, we do not use an outbound proxy. Our NAT configurations are entirely based on STUN and this works very well for us. Check the list below for a link to your device.
The following External links may prove useful in diagnosing the ability of your current connection's VOIP readyness, or to diagnose an existing connection.

supernettel device configurations