The SIP protocol is commonly used for IP telephone communications. Unfortunately it’s notorious for having issues with NAT traversal. Even some major vendors can’t seem to get it right. [Stephen] had ...

For all the technology behind Voice over IP (VoIP), you'd expect that it would work on every network, but this unfortunately isn't the case. Network Address Translation (NAT) is a common practice used ...

Also called "port mapping," port forwarding is directing traffic from the outside world to the appropriate server inside a local TCP/IP network. Internet services are identified by a standard port ...

I just converted my Novell NetWare network over to Windows 2000 Server this week. All is going well except for a couple of printers.<BR><BR>I have five Lexmark Optra Rt+ printers with Lexmark MarkNet ...

We see that your registered now, we made a test call to your number and there was no response to our invite, until your device re-registered, There is re-registration ...