VOIP (Voice Over Internet Protocol) phones are phones which use IP protocol directly from the Phone itself to an ethernet port.

Each phone has a unique IP address in the same way as your computer and router which is used for communicating over the Internet or local network (LAN). You can connect a standard analogue phone via an adapter (see HERE for details) to make calls over the internet, but the phone itself is NOT a VOIP phone.

So, the Beocom 2400 is NOT a VOIP phone and B&O have never made a VOIP phone.

Cisco Systems is the worlds leading manufacturer of VOIP phones see HERE for details

  this may be no use to you if you havent got BT which you probably havent.

ArgyleMoss,

I think we have a definition difference here.

With your BT adapter you can use your standard analogue or DECT phone without modification to make and receive calls over the Internet. There are many services such as this with or without an adapter. When you use services such as

Thanks Keith,

so the difference with Benoit's beocom 1400 being compatible is due to its battery supplying power vs the beocom 2400 which has no power supply ?