Circuit-switched telephony is slowly, but surely, being replaced by IP telephony. This is happening at service providers as well as internally within organisations.
Initially, this will not lead to any change noticeable by the end-user. We will still be able to call each other, and use services such as call forwarding. Technologically, however, there is a host of aspects the we need to consider and things we just need to know. Among other things, we need to learn to tell the difference between signalling and media, and be able to take quality requirements into account.
The benefits of IP telephony are huge, though. We are not bound to any particular codecs, conferences will be much simpler, and we will use the same technology for telephony and data.
Most people in the world of commmunications come from either datacom or telecom. At IP-Solutions, we were born and raised in the world of the Internet, and this can be argued is our home field. We have, however, worked for so many years with the combination of telephony and datacom that we are almost beginning to forget our origin.