 traffic that the end user is willing to pay for. 2.6.2 THE GENERATING SIDE All traffic is in some way generated by the human end user. Let us take a brief look at some of the services where the end user plays an active role in traffic generation. The generation of voice traffic is well known. For a population the volume can be calculated in terms of Erlang per area unit. Video For the business corporate sector video conference and video telephony are listed. Video- conferencing can obviously often replace travelling. Except for fixed devices mobile 3G terminals will be able to participate. Video clips are supposed to become a very successful application, indeed. Messaging Messaging has developed to a really important service area with the human being as the main traffic generator. Since it traditionally has been a slow service it fits quite well to the human reception ability. Photo generation is already possible by means of integrating a camera into the mobile terminal or connecting a camera to the terminal. A considerable generation of traffic, for example during vacations, is expected. Christmas cards are another example. Instead of integrating camera and mobile terminal, the mobile terminal can serve as a transmitter End-User Needs and Demands connected to ordinary digital cameras. In this case bandwidth and/or compression are vital. Pictures and clips can be sent as e-mail attachments as well. The global collection of private photo albums represents one of the largest information stores at present. When digitized, the growing treasure of photos can of course be easily interchanged electronically, constituting a significant potential traffic generator. The need to send photos might be compared with 'remote viewing of photo albums'. According to an investigation done by Ericsson Consumer Lab two out of three pioneers want a camera in the mobile terminal/device. 2.7 THE FUTURE MOST COMMON END USER: A MACHINE In 1980, the old mainframe world had 100 users per mainframe. Around 2000, there is roughly one PC and 