XML Based Service Provisioning in Converged Voice and Data Networks

Diploma Thesis from the year 2001 in the subject Electrotechnology grade: 17 University of Ulm language: English abstract: In today's world there are mainly two types of communication networks: circuitswitched networks and packet-switched networks. The current telephone networks are mostly based on the circuit-switched networks whereas the Internet is mainly based on the packetswitched networks which are also called IP networks. However there is a strong tendency to combine both of these networks which points to the direction that the IP networks are going to replace services provided by current telephone networks. This would eventually mean that IP networks might replace the telephone networks in the future.Following are some reasons why IP networks seem to replace the circuit-switchednetworks:· First of all the IP networks provide cheaper communication. Considering thatthe Internet access is nearly free the cost advantage of IP networks gets clearer[25].· Secondly IP networks provide the ability of integrating the data and voiceapplications and even some other applications like video-conferencingintegrated voice mail e-mail and the like [26].· Another important reason is that IP networks allow open implementation ofend systems. With a reasonable programming knowledge everybody couldimplement an end system for IP networks. In the classical telephony end userscannot implement any end system but have to use whatever provided by theservice providers. [27]