VoIP at the Charles University

IP telephony (Voice over internet protocol, VoIP) is an application operated on packet-switched data IP networks. In comparison with telecommunication structure based on linking channels, it is more efficient and progressive. It uses modern methods of voice coding and up-to-date communication protocols.

VoIP enables telephone calls between various institutions and departments and calls to other institutions using a computer network (i.e., without the need to pay telephone fees to telephone operators). A phone call can be made even without a personal computer – just through a regular telephone.


Services linking telephone exchanges of faculties and their parts using protocol H323 (voice gates) enable users to make free calls between all telephone exchanges participating in this virtual telephone network.


One of the telephone exchanges linked to the virtual network operates a virtual telephone exchange for employees of the Rectorate of the Charles University and the Computer Science Centre.

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Last change: March 11, 2015 11:32 
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Computer Science Centre

Charles University

Ovocný trh 560/5

116 36 Prague 1

Czech Republic


Phone: +420 224 491 647

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