Using the VoIP












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            To make a phone call through a computer network, users need to dial a prefix. It is simila

            outside the building, except that instead of a ‘0’, users dial a different number. Unfortu
            prefix is different for each locality (it depends on the local telephone exchange):
            Before dialling the intended phone number, instead of ‘0’ users wishing to call outside a 

            • 98 in the buildings of Carolinum and Celetná 13 in Prague (i.e., when calling from 224 4
            • 94 in the buildings of the Faculty of Education (i.e., calling from 221 900 xxx)
            • 8 in the building of the Faculty of Philosophy – Nám. Jana Palacha Square 2, i.e., when 

              619 xxx)
            • 8 in the buildings of the Jinonice Campus (i.e., calling from 251 080 xxx)

            • 87 in the building of Faculty of Physical Education and Sport (i.e., when calling from 2
            • 55 in the building of the Faculty of Pharmacy in Hradec Králové (i.e., when calling from
            Continue by dialling the regular nine-digit number.

            At the Hydrobiological Station Velký Pálenec, there is no prefix. Users dial directly the 
            digit number.
            Rectorate and other parts of the Charles university residing in the Celetná - Ovocný trh c

            phone calls to other institutions participating in this project are after dialling (throug
            automatically redirected to the IP network (that is, without phone fees to telephone opera
            Example:

            If you wish to call from the Rectorate of the Charles University to the Masaryk University
            dial the following sequence of numbers (in order to make the explanation clearer, we have 
            several lines and attached comments):
                                                                           
            98                 To enter the IP telephony network           
               541512          Masaryk University in Brno                  
                       xyz     Extension of the person you are calling     


            Another example – calling from the Faculty of Pharmacy in Hradec Králové to the Rectorate 
            University in Prague: 55 224 491 xyz







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            * Contact and support
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            In case you are experiencing problems completing a phone call in the manner described abov

            happen), use the standard connection of Czech Telecom (with the ‘0’ prefix). If you then f
            us know and describe the failure (in your report, kindly include the time, your telephone 
            number of the person you were trying to call, eventually some further description of the p

            your report to voipadmin(zavinac)cuni.cz [ MAIL "voipadmin(zavinac)cuni.cz"]

            Email: voipadmin(zavinac)cuni.cz [ MAIL "voipadmin(zavinac)cuni.cz"]