2002 - cesnet

ation with students at the Strahov student hostels, where the use of softwareclients is likely to be extensive. Microsoft Messenger is probably the best-knownsoftware client. However, we would like to point out the problem of the new version5, where it is impossible to configure servers other than .NET. We thereforerecommend using version 4.6.8.7 Peering with Foreign NetworksBased on the positive experience with peering with the CERN network in Switzerland,we decided to extend peering to some other localities. We encounteredtwo complications. First, there were not enough interesting localities availablefor IP telephony. Except for AARNET (Australian Network for Research and Education),it is difficult to find a larger installation of IP telephony that we coulduse for mutual peering, in line with the status of CESNET2. Another complicationis associated with interoperability – various networks make use of varioustypes of components (gatekeepers and voice gateways) and their mutual communicationcan be problematic.We deployed trial international peering to five universities of the IP telephonytestbed in Internet2, together with the Australian AARNET network. We alsoconnected to the international hierarchy of gatekeepers, arised from the initiativeof the project titled Welsh Video Network and the SURFnet network. Again,one of the problems is that there are not enough interesting call destinations.8.8 Definition of Future ObjectivesThe project will further consist of two sections – an operational and a researchone. We intend to continue in the verification of new technologies and protocols,implementation of new services and extension of the VoIP infrastructureaccording to users’ requirements:Operating section:• Connection of other customers according the users’ requirements, continuousproject evaluation and monitoring the operation of the VoIP network.• Peering with other networks.Research Section:• Experiments in IP telephony with SIP signalling.• Connection of IP phones.• OpenH.323 project.• Statistical evaluation of traffic.High-speed National Research Network and its New Applications 2002119