2002 - cesnet

In September, we succeeded in reducing the price and extending the call destinationsto sixteen selected international destinations. See the table below forseveral examples of call charges (a complete price list is available at request).We inform all the connected institutions about any changes in the prices accordingto the valid contractual terms. The price is charged by seconds, withoutany minimum charged length.Prague 4202 CZK 0.82/min (Mon–Fri, 7:00–19:00)CZK 0.52/min during offpeak hoursAustria 43 CZK 1.93/minUS 1 CZK 2.01/minTable 8.1: Call charges (examples)Technical conditions concerning the connection to a private branch exchange:• A branch exchange can be connected only with a digital interface (ISDNBRI, ISDN PRI),• The exchange must provide the identification of the caller,• The operator of the private branch exchange (PBX) makes modificationsof the charges in the tariff application and in the exchange, authorizingbranches for access to IP telephony,• The terminal point of the VoIP network interface is the voice gateway interface,connection of PBX to the VoIP network interface is carried out by theoperator of PBX, the type and the interface setting must be specified priorto the deployment (type of interface ISDN/BRI or ISDN/PRI, Network-sideor User-side setup, PRI with or without CRC4).Technical conditions concerning the connection to a voice gateway:• Authorized employees of CESNET must have access to the voice gateway,• The voice gateway must provide information concerning the calls madeusing the RADIUS protocol,• The gateway must be compatible with the existing VoIP solution (VoiceGateway on Cisco platform, series AS5300, MC3810, C36xx, C26xx, C17xx).In addition to the advantages of free calls through the CESNET2 network, entitiesresiding outside Prague can make use of IP telephony to access the PSTNand reach up to a 50 % reduction of the long-distance call charges. Entities inPrague may reach savings of approximately 30 %.Universities pay for their PSTN calls. A bill is made out on a monthly basis, comprisingthe overall number of calls made, minutes called and the total amountcharged. We provide a detailed summary of individual calls only by request.However, CESNET has the necessary data at its disposal and in case of any108 High-speed National Research Network and its New Applications 2002