System and method for internet telephony with the use of terminal adapters in the public switched telephone network, terminal adapter and in this method used, as well as - internet telephony server and in this method used

摘要

A system and a method for internet telephony is disclosed, the internet telephony - services of a telephone to a other with the use of pstn - or isdn - terminal adapters can be realized. The system has a triggering ta (terminal adapter) (20 (tx)) for performing an internet telephony - operation process to a call request, for transmission of internet telephony - call information and for establishing a voice channel with a target - ta (20 (rx)) on the basis of internet telephony - call information on a connection signal from it, an internet telephony - server (40) for searching for a connection of the target - ta with the internet (30) to the call request and the transmission of the internet telephony - call information by the releasing ta, with it the target - ta via a public telephone network (isdn) for prompting a - internet telephony operations in accordance with the search result, and for transmitting the internet telephony - call information from the target - ta to the triggering ta, and it has the said target - ta for carrying out of the internet telephony - operation process it onto a transmitted via the public telephone network call arriving from the server, while its internet telephony - call information is transmitted. The target - ta to a set up by the releasing ta received connection actuation signal a voice channel with the triggering ta.