Patent ID: 7864754

Claim:
A telecommunication system for transmission of messages, comprising: a short message service center, a first telecommunication terminal, a second telecommunication terminal, and a line-connected telephone network (PSTN) to which at least one of the first and second telecommunication terminals is connected, means in the first and second telecommunication terminals for implementing an SMS transmission protocol for inputting or outputting a short message, the SMS transmission protocol having specifically defining a data link layer and a physical layer, means for receiving a short message via an input keypad or a touchscreen on the first telecommunication terminal, means for converting the short message being into the short message format, means for establishing a logical connection setup by means of an adequately specified data link layer, means for transmitting the short message being in the short message format in an adequately specified physical layer using FSK off-hook signaling in the voice band to the short message service center and from the latter to the second telecommunication terminal, and means for converting, in the second telecommunication terminal, the short message obtained from the short message service center into an output format and being output, in particular on a display unit.