Method and apparatus for transmitting short messages between fixed line and cellular telephone networks

摘要

The arrangement allows a user 10 of a PSTN network 1 to transmit an SMS type message to a second user of a cellular network and vice versa. Messages are transmitted via a first server 20 of the PSTN 1 and a second server 30 acting as a short message service centre of the cellular network 2. Short messages are supplemented with an additional field uniquely identifying the first server, either at the first server or at the second user apparatus.