TELEPHONE COMMUNICATION SYSTEM

摘要

A telephone communication system comprising a radiocommunication module (10) and a data encryption/decryption module (28), characterized in that the radiocommunication module (10) comprises a modem interface module (20) which is connected to the radiocommunication module (10) and controls an external modem (33). The encryption/decryption module (28) comprises a microcircuit support reader, an encryption/decryption circuit (29) and a vocoder circuit (30) receiving voice data to be encrypted or decrypted from the communication module (10). The encryption/decryption (29) of data is carried out directly in the encryption/decryption circuit (29) of the encryption/decryption module.