| 摘要 |
FIELD: information technology.SUBSTANCE: system for secure telephone communication has telephone receivers, subscriber lines (SL), a line input unit, a first switching unit, a signal analysis unit, an automatic telephone exchange (ATE), as well as a program control unit, an automatic vocoder unit (AVU), an interfacing unit, a second switching unit, an interaction and control signal unit (ICS), first and second cryptographic units, a channel input unit connected to long distance channels (LDC), a subscriber telephone terminal (STT) and a digital subscriber line. The system also includes a line input unit, a program control unit, an AVU, an interfacing unit, an ICS unit, a second cryptographic unit, a channel input unit connected to LDC, STT and a digital SL; the ATE consists of a subscriber line unit, a jack field unit, a server unit, a workstation unit, a channel set unit and a station control unit, which includes a first, a second and a third peripheral control unit, a random access memory unit, a central control unit, a program storage unit and a program replacement unit; connections between existing units have also been changed and they have additional functions.EFFECT: high security of transmitted information from unauthorised access.1 dwg |
