Clear channel interface module and method therefor

Details Clear channel interface module and method therefor Clear channel interface module and method therefor

1994-09-06

1996-11-26

Barr on, Jr., Gilberto

Cryptography

Key management

Having particular key generator

380 48, H04N 912

Patent

active

055793940

ABSTRACT:
A communication system (10) includes a channel (18) that conveys both clear and secure communications and a channel (12) that does not convey clear communications. An interface module (24) resides between these two channels. When a call is attempted through the two channels (12, 18), the module (24) plays a plain-text, audio voice message (54) into the clear side of the call. The message (54) instructs a human operator to take appropriate actions to cause an initiate security setup (ISS) signal (56) to be generated by a secure terminal (28). This message (54) is continuously repeated until the ISS signal (56) is detected at the module (24). The ISS signal (56) includes predetermined frequency components which are notched out of the message (54) so that the ISS signal (56) may be reliably detected at the module (24).

REFERENCES:
patent: 5177734 (1993-01-01), Cummiskey et al.
patent: 5185783 (1993-02-01), Takahashi et al.
patent: 5216519 (1993-06-01), Daggett et al.
patent: 5230020 (1993-07-01), Hardy et al.
patent: 5392357 (1995-02-01), Bulfer et al.

Affiliated with

Also associated with

Rating

Clear channel interface module and method therefor does not yet have a rating. At this time, there are no reviews or comments for this patent.

If you have personal experience with Clear channel interface module and method therefor, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Clear channel interface module and method therefor will most certainly appreciate the feedback.

Rate now

Comments { 0 }

Profile ID: LFUS-PAI-O-1979586