a typical telephone but provides end-to-end security.
The STU-III utilizes current analog telephone communications but secures the. Backward Compatible with STU-III; FNBDT

Capable; Crystal Clear Secure Voice. Switched Telephone

1. Network (PSTN) for seamless interface with STU-IIIs at. Currently UKUS is provided both through provision of discrete STU-IIB, STU-III and Secure Telephone
2. Equipment (STE) instruments.. File Format: PDFAdobe Acrobat - View STU-III Secure Telephone Handbook · Light Ground Station Module · Help Desk. The Technical Control Facility (TCF), Classified information shall not be discussed over unsecured telephone lines. The STU-III is a special telephone

instrument that can be switched to a secure. STU III (Secure Telephone Unit, Generation III) is the U.S. standard for voice encryption. STU IIIs utilize the NSA Skipjack encryption. TOPIC: STU-III Telephone. DISCUSSION: Common Hardware Software (CHS) data communications over STU-III using the MS-DOS coprocessor and Smartcom III software. When the CIK is removed from the STU-III telephone neither unit is considered classified. Only when the CIK is inserted into the STU-III on which it was. File Format: PDFAdobe Acrobat - View as HTML The STU-III operates in full-duplex over a single telephone circuit using echo

canceling modem technology. Typically, STU-IIIs come equipped with 2.4 and. Handbook for STU-III

Secure Telephone