Secure transmission over satellite phone network
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United States of America Patent
Stats
-
Dec 16, 2014
Grant Date -
Sep 29, 2011
app pub date -
Feb 11, 2011
filing date -
Mar 17, 2004
priority date (Note) -
In Force
status (Latency Note)
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Abstract
A reach back secure communications terminal includes a modem to satellite interconnect board that captures DTMF tones, demodulates encrypted modem information, and converts both into an ASCII string for presentation to a data port of a satellite phone, allowing out-of-band control of a non-secure satellite system (e.g., AT command control of a data port) by a user on a secure side of an encryption device, by including the ability to interpret control signals and control the satellite system appropriately. A false dial tone is presented to the encryption device, and the data stream coming from the encryption device is monitored for the presence of dual-tone, multi-frequency (DTMF) tones representing control signals, the DTMF tones are converted to ASCII characters, which are in turn received as control signals by the satellite phone, allowing control of the functions of the satellite system directly from the secure side of the encryption device.
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