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Unregulated, rugged and cost-effective local communications security (ComSec). Highly recommended as our best do-it-yourself system that beats GMRS, MURS, etc. hands down. Our family relies on the i355 when we are traveling via multi-vehicle convoy and for activities that are perfectly legal but require more discretion and operational security (OPSEC).
Excerpts from the eBook:
As of 2019, the Motorola i355 phone remains the only entry-level priced hand-held transceiver offering digitally encoded, spread spectrum (frequency hopping) communication in a license-free band. As of this writing, used Motorola i355s can be purchased on eBay for under $30 each, and in some cases under $20.
No longer produced by Motorola, the i355 was originally marketed as a cell phone with an off-network simplex capability referred to as DirecTalk mode. Operating on the license-free 900MHz ISM band (industrial, scientific, medical) and using the same algorithms and frequency hopping rate as Motorola’s more expensive purpose-built DTR series of radios, these units are capable of generating 1 billion unique private channels through the manipulation of each phone’s Private Telephone Number (PTN).
Additionally, the Motorola i355 meets military specifications for shock, dust and water resistance and is compatible with a variety of hands-free earpieces and microphones for quiet operation.
What this practically means is that you can outfit an entire retreat group with 10 of these radios for the price of one Motorola DTR, yet have the same capability to shut out eavesdropping by anyone short of a military signals intelligence unit.
Learn how to assemble, program and use Motorola i355 phones as secure, frequency-hopping radios. This eBook explains everything you need to know.
Excerpts from the eBook:
As of 2019, the Motorola i355 phone remains the only entry-level priced hand-held transceiver offering digitally encoded, spread spectrum (frequency hopping) communication in a license-free band. As of this writing, used Motorola i355s can be purchased on eBay for under $30 each, and in some cases under $20.
No longer produced by Motorola, the i355 was originally marketed as a cell phone with an off-network simplex capability referred to as DirecTalk mode. Operating on the license-free 900MHz ISM band (industrial, scientific, medical) and using the same algorithms and frequency hopping rate as Motorola’s more expensive purpose-built DTR series of radios, these units are capable of generating 1 billion unique private channels through the manipulation of each phone’s Private Telephone Number (PTN).
Additionally, the Motorola i355 meets military specifications for shock, dust and water resistance and is compatible with a variety of hands-free earpieces and microphones for quiet operation.
What this practically means is that you can outfit an entire retreat group with 10 of these radios for the price of one Motorola DTR, yet have the same capability to shut out eavesdropping by anyone short of a military signals intelligence unit.
Learn how to assemble, program and use Motorola i355 phones as secure, frequency-hopping radios. This eBook explains everything you need to know.
Excerpt from the introduction:
APPENDIX A:
APPENDIX B:
