State Research Center of the Russian Federation
Concern CSRI Elektropribor, JSC

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Self-powered telephone intercommunication system BTS

    
The equipment is intended for paired duplex telephone communication between users, as well as intercom (conference) duplex communication between switching operator and a group of users, in emergency situation including the failure of onboard power supply system.

It provides communication:
- in gas- and smoke-polluted areas and rooms (using throat mike headsets and respiratory protection units);
- in rooms with high air pressure up to 10kg/cm2.

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Journal "Giroskopiya i Navigatsiya" website (in Russian)
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• Autonomous attitude control system for low-orbiting spacecrafts