US Patent 6980768 Spread spectrum signal distribution throughout a building

The use of spread spectrum signaling distributed through a building ventilation system provides an effective and inexpensive communication system. The ventilation system is disposed within the building to move air throughout at least a portion of the building. An access point relays signals to a telecommunications system outside of the building. At least one antenna in communication with the access point is disposed within the ventilation system. Each antenna transmits and receives spread spectrum signals through the ventilation system.