Multiple access telephone extension systems and methods

Details Multiple access telephone extension systems and methods Multiple access telephone extension systems and methods

1991-10-07

1994-06-07

Olms, Douglas W.

Multiplex communications

Wide area network

Packet switching

370 50, 370 953, 375 1, 379 61, 455 561, H04B 7204, H04J 1300, H04J 316

Patent

active

053196341

ABSTRACT:
A method and system for conducting multiple access simultaneous telephone communications in full duplex either over the power lines of a building or using RF transmission. It employs a combination of multiple access techniques selected from among the following: time division, code division, and frequency division. The following features result: a) security coding to prevent unauthorized access and eavesdropping, b) multiple simultaneous conversations through identical and closely coupled transmission media, c) non-interference to other communications systems and users, and d) processing gain for operating in noisy environments.

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