Inbuilding telephone communication system

Details Inbuilding telephone communication system Inbuilding telephone communication system

1991-11-21

1994-09-20

Chin, Stephen

Telephonic communications

Having light wave or ultrasonic link for speech or paging...

Including fiber optic link within telephone network

379 58, 379 60, 455 331, 455 333, 455 341, H04M 1100, H04Q 700

Patent

active

053496310

ABSTRACT:
An Inbuilding Communications System for providing telephone communication to a first set of portable telephones located in a first area and to a second set of portable telephones located in a second area; the first set of portable telephones transmit and receive a first set of radio signals having a set of assigned frequencies; the second set of portable telephones transmit and receive a second set of signals having the same set of assigned frequencies; the first and second areas are separated by a structure which attenuates radio signals. A first set of at least two antennas is located inside the first area for communicating with the first set of portable telephones. The number of antennas and the position of each antenna in the first set of antennas are chosen such that the first set of radio signals is attenuated below a pre-determined level after passing through the structure. A second set of at least two antennas is located inside the second area for communicating with the second set of portable telephones. The number of antennas and the position of each antenna in the second set of antennas are chosen such that tile second set of radio signals is attenuated below a pre-determined level after passing through the structure.

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