US PATENT SUBCLASS 455 / 554
.~.~ Remote private branch exchange (PBX) with wireless link to landline

Current as of: June, 1999
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455 /   HD   TELECOMMUNICATIONS

73  DF  TRANSMITTER AND RECEIVER AT SAME STATION (E.G., TRANSCEIVER) {9}
550  DF  .~ Radiotelephone equipment detail {17}
554.~.~ Remote private branch exchange (PBX) with wireless link to landline

DEFINITION

Classification: 455/554

Remote private branch exchange (PBX) with wireless link to landline:

(under subclass 550) Subject matter wherein a distant telephone switching unit (private branch exchange) is equipped to communicate via radio frequency connection in place of a wire-line link (e.g., trunk) to a wired telephone system.

SEE OR SEARCH CLASS

379, Telephonic Communications,

156+, for details of a PBX within a landline telephone network.