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All
Products for US Patent 4672658 - Spread spectrum wireless
PBX
Inventor(s): Kavehrad; Mohsen (Holmdel, NJ),
McLane; Peter J. (Kingston,CA)
Owner:
AT&T Company and AT&T Bell Laboratories (Murray Hill,
NJ)
Filing
Date: October 23, 1986
Issue
Date: June 9, 1987
Abstract: The present invention relates to a
wireless PBX network wherein direct sequence spread spectrum
multiple access is used for voice and data communications to support
a plurality of local-local and local-external calls. The present
wireless PBX arrangement comprises a plurality of local user
transceivers using a first separate unique chip sequence patterns
for information communication and a second common chip sequence
pattern for call-set up; and a central PBX comprising (a) a
plurality of PBX transceivers, each of which uses a separate first
chip sequence pattern which is matched to a corresponding local user
transceiver; (b) a switching means for interconnecting local users
to each other or to an external network via the associated PBX
transceivers; and (c) a call set-up receiver responsive solely to
initial call set-up information sent by any user using the second
common chip sequence pattern. Optional selection diversity or equal
gain combining diversity and/or error correction encoding may also
be included in the transceivers. | 
