1
Mohsen Kavehrad, Peter J McLane: Spread spectrum wireless PBX. AT&T Company and AT&T Bell Laboratories, David R Padnes, Erwin W Pfeifle, June 9, 1987: US04672658 (291 worldwide citation)

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 transceiv ...


2
John S Thompson, Thomas J Tierney Jr: Automated message retrieval system. AT&T Company, John C Moran, June 19, 1990: US04935954 (220 worldwide citation)

Apparatus for automatically polling message service systems to obtain messages for a user of the apparatus. The apparatus is a computer attached to the user's telephone connected to a communication switching system. The computer responds to messages from the communication switching system or to an i ...


3
Jean Jacques Werner: Spread-spectrum identification signal for communications system. AT&T Company, David R Padnes, July 24, 1990: US04943973 (203 worldwide citation)

A spread-spectrum signal which conveys identifying information for an associated information signal is superimposed on the associated signal and transmitted therewith. Such identifying information distinguishes between voice and data information signals and between different types of data informatio ...


4
Gerald R Ash, Billy B Oliver: Integrated network controller for a dynamic nonhierarchical routing switching network. AT&T Company, AT&T Bell Laboratories, AT&T Communications, Henry T Brendzel, May 26, 1987: US04669113 (132 worldwide citation)

A nonhierarchial switching system employing a modified unified algorithm for developing link sizes for paths that connect switches in the system and routing sequences for the switches in the system, and further employing means for updating the routing sequences to minimize potential blocking in the ...


5
John J Daly, James G Evans: Public cordless telephone. At&T Company, Samuel R Williamson, August 28, 1990: US04953198 (131 worldwide citation)

A cordless telephone employed in a public telephone system provides mobility and service at reasonable cost to users of portable communications equipment. The system includes a plurality of base units which are accessible by a plurality of similarly configured cordless telephones. Each one of these ...


6
Stella Y Lo, John R Lothrop, Steven G Spearman, Mary L Warren: Automatically-effected move of a subscriber between electronic message service systems in a network. AT&T Company, David Volejnicek, June 12, 1990: US04933967 (89 worldwide citation)

In a network (10) of voice-mail message service systems (12-14), each system includes an arrangement (22) for automatically moving the serving of one or more subscribers from itself to another system. In response to administrator (29) input, the source system retrieves each moving subscriber's mailb ...


7
Randy L Bartholomew, Peter L Johnson: Data conferencing arrangement for stations having keyboards and displays, using a keyboard buffer and a screen buffer. AT&T Company, David Volejnicek, July 3, 1990: US04939509 (81 worldwide citation)

An arrangement for data conferencing either multiple computers (FIG. 1), or multiple terminals with a computer (FIG. 4), includes software (21;511) for communicating keystrokes from conference participants to an application program (22;550) that is the object of the conference, and for communicating ...


8
Mohsen Kavehrad, Jack Salz: Combined cross polarization interference cancellation and intersymbol interference equalization for terrestrial digital radio systems. AT&T Company, AT&T Bell Laboratories, Patrick E Roberts, Robert O Nimtz, February 17, 1987: US04644562 (66 worldwide citation)

Data-aided equalization and cancellation in digital data transmission over dually polarized fading radio channels is disclosed. The present invention uses decision feedback structures with finite-tap transversal filters. Subject to the assumption that some past and/or future data symbols are correct ...


9
Norman C Chan, Leif K Pederson: Telephone switching system adjunct call processing arrangement. AT&T Company, AT&T Information Systems, James M Graziano, March 24, 1987: US04653085 (54 worldwide citation)

The adjunct call processing arrangement of our invention eliminates the separation between hard-wired telephone switching system computer facilities and customer owned switchably connectable computer facilities. A general purpose communication interface is provided which connects the customer provid ...


10
Bruce M Bales, Steven M London, Nancy K Schmidt: Automatic route selection of a private telephone network path on the basis of a public telephone network number. AT&T Company, AT&T Information Systems, John C Moran, April 28, 1987: US04661974 (53 worldwide citation)

A data structure and program routines for use in a private branch exchange telephone system (PBX) for automatically routing calls via a private telephone network in response to a dialed public telephone network number and for restricting outgoing calls from the PBX to specific public network telepho ...