At+t Corp.

At&t Bell Laboratories

American Telephone and Telegraph, Co.

Andreas Constantine Papanicolaou

Murali Aravamudan

Kumar K Vishwanathan

Nuri Ruhi Dagdeviren

Cheng D Yu

Khashayar Mohammadi

Jerry Eisdorfer

Allen Eisdorfer

Deirdre T Ryan

Walter Patrick Binns

Cheng David Yu

The present invention is directed to a technique for collaborative browsing among users at two or more different PCs. In an illustrative system in accordance with the present invention, copies of selected URLs are shared among collaborating PCs, each of which uses the URL to retrieve the corresponding document. In this system, a PC is configured to select hyperlinks for itself and one or more other PCs. Each URL corresponding to a selected hyperlink is communicated via the Internet (using standard Internet protocols) to a server. The server broadcasts the URL to the collaborating PCs each of which retrieves the corresponding document in conventional fashion. The server knows the IP addresses of the collaborating PCs through a collaboration set-up process which occurs in advance of the actual collaborative browsing session.

Collaborative browsing of the internet

Collaborative browsing

The Multimedia Message System of the present invention provides revenue allocation between disparate sender-receiver service providers on a per message basis for a sender, connected to a telecommunications network of one service provider, sending a message to a receiver, connected to a telecommunications network of another service provider. Each message has a 'message stamp' associated with it which allows for distribution of revenue associated with that individual message among service providers involved for transmission of that message. A Clearinghouse is utilized to issue the message stamps and process revenue allocation for each service provider according to the message stamps. The stamp is added to each message by the clearinghouse to provide for revenue allocation between the originating (sender) and destination (receiver) service providers. Removal or canceling of the stamp is performed by the destination unit that may additionally route the message to a mailbox (e.g., service node) or further destination service providers. The stamp revenue is shared by the message sender service provider, the stamp issuer, and message receiver service provider, the collector of the used/canceled stamp. The canceled stamp may be exchanged or redeemed between the service providers via their respective clearinghouses, for currency or additional stamps according to a predetermined revenue sharing arrangement between participating service providers.

Multimedia message system with revenue allocation

A single medium (audio) voice grade call initiated by an ISDN video phone and directed to another ISDN video phone is converted into a multimedia (audio and video) ISDN call by a) maintaining the connection for the voice grade call while the ISDN audio and video connection is being established over a bearer channel of the ISDN subscriber loop different from the bearer channel being used by the voice grade connection, b) switching the audio signals from the voice grade call to the ISDN audio and video connection, once the ISDN audio and video connection is established, and c) tearing down the initial voice grade call.

ISDN-based system for making a video call

In a video telephony system, a coaxial cable network, which is preferably a part of an existing cable television system, provides a local link for the transmission of the video telephone signals between each originating and destination location and a respective 'head end' located on the cable company premises. Each of the head ends is connected to a 'point of presence' of a telephone interexchange carrier so that a connection between pairs of head ends, and thus between a pair of video telephone locations, can be made via a switched digital network maintained by the carrier. Certain of originating and destination locations comprise a standard television set, serving as the audio/video display, and a consumer-type camera or camcorder, serving as the audio/video source. Others of the originating and destination locations comprise ISDN video telephones which are connected to the various points of presence of the interexchange carrier via local exchange carrier telephone networks. The video telephone number for cable subscriber locations are administered to be the same as the standard ten-(i.e., area code plus seven-) digit telephone number used for regular telephone calls directed to those locations.

Bidirectional video telephony between cable television and switched

In a video telephony system, a coaxial cable network, which is preferably a part of an existing cable television system, provides a local link for the transmission of the video telephone signals between each originating and destination location and a respective 'head end' located on the cable company premises. Each of the head ends is connected to a 'point of presence' of a telephone interexchange carrier so that a connection between pairs of head ends, and thus between a pair of video telephone locations, can be made via a switched digital network maintained by the carrier. Certain of originating and destination locations comprise a standard television set, serving as the audio/video display, and a consumer-type camera or camcorder, serving as the audio/video source. Others of the originating and destination locations comprise ISDN video telephones which are connected to the various points of presence of the interexchange carrier via local exchange carrier telephone networks. The video telephone numbers for cable subscriber locations are administered to be the same as the standard ten- (i.e., area code plus seven-) digit telephone numbers used for regular telephone calls directed to those locations.

Video telephony dialing

Growing community of inventors

Lincroft, NJ, United States of America

Andreas Constantine Papanicolaou