A system and method for selectively establishing a user information path over an information transport network between first and second endpoints of first and second private network partitions, respectively. The system comprises: (1) signalling circuitry, associated with the first and second private network partitions, adapted to establish a signalling channel adapted to communicate signalling messages between the first and second private network partitions, the signalling channel allowing: (a) the first private network partition to initiate a call request to the second private network partition to request initiation of a call from the first endpoint to the second endpoint and (b) the second private network partition to initiate a response to said call request of the first private network partition to acknowledge that the second endpoint is able to receive the call from the first endpoint and (2) switching circuitry, associated with the first and second private network partitions, adapted to establish a user information path over the information transport network only after the first private network partition receives the response to the call request the user information path adapted to allow point-to-point communication of user information between the first and second endpoints, the user information path never established if the second endpoint is unable to receive the call from the first endpoint.

System and method for signalling and call processing for private and hybrid communications systems including multimedia systems

A technique is disclosed for use in conjunction with an ISDN communications system for permitting a host computer, that is executing a host session with a user and is connected through the system, to dynamically change an ISDN access path, that connects the user to the host computer and carries the host session therebetween, between a packet switched connection and a circuit switched connection during the occurrence of the session in order to provide the particular connection that is most suited to the communication requirements of a task currently being executed during the session by the host computer. Any such dynamic change of the ISDN access path is invoked by the host computer, does not disrupt the host session and is substantially transparent to the user.

Technique for dynamically changing an isdn connection during a host session

The present invention provides a facility management platform to monitor and view the status of a plurality of individually addressable downstream devices including, but not limited to, addressable terminals, IRG's, settops, cable modems, taps, nodes, and/or hubs at a network control center. The FMP may display problems at these downstream devices, for example, power loss, and/or may automatically notify the appropriate companies and/or personnel to correct the problem.

Facility management platform for a hybrid coaxial/twisted pair local loop network service architecture

A unique four function surgical instrument that performs aspiration, irrigation, dilation and cauterization with an innovative trigger mechanism. An embodiment is “gun-like” in configuration having a housing with a depending handle and a protruding trigger, a forward extending pair of forceps-like arms that terminate in dilation/cauterization tips and a common conduit between the forceps-like arms. The unique trigger mechanism utilizes a pinch valve concept where the trigger button has an elongated portion that has two slide surfaces with offset a recesses that act like tracks on which pinch sliders follow and the pinch sliders act like valve stems that squeeze close and allow to open silicone tubing. The end result, being a single poll, two stage actuator such that a half a pump of the trigger delivers irrigation or aspiration and a full pump delivers the other. The instrument provides the advantages of small size, ergonomical and all-in-one so as to eliminate the need for a surgeon to fumble around in switching between instruments.

Four function surgical instrument

An integrated packet switching and circuit switching system comprising a number of switching modules (1000) each connected to a different plurality of user terminals (1001). Each switching module includes a time-slot interchange unit (1011) for providing circuit-switched communication channels and a control unit (1017) that controls the operation of the time-slot interchange unit. Each switching module also includes a packet switching unit (1400) used both to provide packet-switched communication channels among the user terminals connected to that switching module, and to switch control information between the user terminals (1001) and the control unit (1017) to establish circuit-switched calls and packet-switched calls.

Integrated packet switching and circuit switching system

The system switches first lines, each having a circuit mode channel and a packet mode channel, second circuit mode lines and third and fourth packet mode lines. The first lines are connected to subscriber equipments, each of which convoys both multiplexed channels which have a rate equal to that of the other lines. The second and third lines are connected to outside switching networks while the fourth lines are connected to a packet switching network. The number of the fourth lines is less than the sum of numbers of first and third lines. The fourth lines convey packets for all the connections established between two first lines or between a first line and a third line, or between a first line and the packet transmission medium served by the switching network. The system distinguishes the circuit mode channel and the packet mode channel in a first line. Switching is controlled either in response to the detection of the absence of flags in the incoming packet mode channel of a first line or in an incoming third line, or from switching network for a link from this network from a first or third line.

Time division switching system for circuit mode and packet mode lines

Time division switching system of the type comprising incoming time-division switching networks, intermediate space-division switching networks and outgoing time-division switching networks. The incoming and outgoing time-division switching networks are respectively output controlled and input controlled or vice versa. They are controlled by a single control store for the two directions of transmission. Due to the serialization of the incoming and outgoing time-division junctions connecting respectively the incoming and outgoing time-division switching networks to the intermediate space-division switching networks, the space-division switching networks can be controlled by a single control store for the two directions of transmission.

Time division switching system of the {37 time-space-time{38 {0 type

Time division switching system of the "time-space-time" type

The switching network included in the system is connected to circuit mode and/or packet mode mono- or multi-channel digital lines via connection modules. These modules enable the system connections to be standardized and accept thus any number of multiplexed channels in the lines and any transmission mode, namely duplex or half-duplex. The flag/packet transition in a packet mode channel is detected in a connection module and is transmitted as a particular word in a predetermined time interval of the outgoing multiplex of this module, at the same time as the address of the channel, thereby precluding the use of purpose-built links.

Time division switching system for circuit mode and packet mode channels

Le reseau de commutation (1) du systeme est raccorde a des lignes numeriques mono- ou multicanales en mode-circuit et/ou en mode-paquet a travers des modules de raccordement (RM). The switching network (1) of the system is connected to mono- or multichannel digital line circuit mode and / or packet mode through the connection modules (RM). Ces modules permettent de banaliser le raccordement du systeme, quel que soit le nombre de canaux multiplexes dans les lignes et leur mode de transmission, duplex ou semi-duplex. These modules enable commonplace connecting the system, regardless of the number of multiplexed channels in the lines and their mode of transmission, duplex or half duplex. La transition fanion/ paquet d'un canal en mode-paquet est detectee dans un module de raccordement et est transmise sous la forme d'un mot particulier dans un intervalle temporel predetermine du multiplex sortant (MUXS) de ce module, en meme temps que l'adresse du canal afin d'eviter l'emploi de liaisons specifiques a cet usage. The transition flag / packet of a channel in packet mode is detected in a connection module and is transmitted in the form of a particular word in a predetermined time interval of the outgoing multiplex (MUXS) of the module, together with the channel address to avoid the use of specific links to this use.

Olivier Louvet

Papers

Time division switching system for circuit mode and packet mode lines

Time division switching system of the {37 time-space-time{38 {0 type

Time division switching system of the "time-space-time" type

Time division switching system for circuit mode and packet mode channels

Time division digital switching system for channels in circuit and packet mode