7275 results about "Modem device" patented technology

A headend or central office or satellite uplink facility for receiving upstream video-on-demand requests and MPEG transport streams containing video program data and packetizing said video data into TCP / IP or UDP / IP packets and LAN packets and routing them through a switch to one or more cherrypicker multiplexers. Each cherrypicker multiplexer receives LAN packets, depacketizes the MPEG data, partially or fully decompresses the data and recompresses the data to another smaller bandwidth, and repacketizes the data into MPEG packets or TCP / IP or UDP / IP packets. The repacketized TCP / IP or UDP / IP packets are transmitted directly to the customer as TCP / IP or UDP / IP packet data. MPEG packets generated by the cherrypicker multiplexer are, optionally, encapsulated in LAN packets addressed to an IP dewrapper circuit. There, they are depacketized back to MPEG packets and transmitted to the appropriate transmitter or modem for transmitting to a customer. Internet data and data from application servers, referred to as iData, can also be transmitted to customers through the cherrypicker multiplexers or a downstream modem, and upstream iData can be received through the modem.

An embodiment of the invention is a client on a local area network that periodically and automatically evaluates its physical connectivity with the local area network, exercises local-network services such as DHCP, and verifies Internet connectivity and function by pinging one or more numerically specified IP addresses and by pinging one or more IP addresses specified by an FQDN (Fully Qualified Domain Name) known to the assigned DNS servers. An embodiment of the invention may include a plurality of client elements monitoring one or more networks. Functionality according to embodiments of the invention can send notices, automatically initiate action, and otherwise assist in, among other things, remote monitoring and administration of networks, and particularly wireless networks.

A system for instantaneously monitoring traffic congestion including a plurality of monitoring electronic devices located in motor vehicles traveling on roadways in a selected region. Each monitoring electronic device is coupled to a GPS receiver that provides physical location to a wireless modem capable of connecting to a wireless communication network. The system also includes a central computer connected to a wide area network that is able of continuously downloading physical location information from a plurality of monitoring electronic devices also connected to the wide area network. The central computer uses a traffic monitoring software program and a mapping database containing roadway information for a region and the movement information from the monitoring electronic devices to create a continuously updated traffic congestion database. Authorized users of the system are able to log onto the central computer to a portion of the database that contains specific traffic flow and congestion information. Using the system, users are also able to obtain estimated times of arrival for a specific trip, and recommendations on alternative route information. The system can also take into consideration current or anticipated events that may affect traffic congestion.

The present invention relates to a personal shopping system for combined use in both the home of a user and a shopping establishment. The system includes a host computer which is coupled to a host modem and, optionally, to at least one wireless multi-access point. The portable terminal can be used in both the shopping establishment and the home of the user. It is configured to read bar codes associated with items related to shopping, and includes a memory, a bar code reader, a wireless transceiver, and a data interface. The data interface of the terminal communicates with a data interface of the shopping establishment kiosk cradle or directly with the shopping establishment's communications network.

A method and corresponding system for updating or installing new software loaded into the memory of an implantable medical device(IMD) implanted within a body of a patient is described. The updated or new software may be installed in the memory of the IMD without the patient having to travel to a clinic or hospital, and may be effected by employing modem telecommunication and Internet techniques in conjunction with a remote computer system.

A computing environment with methods for monitoring access to an open network such as the Internet, is described. The system includes one or more client computers, each operating applications (e.g., Netscape Navigator or Microsoft Internet Explorer) requiring access to an open network, such as a WAN or the Internet, and a router or other equipment that serves a routing function (e.g., a cable modem) for the client computers. A centralized security enforcement module on the router maintains access rules for the client computers and verifies the existence and proper operation of a client-based security module on each client computer. The router-side security module periodically sends out a router challenge via Internet broadcast to the local computers on the network. If the client-side security module is installed and properly operating, the client-side security module responds to the router challenge. The responses received by the router-side security module are maintained in a table. Each time the router receives a request from a client computer to connect to the Internet, the router-side security module reviews the table and analyzes whether or not the computer requesting a connection to the Internet properly responded to the most recent router challenge. If it determines that the computer has properly responded to the router challenge, then it permits the computer to connect to the Internet. If a computer has not properly responded or if a computer has not answered the router challenge, then the computer is not allowed to connect to the Internet as requested.

A power line communications device that may provide rate limiting and quality of service control is provided. The device may include a first modem in communication with one or more user devices via a low voltage power line subnet and a second modem communicatively coupled to a second communications medium. The device also may include a controller in communication with the first and second modems and a computer readable medium encoded with instructions to control the operation of the controller. The controller may rate limit data to and / or from a destination and / or source based one or more parameters such as the destination address, the source address, the type of data, temporal parameters, and other criteria. In addition, the controller may implement QoS for data and transmit QoS parameters to power line modems to allow the power line modems to perform QoS.

The present invention relates to a personal shopping system for combined use in both the home of a user and a shopping establishment. The system includes a host computer which is coupled to a host modem and, optionally, to at least one wireless multi-access point. At least one shopping establishment kiosk cradle is employed to interface with a portable terminal which is also part of the system. The portable terminal can be used in both the shopping establishment and the home of the user. It is configured to read bar codes associated with items related to shopping, and includes a memory, a bar code reader, a wireless transceiver, and a data interface. The data interface of the terminal communicates with a data interface of the shopping establishment kiosk cradle. A home cradle for the portable terminal is also provided and is adapted to remain in the home of the user. It includes a home portable terminal-receiving station and a home data interface to communicate with the data interface of the portable terminal. A home data transfer circuit is also included to permit data exchange between the home data interface and the modem coupled to the host computer.

A facility transport system for transporting high speed Ethernet data over digital subscriber lines. The system, referred to as 100BaseS, is capable of transmitting 100 Mbps Ethernet over existing copper infrastructure up to distances of approximately 400 meters. The system achieves bit rates from 25 to 100 Mbps in increments of 25 Mbps with each 25 Mbps increment utilizing a separate copper wire pair. Each pair used provides a bidirectional 25 Mbps link with four copper wire pair connections providing 4×25 Mbps downstream channels and 4×25 Mbps upstream channels. The system utilizes framing circuitry to adapt the 100BaseT input data signal to up to four separate output signals. A DSL Ethernet Port card couples the modem to each twisted pair used. Each DSL Ethernet Port card comprises modem transmitter and receiver circuitry for sending and receiving 100BaseS signals onto twisted pair wires. The system utilizes QAM in combination with frequency division multiplexing (FDM) to separate downstream channels from upstream channels and to separate both the downstream and the upstream channels from POTS and ISDN signals.