3com Corporation

Utstarcom, Incorporated

3 Com Corporation

Ikhlaq S Sidhu

Guido M Schuster

Michael S Borella

Jerry J Mahler

Jacek A Grabiec

David A Grabelsky

Frederick D Dean

Thomas J Kostas

Andrew Bezaitis

Sagan S Sidhu

Ronnen Belkind

Nurettin B Beser

Danny M Nessett

Brian David Petry

Thomas A Gentles

Ismail Dalgic

James M Kroll

Igor Lasic

Vandana Upadhyay

Parin Mody

Jones Brobbey

Thad Konar

Mike Borella

A system and method for Internet telephony between a caller station and a callee station are described. The caller station is connected to a first edge network via a first telephony interface, and the callee station is connected to a second edge network via a second telephony interface. An intermediate network is connected to the first edge network via a first router and is connected to the second edge network via a second router. The callee station is associated with a callee station number. The first router initiates the call in response to a setup message that includes the callee station number. A first gatekeeper, controlling the first router, and a second gatekeeper, controlling the second router, together mediate the process of setting up the call. A back end server, in communication with the first and second gatekeepers, stores the addresses and station numbers needed to set up the call. During the call, the first router performs network address translation to transmit signals between the first edge network and the Internet, and the second router performs network address translation to transmit signals between the second edge network and the Internet.

Internet telephony using network address translation

Gateway routers for real-time networks have the ability to collect delay, loss, and jitter statistics on a per-connection basis. It is possible to use this information not only to monitor the quality of individual voice calls and other real-time connections, but also to evaluate the overall performance of the underlying network. This paper describes a method for monitoring and managing the performance of a real-time data network that supports voice, video and other real-time services. In the described embodiments, the RTCP mechanisms of RTP for sender and receiver reporting be used to relay performance information to one or more network monitoring sites for analysis and interpretation. In addition, gateway routers are organized and managed within a hierarchy that allows the monitoring function to localize it view of network conditions within the hierarchy; and the monitoring of network performance can occur on various time scales.

Method and system for monitoring and management of the performance of real-time networks

A method and system for distributed network address translation with security features. The method and system allow Internet Protocol security protocol ('IPsec') to be used with distributed network address translation. The distributed network address translation is accomplished with IPsec by mapping a local Internet Protocol ('IP') address of a given local network device and a IPsec Security Parameter Index (&#x201c;SPI&#x201d;) associated with an inbound IPsec Security Association (&#x201c;SA&#x201d;) that terminates at the local network device. A router allocates locally unique security values that are used as the IPsec SPIs. A router used for distributed network address translation is used as a local certificate authority that may vouch for identities of local network devices, allowing local network devices to bind a public key to a security name space that combines a global IP address for the router with a set of locally unique port numbers used for distributed network address translation. The router issues security certificates and may itself be authenticated by a higher certificate authority. Using a security certificate, a local network device may initiate and be a termination point of an IPsec security association to virtually any other network device on an IP network like the Internet or an intranet. The method and system may also allow distributed network address translation with security features to be used with Mobile IP or other protocols in the Internet Protocol suite.

Method and system for distributed network address translation with network security features

A system and method for accessing a data network telephony account using a wireless personal information device (PID). The user may connect over the wireless cellular infrastructure to a telephony control server via a data network for access to the user's telephony account, which indicates the user's telephone number in a telephone number entry. Once the connection is made, the user issues a command to set the telephone number entry in the user's data network telephony account to a specific telephone number. The user may then invoke a contacts application in the wireless PID and select a person to call from the contacts list. The user selects the entry to send a command to initiate a telephone connection between the party selected and the user at the telephone designated by the user at the telephony control server.

System and method for controlling telephone service using a wireless personal information device

A telephony system and method having a switch for analog voice and data signals that is connected to a first network, and a router for routing Internet Protocol packets that is connected to a second network using Internet Protocol addressing. The telephony system and method also includes a telephony gateway that is connected to both the switch and the router for converting analog voice signals into Internet Protocol packets and for converting Internet Protocol packets into analog voice signals, the telephony gateway being connected, and a remote access server that is connected to both the switch and the router for converting analog data signals into Internet Protocol packets and for converting Internet Protocol packets into analog data signals. The switch may have a switch matrix capable of being connected to the Public Switched Telephone Network, a line rack with a plurality of line cards connected to the switch matrix, and a trunk rack with a plurality of trunk cards connected to the switch matrix. The switch matrix may also be connected to the telephony gateway and the remote access server.

Architecture for a central office using IP technology

A Medium Access Control ('MAC') Layer protocol and a method for contention resolution using the protocol is provided for networks with multiple priority traffic. The protocol is used where a physical layer connected to a transmission medium uses a carrier modulation scheme with multiple frequencies. Stations on the network that desire access to the transmission medium use a carrier modulation scheme with multiple frequencies. Stations that desire access simultaneously transmit a single frequency selected at random from a set of physical layer frequencies during an open-contention-interval. At the same time, the stations listen to a combined frequency signal and analyzes it for frequency content. The station whose own frequency matches the highest frequency signal in the combined signal gains access to a transmission medium. In the event of a collision, a restricted-contention-interval is used only for the colliding stations. The probability of successful contention resolution increases very rapidly using the restricted-contention-interval. By partitioning the set of frequencies in contiguous ranges, multiple priority classes can be used with the contention method and the MAC layer protocol.

Method and protocol for a medium access control layer for local area networks with multiple-priority traffic

A system and method for providing advertising and advertising services using a telephone system. A data network telephony system includes a commercial message server that communicates with a telephony connection server to communicate commercial messages to display devices on data network telephones. A caller uses the data network telephone to make a telephone call to a callee. The commercial message server receives information about the connection and retrieves commercial messages, or advertisements to communicate to either the caller, the callee or both.

System and method for advertising using data network telephone connections

A system and method of accessing radio programming from radio stations that communicate radio programming on a data network. The radio programming is accessed as radio or audio signals formatted in radio-over-data packets to a data network telephone. The data network telephone is a telephone that uses voice-over-data communications channels over a data network to make telephone connections with other data network telephones. The data network telephone includes a display, a keypad, a handset and an optional speaker output. The data network telephone advantageously permits simultaneous access to radio programming and communication on a telephone connection. The data network telephone also includes an interface to a portable information device. A radio control application may be used on the portable information device that communicates control information to a radio application on the data network telephone. The PID may be used to set the desired radio station, volume and other settings that may be communicated to the radio application on the data network telephone.

System and method for accessing radio programs using a data network telephone in a network based telecommunication system

A system and method for performing messaging between telephones in a data network telephone system. The message communications may be managed by a messaging application connected to the data network. The messaging application detects when a telephone is connected to another telephone and sends a messaging input screen to the first telephone. The messaging application may determine the availability of other users for messaging and may control messages communicated between the first telephone and the other users. The messages may be text or voice messages.

System and method for performing messaging services using a data communications channel in a data network telephone system

Proximity-based registration of a user to a data network appliance on a data network telephony system. A portable information device, such as a PDA (Personal Digital Assistant) or passive proximity-based security badge, is associated with the user. When the portable information device is brought within a proximity range of a data network appliance, one or more messages are wirelessly transmitted between the portable information device and the data network appliance. The data network appliance then transmits a registration request to a registration server to register the user to the data network appliance. As a result, calls for the user will be routed to the data network appliance to which the user is registered.

Proximity-based registration on a data network telephony system

A system and method for enabling encryption and/or authentication services on a telephony network. A portable information device, such as a personal digital assistant is used to exchange encryption and/or authentication data with a second portable information device. The portable information devices may be linked to the telephony network to enable encryption and/or authentication services using the encryption and/or authentication data exchanged by the portable information devices.

System and method for enabling encryption/authentication of a telephony network

A system and method for providing service provider configured telephone service to a user of a data network telephone. The user connects a data network telephone to the data network. The data network telephone may establish a connection to a telephone configuration server. The data network telephone may communicate a part number, such as a serial number, to the telephone configurations server. The telephone configuration server retrieves a service provider configuration, such as a service provider proxy address to send to the data network telephone. The data network telephone may use the service provider proxy address to register and provision the data network telephone for service.

System and method for providing service provider configurations for telephones using a central server in a data network telephony system

System and method for distributed network address translation in a network telephony system. A first network phone with a first protocol, requests at least one locally unique port from a first network device. The first network phone and the first network device are located on a first network. The first network phone receives, with the first protocol, the at least one locally unique port from the first network device. At least one default or ephemeral port on the first network phone is replaced with the at least one locally unique port. A combination network address is created for the first network phone with the at least one locally unique port and a common external network address, thereby identifying the first network phone for communications with a second network device located on a second network. The second network device may, for example, be a second network phone. In a preferred embodiment, the first protocol is a Port Allocation Protocol, such as the Realm Specific Internet Protocol.

Distributed network address translation for a network telephony system

A system and method for providing telephone service to a user of a telecommunications device using a data network service provider. The data network service provider has a local service host that is accessible by a local access identifier. A caller uses a telecommunications device to dial the local access identifier to connect to the local service host. In response to a prompt, the caller dials a telephone extension that identifies the callee's telecommunications device. The local service host receives the telephone extension and verifies that the callee is a subscriber. The local service host then retrieves the gateway nearest the callee telecommunications device and opens a voice-over-data channel between the callee and caller gateways. The telephone conversation then proceeds between the callee and caller telecommunications devices over a public switched telephone network connection to the caller gateway, the voice-over-data channel and the PSTN connection to the callee telecommunications device.

System and method for providing telephone service having private branch exchange features in a voice-over-data network telephony system

A system and method for associating notes to a call with a portable information device, such as a personal digital assistant. In one embodiment, notes taken during a call are associated with information about the call, such as parties to the call, the date and time, and the subject matter of the call. Notes taken may include user input or PID data communicated across a telephony network, for example. In one embodiment, a portable information device links to a data network telephone to initiate a phone call. Information about the phone call is stored with notes taken to allow for later retrieval.

Growing community of inventors

Vernon Hills, IL, United States of America

Ikhlaq S Sidhu