Unify Gmbh Co. Kg

Siemens Enterprise Communications, Inc.

Adtran Gmbh

Siemens Aktiengesellschaft

Thomas Nagel

Farrokh Mohammadzadeh Kouchri

Bizhan Karimi-Cherkandi

Schah Walli Ali

Evandro Hauenstein

Rodrigo Biermayr

David Wiebe

Johannes Ruetschi

Christian Garbin

Geert Fieremans

Keith Glasnapp

Ansgar Dirkmann

Stephan Beer

Scah Walli Ali

A method and system permit a backup entity of a redundant apparatus of a communication system that shares control of hardware resources or other network resources with an active entity to indirectly determine a status of the active entity based upon behavior and reaction to actions it takes in connection with resources it shares control of with the active entity. Such a method and system permit the backup entity to deduce the state of the active entity without having any a hardware connection or other communication connection with the active entity.

Method and apparatus for indirectly assessing a status of an active entity

A method and apparatus that tests video quality includes a superimposing of at least one code to a video that is to be transmitted by a communication device to another communication device. The at least one code is transmitted such that the superimposed at least one code is extractable and readable from the decoded video by the device that receives the transmitted video. The extracted at least one code may then be read to determine the quality level of the transmitted video. The determination of quality for the received video may be based upon one or more tests performed using at least one code extracted from the received video.

Method, device, and system for testing video quality

An optical transmission system comprises a metropolitan core network operated in a wavelength division multiplexing mode and connected via metro connection devices to access connections to optical network terminals connected by means of a passive optical splitter. The metro connection devices contain regenerators and wavelength converters, so that data regeneration takes place between the network terminals and the central management and switching unit. This makes it possible to cover distances around 100 km.

Optical transmission system

A digital telecommunications system, a method of reconnecting branches to a softswitch in a communications network and a program product for reconnecting branches to a softswitch in a communications network. A softswitch manages communications between devices at network endpoints, e.g., session initiation protocol (SIP) devices. When a branch is disconnected from the softswitch, the softswitch manages reconnects, prioritizing reconnects when multiple branches request reconnecting.

Method and apparatus for selective recovery from branch isolation in very large VoIP networks

A private communications network and method of managing calls in a private communications network. A Session Border Controller (SBC) listens for private network voice communications originating from private communications devices, e.g., Session Initiation Protocol (SIP) devices sending/receiving Voice over Internet Protocol (VoIP) communications such as SIP messages. The SBC assigns a unique port to each registering communications device and adds a path header with a single, common SBC port to the SIP register messages. A softswitch responds by adding a route header to identified voice communications. Thereafter, all identified voice communications pass through a single, common SBC port.

Method for tagging SIP contact headers while preserving the contact header format towards softswitches

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Boca Raton, FL, United States of America

Thomas Nagel