Abstract: A method for a system including a plurality of encoders each for receiving a first signal and encoding to generate a respective second signal for sending to a respective subscriber, comprising receiving, in each encoder, the first signal from a first source, while testing a signal path between a second source and the encoders, the first source on a first assembly, the second source on a second assembly, and each encoder on a respective third assembly, while each encoder is receiving the first signal from the first source, receiving, in each encoder, a third signal from the second source, generating, from each encoder, a fourth signal based on the third signal, the fourth signal being a redundancy signal and receiving and examining the fourth signal at the second source and subsequently receiving the first signal from the second source.

Abstract: Interactive response systems (1) of call centers for giving users access to information comprise means (11, 31) for receiving activation signals via audio or video or audio/video calls from the users and means (12, 32) for transmitting menu signals to the users and means (13, 21, 33) for receiving selection signals from the users are provided with means (22, 34) for transmitting video signals to the users for providing video to the user. This video may have entertaining, explaining, supporting and/or commercial functions and makes the interactive response systems more-sided and user friendly. The users either use two different devices (4, 5) or use one device (6) for exchanging audio and for receiving video. The interactive response systems (1) further comprise means (14, 35) for receiving link signals that provide direct or indirect links from the interactive response systems (1) to the devices (5) or to video or audio/video calls with the devices (6).

Abstract: Disclosed are systems and methods for transferring data between servers and subscribers. A central office employs DSL circuit cards. Each DSL circuit card encodes a digital signal using a discreet multitone technology (DMT) scheme, and sends an encoded signal on a subscriber line. A disclosed architecture allows the functions of a faulty DSL circuit card to be assumed by another card, without substantial disruption of subscriber service. Further, the architecture allows the faulty DSL to be physically replaced, with minimal disruption of subscriber service. Another aspect of the architecture allows for the testing of subscriber lines.

Abstract: Disclosed are systems and methods for transferring data between servers and subscribers. A central office employs DSL circuit cards. Each DSL circuit card encodes a digital signal using a discrete multitone technology (DMT) scheme, and sends an encoded signal on a subscriber line. A disclosed architecture allows the functions of a faulty DSL circuit card to be assumed by another card, without substantial disruption of subscriber service. Further, the architecture allows the faulty DSL to be physically replaced, with minimal disruption of subscriber service. Another aspect of the architecture allows for the testing of subscriber lines.

Abstract: Disclosed is a system and method for enhancing reliability in a communication system.

Abstract: A system and method for enhancing reliability in a communication system. In the system and method, redundant signal paths are continuously tested to determine if any faults are present while the operating signal paths are in use. If any faults are present in the redundant signal paths, they can be addressed while the operating circuits are still in use. This minimizes the chance that a switch from an operating signal path to a redundant signal path because of a fault in the operating circuit will result in downtime.