With respect to first to 11th DSL subscriber line termination units ( 112 - 1 to 112 - 11 ) each terminating subscriber lines for a plurality of channels on a board, there is provided an auxiliary DSL subscriber line termination unit ( 112 - 12 ) terminating the same number of subscriber lines on a board Upon occurrence of failure corresponding to any of the channels, a redundant control panel ( 114 ) implements switching to a corresponding channel of the auxiliary DSL subscriber line termination unit By this switching, a physical interface number of a packet is changed However, it can be dealt with by conversion to the same logical interface number as before using a mapping table ( 212 ) under the control of a protection control section ( 215 )

Subscriber unit redundant system and subscriber unit redundant method

The invention discloses method for connecting physical wires for differential signal in 1+1 redundant module. Physical wires include from chips on mutual redundant physical layers to wiring on backboard and to chips on physical layers in another module. Using the disclosed method for connecting physical wire can reduce PCB needed by module and number of layer of PCB needed by backboard effectively, and lower difficult of wiring on backboard, as well as reduce part of resources of chips on physical layer of module, and resources of backboard connector.

Physical line connection method for differential signal in redundant module

PROBLEM TO BE SOLVED: To provide a communication device capable of achieving high reliability while maintaining a device configuration and a control method compact and simple. SOLUTION: The communication device includes: a plurality of working units (1-1 to 1-N); and a protection unit (2). The plurality of working units and the protection unit comprise a plurality of working circuit modules (12-1-1 to 12-1-n, 12-2-1 to 12-2-n, ..., 12-N-1 to 12-N-n, 22-1 to 22-n), and a protection circuit module (13-1-1, 13-1-2, 13-2-1, 13-2-2, ..., 13-N-1, 13-N-2, 23-1, 23-2). Common parts 14-1 to 14-N, 24 switch to the protection circuit module preferentially when a failure occurs in any of the plurality of working circuit modules, and a common unit 3 in the device executes switching to the protection unit when the failure cannot be relieved. COPYRIGHT: (C)2010,JPO&INPIT

Communication device and device component combined redundancy method used for the same

A VoIP processing unit (24) mutually converts an analog communication signal from a subscriber terminal (10) supplied via a switching unit (23) and communication data via a network (40). When the connection request from the subscriber terminal (10) is destined to a predetermined number, the VoIP processing unit (24) supplies the analog communication signal via the switching unit (23) to a subscriber exchange (22). When performing maintenance of the VoIP processing unit (24), a switch (23a) is operated to directly connect a subscriber line containing terminal board (21) to the subscriber exchange (22), after which the VoIP processing unit (24) is removed. Thus, it is possible to provide a line switching device and method, and a gateway device contributing to the improvement of the communication quality.

Line switching device and method, and gateway device

PROBLEM TO BE SOLVED: To provide subscriber ports and a subscriber unit switching device and method that can provide uninterruptible services to subscribers. SOLUTION: The subscriber-switching device for an asymmetrical digital subscriber line (ADSL) system includes multiple subscriber units 20 provided with multiple subscriber ports 10, a redundancy subscriber unit 100 among the multiple subscriber units 20, a network unit 30 for transmitting input data given to the multiple subscriber units to the network, a back plane 60 in the shelf provided with a control unit for controlling the subscriber units and the network unit, a rear unit 70 for transmitting the input data from a plurality of subscriber lines on the back plane to the subscriber units, a common line board 80 for connecting the subscriber lines of the rear unit to the redundancy subscriber unit through common lines, and a switching means 90 that switches the subscriber ports of the subscriber units, the redundancy subscriber unit and the common line board to the rear unit.

Subscriber-switching device and subscriber unit switching method of asymmetrical digital subscriber lines system

The present invention includes a subscriber-switching device and method in a system of asymmetrical digital subscriber lines ADSL. The subscriber-switching device includes multiple subscriber units including multiple subscriber ports, respectively; a redundancy subscriber unit including multiple subscriber ports, a network unit for transmitting data inputted from the multiple subscriber units to networks, a rear unit on a back plane of a shelf for transmitting data inputted from at least more than one of the subscriber lines to the subscriber unit, a common line board for connecting the subscriber lines of the rear unit to the redundancy subscriber unit through the common line, a switching means for switching among the subscriber port of the subscriber unit, the redundancy subscriber unit, and the common line board, and a controller for controlling mutual operation flows among the above units and means. Therefore, data inputted from the subscriber line is continuously serviced to the subscribers through the switched redundancy subscriber unit without data interruption. As a result, the reliability of the transmitting device and the quality of the services can be improved enormously.

Chul-Hee Lee

Papers

Subscriber-switching device and subscriber unit switching method of asymmetrical digital subscriber lines system

Subscribers-switching device and method of asymmetrical digital subscriber lines

User's exchange device and method with asymmetrical digital user line