Fujitsu Corporation

Eiji Shimose

Kazuo Tanaka

Tsuyoshi Ueshima

Seiji Kitayama

Hiroyuki Matsumoto

Shigeki Takahashi

An information processing apparatus includes active units and a standby unit. In the active units and the standby unit, CPUs and DIMMs are divided into a plurality of logical partitions, which are controlled to be diagnosed respectively by diagnosing units. A scheduling unit periodically diagnoses the CPUs and the DIMMs of the standby unit in each of the partitions in turn. If a fault occurs on the active units side, a switching controlling unit controls a partition not being diagnosed in the standby unit to be embedded in an active unit system of the information processing apparatus. The scheduling unit instructs a diagnosis with a smaller number of diagnosis items as a diagnosis performed at reboot after the standby unit is embedded.

Apparatus, method, and program configured to embed a standby unit based on an abnormality of an active unit

A first group of asynchronous clock converters effect the conversion between a DNE clock and an RDT clock to which DS-0 data and signalling data are synchronized, for the data items which are transferred between a cross-connector and a DNE. A second group of asynchronous clock converters effect the conversion between a CPE clock and the RDT clock to which DS-0 data and signalling data are synchronized, for the data items which are transferred between the cross-connector and a CPE. As a result, cross-connect processes based on the single RDT clock are realized, and loop timings are guaranteed for the DNE and the CPE.

Subscriber-line transmission apparatus

A high-speed signal input to and output from a high-speed optical interface part connected to an optical fiber transmission line is switched to different lines such that the switching is conducted by cross connect parts on an arbitrary basis. The high-speed signal is separated so as to obtain the low-speed signal. The low-speed signal output from the cross connect parts is separated so as to obtain the subscriber signal by signal terminal parts. Call connections are conducted for each subscriber by a time slot interchange part, whereupon a subscriber interface part performs analog-to-digital and digital-to-analog conversion so as to serve as an interface for a subscriber.

Digital loop carrier apparatus for large volume digital signal

A subscriber digital transmission system has a central office terminal and a remote terminal coupled to the central office terminal by a digital line, the remote terminal accommodating a plurality of subscribers. The system includes a communication unit for transmitting a multiple signal via the digital line between the central office terminal and the remote terminal, information being multiplexed in a plurality of time slots in the multiple signal, and a multiplexer for multiplexing information for the subscribers and performance information in accordance with a time-division multiprocessing so that the performance information is assigned to a predetermined time slot of the multiple signal to be transmitted by the communication unit.

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Kawasaki, Japan

Eiji Shimose