Fujitsu Corporation

Toshiaki Asai

Hiroshi Kato

Yoshiyuki Sato

Mitsuaki Hayashi

Kazuo Fujita

Takaharu Izuno

Kazuya Nishida

Masaki Hiromori

Yuji Kamura

Masato Hashizume

Katsuhiko Ikeda

Megumi Shibata

Yoshinari Oshio

Seiji Matsuzaki

Kazutaka Nakata

A transmission apparatus with flexible structure for introducing external cables that controls signal transmission efficiently. A cable connector for introducing a cable from the outside is fixed on a sub-printed circuit board. A main printed circuit board has a guide rail along which the sub-printed circuit board can be inserted reversely to change the direction from which the cable is introduced at the time of the sub-printed circuit board being housed. An enclosure has ducts for bunching cables. Transmission units are mounted in the enclosure.

Transmission apparatus

A transmission device and an integrated circuit improved in quality and reliability of digital transmission control. A memory stores an input signal, write address generating means generates a write address for writing in the memory, and read address generating means generates a read address for reading from the memory. Phase state monitoring means monitors a transition from a steady phase state in which writing/reading in/from the memory is normally performed or from a startup state to a coincident phase state in which address values of the write and read addresses coincide with each other or to an unstable phase state in which a phase fluctuation margin is one-sided. When the coincident phase state or the unstable phase state is detected, reset signal output means outputs a reset signal to the write and read address generating means such that the phase relation between the write and read addresses is brought to an optimum phase relation.

Transmission device and integrated circuit

A time slot interchange apparatus for a maintenance dedicated line of a signal transmission system, capable of utilizing effectively the orderwire line having only one line and of avoiding a crosstalk, data error or the like, has switching units for on/off switching the line at both sides of each of the signal transmission stations, and a control circuit which controls the on/off switching of the switching units, so that, at calling in, the opposite line is made to be off and, at calling out, the line opposite to the calling station is made to be off.

Time slot interchange apparatus for maintenance dedicated line of signal

Growing community of inventors

Osaka, Japan

Toshiaki Asai