Fujitsu Corporation

Masaru Kameda

Takashi Suzuki

Yukio Suda

Junichi Ishiwatari

Nobuyuki Nemoto

Hideo Sunaga

Shigeyuki Kobayashi

Toshiaki Ookubo

Masaki Kubo

Shuniti Nakayama

An alarm detection apparatus includes a plurality of alarm detectors detecting and/or cancelling alarms for identical and different error rates. The plurality of alarm detectors are grouped into a major detector unit made up of alarm detectors which detect major error rates, and a minor detector unit made up of alarm detectors which detect minor error rates. The major detector unit and the minor detector unit output detection outputs corresponding to specified detection rates thereof. A predetermined alarm detector corresponding to a part of the minor detector unit has a specified detection rate overlapping a specified detection rate of the major detector unit being controlled, so that a detection function or a detection output of the predetermined alarm detector is disabled.

Alarm detection apparatus

A time-slot interchanger includes first and second time switches and a space switch installed between the first and second time switches. The first time switch includes a first part for supplying data, which is produced by adding a blank region to input data supplied to the first time switch, in n systems (n is an integer), in parallel to the space switch. And the second time switch includes a second part for supplying output data, which is produced by removing the blank region from data received in the n systems and in parallel from the space switch.

Time-slot interchanger

Growing community of inventors

Yokohama, Japan

Masaru Kameda