Nippon Telegraph and Telephone Corporation

Manabu Kubota

Takayoshi Tashiro

Kenta Ito

Haruka Nagoshi

Shun Morishima

Toshinori Hanano

Satoshi Shimazu

Masayoshi Sekiguchi

Tomoaki Yoshida

Kengo Horikoshi

Takashi Yamada

Shunsuke Kanai

Hisao Yoshinaga

A communication apparatus includes a communication unit, a power supply unit, a temperature monitoring unit, and a control unit. The communication unit communicates with an additional apparatus. The power supply unit supplies power to components mounted in the communication apparatus. The temperature monitoring unit monitors a temperature in the communication apparatus to detect presence or absence of a temperature abnormality. In a case where the temperature monitoring unit detects the temperature abnormality, the control unit performs power supply stop processing of stopping the power supply from the power supply unit to at least some of the components. Furthermore, the control unit stops or decreases communication of the communication unit in a case where the temperature monitoring unit detects the temperature abnormality.

Communication apparatus and temperature monitoring method

A communication apparatus includes a plurality of devices, each of the plurality of devices includes a monitoring unit configured to monitor at least one other device to detect an error that has occurred in the other device, and each of the plurality of devices is monitored by at least one other device.

Communication apparatus and error detection method

A fiber module (B) according to the present disclosure includes an input-side optical fiber (), an output-side optical fiber (), a ferrule () in which the input-side optical fiber and the output-side optical fiber are insertable in both ends and a groove () is formed in a direction orthogonal to a longitudinal direction (D) in the middle of the longitudinal direction, a dielectric multilayer film filter () inserted in the groove, and an input-side GI fiber () and an output-side GI fiber () joined by fusion to respective terminal portions of the input-side optical fiber and the output-side optical fiber. The dielectric multilayer film filter is interposed between an end surface () of the input-side GI fiber and an end surface () of the output-side GI fiber in the longitudinal direction.

Fiber module

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Musashino, Japan

Manabu Kubota