Huawei Technologies Co., Limited

Zte Corporation

Jianzhang Chen

Xiaoqian Chai

Kepeng Li

Jiangshui He

Hongtao Gao

Xiaoyi Dong

Han Xu

Jianxin Lu

Meidong Zhu

Guiyu Zhao

A zeroing method and zeroing device for an optical time-domain reflectometer (OTDR) are disclosed. The zeroing method includes: before starting the optical time-domain reflectometer, when a laser device is in an off state, sending a zeroing signal; and performing zeroing processing according to the zeroing signal. In the embodiments of the present invention, the feedback zeroing can be performed on a receiving circuit by utilizing the idle time prior to a test or during the test, thus the influence of an offset voltage is reduced, and a problem of operational-amplifier zero drift also can be solved in the meantime, which improves a detectability of the OTDR, and overcomes a disadvantage that a manual zeroing method is not intelligent and a measured waveform introduced in an automatic zeroing method is bad.

Zeroing method and zeroing device for optical time-domain reflectometer

The present invention relates to a method and a system for management of terminal devices. The core of the present invention is as follows: a terminal device monitors and acquires events generated in the terminal device under off-line conditions, and reports the events to a management side, after establishing communication with the management side. The aforementioned management side then performs management of the terminal device. With the present invention, the terminal events can be monitored, and the terminal device can be managed based on the monitored terminal events. Thus, the adverse impact of the terminal events on the terminal device may be prevented and eliminated in a timely fashion. This reduces the probability of equipment errors, and thus improves the service quality of the service provider.

Method and system for management of terminal devices

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Shenzhen, China

Jianzhang Chen