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Detection method and quasi-synchronization digital hierarchy apparatus

A detection method and technology of equipment, applied in the field of communication, can solve the problems of packet loss and link disconnection of PDH equipment

Inactive Publication Date: 2014-05-28
HUAWEI TECH CO LTD
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  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0005] The invention provides a detection method and quasi-synchronous digital system PDH equipment to solve the problem in the prior art that the PDH equipment loses packets or even disconnects its link caused by the difference in the ground potential of the PDH equipment at both ends of the coaxial cable

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  • Detection method and quasi-synchronization digital hierarchy apparatus

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Embodiment Construction

[0022]The technical solutions of the present invention will be described in further detail below with reference to the accompanying drawings and embodiments.

[0023] The invention discloses a detection method and quasi-synchronous digital system PDH equipment. When the interface of the PDH equipment is abnormal in communication, it can automatically detect whether the ground potential of the PDH equipment is consistent with the ground potential of the opposite end equipment; if the ground potential of the PDH equipment and If the ground potential of the peer device is consistent, the PDH device is automatically controlled to be grounded; if the ground potential of the PDH device is inconsistent with the ground potential of the peer device, the PDH device is automatically controlled not to be grounded and an alarm is issued, thereby realizing the PDH coaxial The cable grounding is automatically controlled, and when the ground potential of the PDH equipment is inconsistent with ...

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Abstract

The embodiments of the invention relate to a detection method and a quasi-synchronization digital hierarchy apparatus. The method comprises: when there is communication abnormity between a first device and a second device, detecting whether the earth potential of the first device is consistent with the earth potential of the second device, the second device being connected with the first device through a coaxial cable; and if the earth potential of the first device is not consistent with the earth potential of the second device, controlling the first device to be not grounded so as to realize automatic control of coaxial cable grounding, and controlling the surface layer of the coaxial cable to be connected with only one earth phase of one device when the earth potential of the first device is not consistent with the earth potential of the second device so that no currents flow through the surface layer of the coaxial cable, and no currents flow through a transformer in the apparatus, thus magnetic saturation does not occur in the transformer, and accordingly the problem of packet loss or link break does not occur in the apparatus.

Description

technical field [0001] The invention relates to the technical field of communication, in particular to a detection method and quasi-synchronous digital system equipment. Background technique [0002] With the development of communication technology, Pseudo-synchronous Digital Hierarchy (English: Pseudo-synchronous Digital Hierarchy, abbreviation: PDH) interface, as a mature interface, is widely used in the communication market. Among them, the PDH unbalanced mode uses a coaxial cable to transmit signals, and the line impedance is 75 ohms. Because the surface layer of the coaxial cable is more susceptible to interference, if the surface layer of the coaxial cable is not grounded, there is no way for the interference signal to discharge, resulting in abnormal communication. Therefore, in order to improve the anti-interference ability, it is necessary to ground the surface layer of the coaxial cable. [0003] Generally, the method of grounding the surface layer of the coaxial...

Claims

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Application Information

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IPC IPC(8): H04L12/26
Inventor 李东杜永王苓宇程程宋震煜
Owner HUAWEI TECH CO LTD
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