Method for selecting clock source and data communication equipment

A data communication and clock technology, applied in the field of communication, can solve problems such as the inability of DTE equipment to communicate normally, and achieve the effect of improving reliability and compatibility

Inactive Publication Date: 2010-05-19
ZTE CORP
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0009] The present invention is proposed in view of the problem that DCE equipment is often unable to communicate normally with some non-standard DTE equipment. For this reas

Method used

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  • Method for selecting clock source and data communication equipment
  • Method for selecting clock source and data communication equipment
  • Method for selecting clock source and data communication equipment

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Embodiment Construction

[0029] Considering that DCE equipment often cannot communicate normally with some irregular DTE equipment, the present invention provides a method for selecting a clock source and a data communication DCE equipment for communication between DCE equipment and DTE equipment. The method includes: In the case that the DCE device and the DTE device cannot communicate normally, the DCE device performs clock switching on the sending clock and / or the receiving clock.

[0030] Hereinafter, the present invention will be described in detail with reference to the drawings and examples. It should be noted that, in the case of no conflict, the embodiments in the present application and the features in the embodiments can be combined with each other.

[0031] method embodiment

[0032] According to an embodiment of the present invention, a method for selecting a clock source is provided.

[0033] figure 2 is a flowchart of a method for selecting a clock source according to an embodiment ...

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Abstract

The invention discloses a method for selecting clock source and a data communication equipment. The method is applied to communication between the data communication equipment (DCE) and the data terminal equipment (DTE), wherein, when DCE and DTE can not communicate normally, DCE carries out clock switchover on the transmitting clock and/or the receiving clock. The invention can improve reliability and compatibility of DCE.

Description

technical field [0001] The present invention relates to the communication field, in particular to a method for selecting a clock source and a data communication device. Background technique [0002] The synchronous serial port has been widely used in network communication due to its simple and reliable transmission characteristics. It also supports different physical electrical standards (such as V.24, V.35, X.21, RS449, RS530, etc.), various standards The difference between them is that data signals, clock signals and control signals adopt single-ended or differential transmission forms, and different electrical standards correspond to different connection cable types (such as DB25, DB37, etc.). [0003] The synchronous serial port is divided into two working modes: Data Communication Equipment (DCE for short) and Data Terminal Equipment (DTE for short). In a sense, it is divided according to the clock source. DCE is The active side of the clock provides the sending and re...

Claims

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Application Information

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IPC IPC(8): H04L7/00
CPCH04L7/0083
Inventor 李朝晖
Owner ZTE CORP
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