A Circuit for Redundant Switching of Standard Digital Clock System
A technology of digital clock and redundant switching, applied in the field of communication, can solve the problems of communication interruption, inflexible configuration, influence of multiplexer equipment, etc.
Active Publication Date: 2021-04-20
ZHUHAI GAOLING INFORMATION TECH COLTD
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Problems solved by technology
[0003] Existing equipment usually uses one of the above three clock sources as the system clock source, and the configuration is not flexible enough
When the clock source of the device fails, usually the communication will be interrupted, and all the multiplexer devices connected in series will be affected
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[0023] The following will clearly and completely describe the technical solutions in the embodiments of the present invention with reference to the accompanying drawings in the embodiments of the present invention. Obviously, the described embodiments are only some, not all, embodiments of the present invention. Based on the embodiments of the present invention, all other embodiments obtained by persons of ordinary skill in the art without making creative efforts belong to the protection scope of the present invention.
[0024] see figure 1 , which is a schematic diagram of a redundant switching circuit of a standard digital clock system of the present invention. As shown in the figure, the redundant switching circuit of the standard digital clock system includes a main control board 1 and at least one main link board (2). Link board 1 to main link board n. The redundant switching circuit of the standard digital clock system further outputs the clock to at least one service ...
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The invention discloses a redundant switching circuit of a standard digital clock system, comprising: a main control board with at least one kind of system clock and sending the at least one kind of system clock; and at least one main link board electrically connected to the The main control board extracts the at least one system clock from the connection link, and generates a clock signal according to the at least one system clock, wherein the main control board sends the clock signal; select a clock source as the highest priority clock source, and the clock signal of the clock source is a system clock; when the clock source fails and is lost, the next clock source is automatically selected; and when the clock source returns to normal, it automatically switches back to the highest priority the clock source. In this way, in the mode of serial connection through the multiplexer, all the devices connected in series will not fail to work normally due to the failure of the main device.
Description
technical field [0001] The invention relates to the technical field of communication, in particular to a redundant switching circuit of a standard digital clock system. Background technique [0002] In the communication network, the time synchronization network is an indispensable part, and different services have different requirements for time synchronization. Precise clock synchronization is one of the important technologies in the field of time and frequency synchronization control. [0003] Existing equipment usually uses one of the above three clock sources as the system clock source, and the configuration is not flexible enough. When the clock source of the device fails, usually the communication will be interrupted, and all the multiplexer devices connected in series will be affected. For example: when the clock of multiplexer A is abnormal, neither multiplexer B nor multiplexer C can work normally; when the clock of multiplexer A is normal, if the input clock of m...
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IPC IPC(8): H04J3/06H04L12/24
CPCH04J3/0641H04L41/0663
Inventor 董晓坚隋丽春王宏涛
Owner ZHUHAI GAOLING INFORMATION TECH COLTD