System and method of realizing main/standby switching backboard clock

A master-standby switchover and backplane technology, applied in transmission systems, digital transmission systems, data exchange networks, etc., can solve problems such as clock gaps, interruptions, and bit errors, and achieve the effect of eliminating clock gaps and realizing seamless connection
CN105406984AActive Publication Date: 2016-03-16湖州帷幄知识产权运营有限公司
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Patent Information

Authority / Receiving Office
CN · China
Patent Type
Applications(China)
Current Assignee / Owner
湖州帷幄知识产权运营有限公司
Publication Date
2016-03-16

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Abstract

The invention relates to the electronic communication technology field and especially relates to a system of realizing a main / standby switching backboard clock. The system is used for narrowband access local end equipment. The system comprises a first master control card and a second master control card which are arranged on a backboard. One of the first master control card and the second master control card can be switched and selected to output a clock signal to the backboard. The master control card which currently outputs the clock signal to the backboard is taken as a main-use master control card and another master control card is taken as a standby master control card. The main-use master control card generates a first control signal at first setting time before generating an enable control signal so as to close clock signal outputting to the backboard. The first control signal gets to another master control card after transmission time delay. The another master control card generates another enable control signal after a processing process of second processing time so as to make the master control card output the clock signal to the backboard. In the above technical scheme, through using a mode of main / standby switching advance notification, seamless connection of the backboard clock during main / standby switching can be realized.
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Description

technical field

[0001] The invention relates to the technical field of electronic communication, in particular to a system and a method for realizing active / standby switchover of backplane clocks. Background technique

[0002] In the narrowband access central office equipment, such as figure 1 As shown, two main control cards are usually set up, namely main control card A and main control card B, and multiple line cards 2. The two main control cards realize redundant backup, and the multiple line cards realize service transmission. The main control card A or main control card B sends the clock to the line card 2 through the backplane 1. When the clock signal is output by the master main control card, the slave main control card does not output the clock signal. When the master-slave relationship between master control card A and master card B is switched, the original master master card becomes the slave master card, and the clock output to the backplane is turned off, and ...

Claims

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