A test method for verifying ssm response rules

Abstract

The present application provides a test method for verifying SSM response rules, the method comprising: the test device sends a synchronous Ethernet signal through the first port; when the device under test receives the synchronous Ethernet signal sent by the test device through the fourth port, press the configured The SSM response rule sends the corresponding synchronous Ethernet signal to the test device through the fourth port and the fifth port, and sends the corresponding framed 2Mb / s external timing signal to the test device through the sixth port; the test device receives the synchronization sent by the device under test When the Ethernet signal and the framing 2Mb / s external timing signal are used, determine whether the received SSM value is the same as the configured SSM value; and record the comparison result; when the test equipment determines that any of the recorded comparison results are different, determine the tested The SSM response rule of the device is incorrect, and the SSM value corresponding to the records with different comparison results is displayed. This method can improve testing efficiency and reduce human errors.

Description

technical field [0001] The invention relates to the technical field of communications, in particular to a test method for verifying SSM response rules. Background technique [0002] A Synchronous Status Message (SSM) is a code used by a synchronization network to indicate a clock quality level. At present, ITU-T stipulates that four bits are used for encoding, and these four bits are Synchronization Status Message Byte (SSMB). [0003] As shown in Table 1, the SSM codes and their usage priorities defined by the ITU-T applicable to my country are used to distinguish information of different clock quality levels. [0004] [0005] Table 1 [0006] In BITS equipment, SSM is transmitted through a certain bit of the first time slot (TS0) of the 2Mb / s clock signal; in SDH transmission network, SSM is transmitted through the lower four bits of the S1 byte in the SDH section overhead In synchronous Ethernet, the SSM is transmitted through a special slow protocol message (Ether...

AI Technical Summary

Problems solved by technology

[0025] The manual testing method has the following disadvantages: the test is carried out based on the tester's understanding of the standard, and the testing method is not uniform

[0026] Corresponding to the 7 requirements to test one by one, it is necessary to set up multiple different test environments. In each test environment, sometimes it is necessary to traverse different SSM quality levels and perform multiple settings on the instrument. The connection is complicated, the settings are cumbersome, time-consuming, and easy go wrong

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