发明名称 |
Communication network interface testing system |
摘要 |
Data is sent over a digital communication network in a message frame which includes a header, a data field and an end delimiter. An analyzer for such a network evaluates the response of network interface devices to test message frames. Included in the analyzer is a mechanism for creating a test message frame which allows the user to define a number of pad-idle symbols, a sequence of symbols for a start delimiter, a series of symbols for the data field and a set of symbols for the end delimiter. The use defined test message frame may include invalid symbols to test the error response of the interface device. A transmitter is provided for repeatedly sending the test message frame to the network interface device with a given number of silence symbols inserted between each repetition. The analyzer has a section for receiving message frames back from the network interface device and sequentially comparing the symbols of the test message frame to those of the received message frame. A count is maintained of the number of received message frames which do not coincide with the test message frame.
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申请公布号 |
US5289474(A) |
申请公布日期 |
1994.02.22 |
申请号 |
US19880150935 |
申请日期 |
1988.02.01 |
申请人 |
ALLEN-BRADLEY COMPANY, INC. |
发明人 |
PURCELL, JOSEPH D.;GRAHAM, BRUCE |
分类号 |
H04L12/26;(IPC1-7):H04L1/24 |
主分类号 |
H04L12/26 |
代理机构 |
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代理人 |
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主权项 |
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地址 |
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