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Method and apparatus for performing either tone analysis on a local looped-back communications path or utilizing a hybrid reflection based looped-back test to test integrity
Method and apparatus for performing either tone analysis on a local looped-back communications path or utilizing a hybrid reflection based looped-back test to test integrity
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机译:用于在本地环回通信路径上执行音调分析或利用基于混合反射的环回测试来测试完整性的方法和装置
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摘要
In one embodiment, a test tone is placed in an outbound path of a full-duplex transmission system. An echo cancellation capability is disabled, enabling an echo signal of the test tone to pass through the inbound path of the full-duplex transmission system, which echo signal is analyzed to determine the condition of the full-duplex paths. In another embodiment a standard DSP generates DTMF tones which are looped-back and tested by the DSP, under control of a CPU. The DSP is a standard DSP avoiding the need for any hardware/software modification of the DSP to perform the test mode. The tests are performed the local level, i.e. at the subscriber's location, eliminating the need for central office intervention, for example.
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