| 摘要 |
PURPOSE: A device for testing an SLIC(Subscriber Line Interface Circuit) IC and an SLAC(Subscriber Line Audio Processing Circuit) IC of a full electronic exchange subscriber board is provided to enable a tester to confirm whether the first SLIC ICs and the first/second SLAC ICs are normal by a measured AC voltage and a DC, thereby easily testing the SLIC ICs and the SLAC ICs. CONSTITUTION: The first test device(110) generates a 2-line signal, and measures an AC voltage and a DC of the signal. The first SLIC IC(120) converts the 2-line signal into a 4-line signal, or converts an external 4-line signal into a 2-line signal, and outputs the 2-line signal. The first SLAC IC(130) converts the 4-line signal into a PCM signal, or converts an external PCM signal into a 4-line signal, and outputs the 4-line signal. The second SLAC IC(140) converts the PCM signal into a 4-line signal, or converts an external 4-line signal into a PCM signal, and outputs the PCM signal. The second SLIC IC(150) converts the 4-line signal into a 2-line signal, or converts an external 2-line signal into a 4-line signal, and outputs the 4-line signal. The second test device(160) measures an AC voltage and a DC of the 2-line signal, or generates a 2-line signal to output the signal. A control IC(170) inputs data for initializing, and initializes the first SLAC IC(130) and the second SLAC IC(140).
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