Line switching apparatus and method
作者： Katsuhiro Kakizawa
DOI:
关键词: Line switching 、 ALARM 、 Line (text file) 、 Electrical engineering 、 Electronic engineering 、 Signal 、 Computer science 、 State (computer science)
摘要: A line switching apparatus includes receiving circuitry for a line-connection request signal from an extension, discriminating determining whether connection is possible to the when received circuitry, sending busy extension determines that impossible, detecting monitoring status of during by and in connectable state, alarm informing fact has been detected be state circuitry.
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