发明名称 |
Communications apparatus |
摘要 |
A communication unit connectable in parallel with other communication equipment to a two-wire telephone line communicates through the telephone line and a detector detects a voltage across the two-wire telephone line. A command unit commands communication by the communication unit and a controller controls the communication by the communication unit according to the detection by the detector and the command by the command unit.
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申请公布号 |
US5414764(A) |
申请公布日期 |
1995.05.09 |
申请号 |
US19940227583 |
申请日期 |
1994.04.14 |
申请人 |
CANON KABUSHIKI KAISHA |
发明人 |
WATANABE, TSUNEHIRO;TERAJIMA, HISAO;NISHII, TERUYUKI |
分类号 |
H04M1/82;(IPC1-7):H04M1/65 |
主分类号 |
H04M1/82 |
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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