发明名称 |
Telephone exchange system. |
摘要 |
A telephone exchange system accommodates a plurality of central office lines and a plurality of telephones and records a telephonic communication in a recording area shared by the plurality of telephones. When predetermined conditions are satisfied, the recording is played back or transferred. The shared recording area can be utilized effectively by erasing a recording after it has been transferred, and by detecting the presence of a voice during a telephonic communication and starting and stopping the recording operation based upon the results of detection. The time at which a recording has been made can be comprehended in the form of a voice when the recording is played back. <IMAGE>
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申请公布号 |
EP0444536(A2) |
申请公布日期 |
1991.09.04 |
申请号 |
EP19910102563 |
申请日期 |
1991.02.21 |
申请人 |
CANON KABUSHIKI KAISHA |
发明人 |
SAKURAI, SHIGEKI;TANIGAWA, YOSHIHIRO;OHUCHI, MASATOMO;SUZUKI, SHOJI;KAKIZAWA, KATSUHIRO;OHTSUKA, KUNIAKI |
分类号 |
H04M3/42;H04M3/487;H04M3/533;H04M3/537 |
主分类号 |
H04M3/42 |
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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