发明名称 |
Private branch exchange apparatus |
摘要 |
In a private branch exchange apparatus having a plurality of extension ports, each extension port capable of connecting a push button telephone and a general standard type telephone in parallel, when a call occurs at one extension port where the parallel connection has been done, a ring sound can be produced at the push button or standard type telephone selectively. An additional dialling provides the selection between the push button and the standard type telephone. A memory may specify either of the push button or standard type telephone to be ringed. A call between the push button telephone and the standard type telephone can be provided in accordance with the additional dialing or data stored in a memory.
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申请公布号 |
US5655012(A) |
申请公布日期 |
1997.08.05 |
申请号 |
US19950510051 |
申请日期 |
1995.08.01 |
申请人 |
MATSUSHITA ELECTRIC INDUSTRIAL CO., LTD. |
发明人 |
TSUCHIDA, KOUSUKE;MITSUO, SADAKA |
分类号 |
H04M3/42;H04M9/00;H04Q3/58;(IPC1-7):H04M3/02 |
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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