发明名称 |
CONNECTION SYSTEM FOR DIGITAL TELEPHONE SET |
摘要 |
PURPOSE:To realize a simultaneous talking for the tranch-connected digital telephone sets, by providing the means to give the mixture and distribution to the analog signals of the branch-connected telephones and the line control means which gives a control to the catch of the digital subscriber line. CONSTITUTION:The sending speech parallel connection terminal 30 and then receiving speech parallel connection terminal 31 of the analog signal are provided to the transmitter microphone 1 and the telephone receiver 16 each. And furthermore the line control circuit 32 is provided to the line interface INT7 to give a control to the catch and release of the digital subscriber line 8. A connection is secured among the terminals 30 and 31 of the digital telephones A and B each plus the line 8, and then a connection is given between the input terminal 35 of A and the output terminal 37 of B as well as between the terminal 37 of A and the terminal 35 of B each. And a branch connection is given between the two telephones. Then the telephone which actuated the hook switch FS9 first catches the line 8 via the gate 40 and the INT7; and the telephone which actuated the switch FS9 later does not catch the line 8 until the preceding telephone has the release. Accordingly, no confusion is caused among the digital signals on the line 8 and at the same time, thus realizing a simultaneous talking for both telephones A and B. |
申请公布号 |
JPS5637759(A) |
申请公布日期 |
1981.04.11 |
申请号 |
JP19790113783 |
申请日期 |
1979.09.05 |
申请人 |
NIPPON ELECTRIC CO;NIPPON TELEGRAPH & TELEPHONE |
发明人 |
TOMIMORI AKINOBU;AMAMIYA FUJIO |
分类号 |
H04Q3/58;H04B14/04;H04M9/02 |
主分类号 |
H04Q3/58 |
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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