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1. 发明专利

DE3513598C2 未知
公开(公告)号：DE3513598C2
公开(公告)日：1987-12-23
申请号：DE3513598
申请日：1985-04-16
申请人： NEUMANN ELEKTRONIK GMBH, 4330 MUELHEIM, DE
发明人： NEUMANN, DIRK, DIPL.-ING., 4330 MUELHEIM, DE
IPC分类号： H04M3/30

2. 发明专利

DE3104551C2 未知
公开(公告)号：DE3104551C2
公开(公告)日：1982-10-21
申请号：DE3104551
申请日：1981-02-10
申请人： NEUMANN ELEKTRONIK GMBH, 4330 MUELHEIM, DE
发明人： NEUMANN, DIRK, DIPL.-ING., 4330 MUELHEIM, DE
IPC分类号： G10L13/08 , G10L1/08 , H04M1/64

3. 发明专利

DE3627025C2 未知
公开(公告)号：DE3627025C2
公开(公告)日：1988-08-18
申请号：DE3627025
申请日：1986-08-09
申请人： NEUMANN ELEKTRONIK GMBH, 4330 MUELHEIM, DE
发明人： NEUMANN, DIRK, DIPL.-ING., 4330 MUELHEIM, DE
IPC分类号： H04M1/67 , H04M1/66

4. 发明专利

DE3507661C2 未知
公开(公告)号：DE3507661C2
公开(公告)日：1987-05-07
申请号：DE3507661
申请日：1985-03-05
申请人： NEUMANN ELEKTRONIK GMBH, 4330 MUELHEIM, DE
发明人： NEUMANN, DIRK, DIPL.-ING., 4330 MUELHEIM, DE
IPC分类号： H04B1/58 , H04B3/03 , H04B3/36 , H04M1/58 , H04M9/08

5. 发明专利

DE3000278C2 未知
公开(公告)号：DE3000278C2
公开(公告)日：1986-05-28
申请号：DE3000278
申请日：1980-01-05
申请人： NEUMANN ELEKTRONIK GMBH, 4330 MUELHEIM, DE
发明人： NEUMANN, DIRK, DIPL.-ING., 4330 MUELHEIM, DE
IPC分类号： H04M1/18 , H04M19/04 , H04M1/00 , H05B41/30

6. 发明专利

DE3047356C2 未知
公开(公告)号：DE3047356C2
公开(公告)日：1983-03-10
申请号：DE3047356
申请日：1980-12-16
申请人： NEUMANN ELEKTRONIK GMBH, 4330 MUELHEIM, DE
发明人： NEUMANN, DIRK, DIPL.-ING., 4330 MUELHEIM, DE
IPC分类号： H04M1/62 , H05K5/00 , H04M9/08

7. 发明专利

DE3104564C2 未知
公开(公告)号：DE3104564C2
公开(公告)日：1987-11-12
申请号：DE3104564
申请日：1981-02-10
申请人： NEUMANN ELEKTRONIK GMBH, 4330 MUELHEIM, DE
发明人： NEUMANN, DIRK, DIPL.-ING., 4330 MUELHEIM, DE
IPC分类号： H04M1/64 , H04M3/53

8. 发明专利

DE3119226C2 未知
公开(公告)号：DE3119226C2
公开(公告)日：1983-04-28
申请号：DE3119226
申请日：1981-05-14
申请人： NEUMANN ELEKTRONIK GMBH, 4330 MUELHEIM, DE
发明人： NEUMANN, DIRK, DIPL.-ING., 4330 MUELHEIM, DE
IPC分类号： H04M1/64 , H04M11/04 , H04M19/08 , G08B25/02 , H04M19/00

9. 发明专利

DE3832619C1 Checkable line termination for a telephone line and method for checking the line termination from the telephone switchboard 未知
公开(公告)号：DE3832619C1
公开(公告)日：1990-01-25
申请号：DE3832619
申请日：1988-09-26
申请人： NEUMANN ELEKTRONIK GMBH, 4330 MUELHEIM, DE
发明人： NEUMANN, DIRK, DIPL.-ING., 4330 MUELHEIM, DE
IPC分类号： H04M3/30
摘要： A checkable line termination for a telephone line, particularly in a plug-in connecting socket and a method for checking the line termination from the telephone switchboard. By pulling the connecting plug, a line termination (1) is connected between the two branches (La, Lb) of the telephone line via the plug-in device (3) of the plug-in connecting socket (2), instead of the telephone set (FSpA). The line termination (1) contains an ohmic resistor of predetermined size which can be connected in parallel with the two branches of the telephone line via a first field-effect transistor. The first field-effect transistor is activated via voltage divider circuits and a second field-effect transistor, in such a manner that the first field-effect transistor is cut off when the line voltage is normal and is driven to conduct when the line voltage is lowered below a predetermined value from the telephone switchboard so that, in this state of the line termination, a resistance measurement can be carried out from the telephone switchboard which shows whether the connecting plug is plugged in or pulled out.

10. 发明专利

DE3705816C2 未知
公开(公告)号：DE3705816C2
公开(公告)日：1988-12-29
申请号：DE3705816
申请日：1987-02-24
申请人： NEUMANN ELEKTRONIK GMBH, 4330 MUELHEIM, DE
发明人： NEUMANN, DIRK, DIPL.-ING., 4330 MUELHEIM, DE
IPC分类号： H04M1/715 , H04M9/00 , H04M1/72 , H04M1/70
摘要： A selector device for a telephone unit for connecting a plurality of telephone stations (FE1, FE2, FE3) to a telephone line (La, Lb). For each telephone station it has one bistable relay, one relay winding being assigned to a setting device (SV1, SV2, SV3) and the other relay winding being assigned to a resetting device (RV1, RV2, RV3). The setting device is in each case disposed in one leg (La) of the telephone line, whereas the resetting device is connected via a relay contact (s1.2, s2.2, s3.2) between the b-terminal and the m-terminal of the telephone station. Relay contacts (s2.3, s3.4, s1.4, s3.3, s1.3, s2.4), which open when a different setting device (SV1, SV2, SV3) is activated, are disposed in the legs of the telephone line which lead to the telephone stations. To prevent the simultaneous connection of two telephone stations, a constant current source (IK1, IK2, IK3) is connected in parallel with each setting device and a common constant current source (IK0) is connected in series with all the setting devices. The constant current of the common constant current source (IK0) is greater than the constant current of one of the parallel-connected constant current sources (IK1, IK2, IK3), but less than the sum of the constant currents of any two of the parallel-connected constant current sources. Bypass relay contacts (s1.1, s2.1, s3.1), which in each case ... when the is/are set ... are connected in parallel with all the setting devices and constant current sources... Original abstract incomplete.

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