发明名称 |
Method and circuit arrangement for audible indication of dial pulses with a built-in loudspeaker device |
摘要 |
For the audible indication of dial pulses in telephone sets via a built-in loudspeaker device, the voltage peaks occurring during pulse dialling on the subscriber line are evaluated in such a way that they can be forwarded via a glow gap to the loudspeaker input and thus be rendered audible.
|
申请公布号 |
DE3103341(A1) |
申请公布日期 |
1982.08.26 |
申请号 |
DE19813103341 |
申请日期 |
1981.01.31 |
申请人 |
FRIEDRICH MERK-TELEFONBAU GMBH |
发明人 |
GEIGER,KLAUS,ING. |
分类号 |
H04M1/56;(IPC1-7):H04M1/56 |
主分类号 |
H04M1/56 |
代理机构 |
|
代理人 |
|
主权项 |
|
地址 |
|