JPH0346265U - - Google Patents
Info
- Publication number
- JPH0346265U JPH0346265U JP10644689U JP10644689U JPH0346265U JP H0346265 U JPH0346265 U JP H0346265U JP 10644689 U JP10644689 U JP 10644689U JP 10644689 U JP10644689 U JP 10644689U JP H0346265 U JPH0346265 U JP H0346265U
- Authority
- JP
- Japan
- Prior art keywords
- hook
- telephone line
- telephone
- switch
- detection means
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Pending
Links
- 238000001514 detection method Methods 0.000 claims description 5
- 230000005236 sound signal Effects 0.000 claims 2
- 238000010586 diagram Methods 0.000 description 1
Description
第１図はこの考案の一実施例の通話拡声装置と
一般の電話機との接続を示す回路図である。
１……電話回線、２……ウオールコンセント、
３……通話拡声装置、４……電話機、１４……リ
ンガ回路、１５……オフフツク検出回路、１６…
…整流回路、１７ａ，１７ｂ……カツトオフスイ
ツチ、１８……音声増幅器、１９……定電圧回路
、２０……スピーカ。
FIG. 1 is a circuit diagram showing the connection between a telephone loudspeaker according to an embodiment of this invention and a general telephone set. 1...Telephone line, 2...Wall outlet,
3... Call loudspeaker, 4... Telephone, 14... Ringer circuit, 15... Off-hook detection circuit, 16...
... Rectifier circuit, 17a, 17b ... Cutoff switch, 18 ... Audio amplifier, 19 ... Constant voltage circuit, 20 ... Speaker.
Claims (1)
電圧回路と、 上記定電圧回路から電力を供給され、上記電話
回線から入力された音声信号を増幅する増幅手段
と、 上記増幅手段によつて増幅された音声信号をう
けて音声を出力する音声出力手段と、 上記定電圧回路を上記電話回線に接続したり、
上記電話回線から切り離したりするためのスイツ
チと、 上記電話回線からの呼出信号を検出する呼出信
号検出手段と、 上記電話機のオフフツクを検出するオフフツク
検出手段と、 上記呼出信号検出手段が呼出信号を検出した場
合に上記スイツチを開く一方、上記オフフツク検
出手段がオフフツクを検出した場合に上記スイツ
チを閉じるスイツチ制御手段とを備えたことを特
徴とする通話拡声装置。[Claims for Utility Model Registration] A constant voltage circuit connected in parallel with a telephone set to a telephone line; and an amplifying means that is supplied with power from the constant voltage circuit and amplifies an audio signal input from the telephone line. , audio output means for receiving the audio signal amplified by the amplifying means and outputting audio; and connecting the constant voltage circuit to the telephone line;
a switch for disconnecting from the telephone line; a ringing signal detection means for detecting a ringing signal from the telephone line; an off-hook detection means for detecting off-hook of the telephone; and the ringing signal detection means detects a ringing signal. 1. A telephone loudspeaker comprising: a switch control means that opens the switch when the off-hook occurs, and closes the switch when the off-hook detection means detects an off-hook.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP10644689U JPH0346265U (en) | 1989-09-11 | 1989-09-11 |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP10644689U JPH0346265U (en) | 1989-09-11 | 1989-09-11 |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| JPH0346265U true JPH0346265U (en) | 1991-04-30 |
Family
ID=31655175
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP10644689U Pending JPH0346265U (en) | 1989-09-11 | 1989-09-11 |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPH0346265U (en) |
-
1989
- 1989-09-11 JP JP10644689U patent/JPH0346265U/ja active Pending
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