JPH02123158U - - Google Patents
Info
- Publication number
- JPH02123158U JPH02123158U JP3195189U JP3195189U JPH02123158U JP H02123158 U JPH02123158 U JP H02123158U JP 3195189 U JP3195189 U JP 3195189U JP 3195189 U JP3195189 U JP 3195189U JP H02123158 U JPH02123158 U JP H02123158U
- Authority
- JP
- Japan
- Prior art keywords
- line
- turned
- switching element
- circuit
- switch circuit
- 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
- 230000003213 activating effect Effects 0.000 claims 1
- 238000010586 diagram Methods 0.000 description 1
Description
第１図は本考案に係る電話機の電気回路図であ
る。
２０……ハンドセツト、２１……スピーカ、２
２……マイクロホン、Ｓ１−１，Ｓ１−２……リ
レースイツチ、ＲＬ１−１，ＲＬ１−２……リレ
ーコイル、Ｓ２−１，Ｓ２−２……フツクスイツ
チ、ＰＣ１……ホトカプラ、ＩＣ１……スピーチ
ネツトワーク回路、ＩＣ６……スピーカホン回路
、Ｄ１……整流回路、Ｑ１〜Ｑ５……トランジス
タ、ＦＦ１……フリツプフロツプ、ＩＣ５，ＩＣ
７，ＩＣ８……インバータ、＋Ｂ……電源。
FIG. 1 is an electrical circuit diagram of a telephone according to the present invention. 20...Handset, 21...Speaker, 2
2... Microphone, S1-1, S1-2... Relay switch, RL1-1, RL1-2... Relay coil, S2-1, S2-2... Hook switch, PC1... Photocoupler, IC1... Speech net Work circuit, IC6... Speakerphone circuit, D1... Rectifier circuit, Q1-Q5... Transistor, FF1... Flip-flop, IC5, IC
7, IC8...Inverter, +B...Power supply.
Claims (1)
スピーカ及びマイクロホンを備えスピーカホン回
路を能動化させることによつてスピーカホンで内
線通話ができる電話機であつて、 内線と局線とを切換えるスイツチ回路であつて
、しかも通常状態では内線側に切換えられている
、そのようなスイツチ回路と、 スイツチ回路とスピーチネツトワーク回路との
間の送受話信号線上に介在され、回線通話／遮断
用スイツチング素子と、 内線の極性の反転により内線の呼出し及び内線
通話終了を検出する手段と、 前記検出手段によつて内線からの呼出しが検出
されると、スピーカホン回路を能動化させると共
に前記スイツチング素子をＯＮさせて回線通話状
態とし、前記検出手段によつて内線通話終了が検
出されると、スピーカホン回路を不能動化させる
と共にスイツチング素子をＯＦＦさせて回線遮断
状態とする手段と、 ハンドセツトの操作によつてスイツチング素子
がＯＮとなつたときにスイツチ回路を局線側に切
換え、ハンドセツトの操作によつてスイツチング
素子がＯＦＦになつたときにスイツチ回路を内線
側に切換える手段と、 を備えたことを特徴とする電話機。[Scope of claim for utility model registration] The handset allows telephone calls to be made over a central office line, and
A telephone equipped with a speaker and a microphone that enables extension calls by activating the speakerphone circuit, and a switch circuit that switches between an extension line and a central office line, and which is switched to the extension side under normal conditions. such a switch circuit, which is interposed on the transmitting/receiving signal line between the switch circuit and the speech network circuit, and a switching element for line call/cutoff; means for detecting termination; when the detecting means detects a call from the extension, the speakerphone circuit is activated and the switching element is turned on to set the line to a talking state; When the end of a call is detected, the speakerphone circuit is disabled and the switching element is turned OFF to cut off the line, and when the switching element is turned ON by the operation of the handset, the switch circuit is turned off. A telephone set comprising means for switching the switch circuit to the extension side when the switching element is turned OFF by operating the handset.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP3195189U JPH02123158U (en) | 1989-03-20 | 1989-03-20 |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP3195189U JPH02123158U (en) | 1989-03-20 | 1989-03-20 |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| JPH02123158U true JPH02123158U (en) | 1990-10-09 |
Family
ID=31258195
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP3195189U Pending JPH02123158U (en) | 1989-03-20 | 1989-03-20 |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPH02123158U (en) |
Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS62225093A (en) * | 1986-03-27 | 1987-10-03 | Toshiba Corp | Key telephone equipment |
| JPS63304757A (en) * | 1987-06-05 | 1988-12-13 | Aihon Kk | Nurse call terminal equipment with telephone function |
-
1989
- 1989-03-20 JP JP3195189U patent/JPH02123158U/ja active Pending
Patent Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS62225093A (en) * | 1986-03-27 | 1987-10-03 | Toshiba Corp | Key telephone equipment |
| JPS63304757A (en) * | 1987-06-05 | 1988-12-13 | Aihon Kk | Nurse call terminal equipment with telephone function |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| JPH02123158U (en) | ||
| JPS6314559A (en) | Calling system for private telephone | |
| JPH0186353U (en) | ||
| JPS60114055A (en) | Hands free telephone set | |
| JPH03107849U (en) | ||
| JPH01151654U (en) | ||
| JPH02143858U (en) | ||
| JPS6441560A (en) | Line switching device | |
| JPH0288367U (en) | ||
| JPH0223181U (en) | ||
| JPH03109461U (en) | ||
| JPS63174756U (en) | ||
| JPH0273852U (en) | ||
| JPH0174658U (en) | ||
| JPS6335388U (en) | ||
| JPS6175649U (en) | ||
| JPH02116155U (en) | ||
| JPS61195056A (en) | Call equipment | |
| JPH0464840U (en) | ||
| JPH0419848U (en) | ||
| JPH0427655U (en) | ||
| JPH0228163U (en) | ||
| JPH0370440U (en) | ||
| JPH0410445U (en) | ||
| JPH01227562A (en) | System for notifying cancellation of holding |