JPH0182541U - - Google Patents
Info
- Publication number
- JPH0182541U JPH0182541U JP1987177664U JP17766487U JPH0182541U JP H0182541 U JPH0182541 U JP H0182541U JP 1987177664 U JP1987177664 U JP 1987177664U JP 17766487 U JP17766487 U JP 17766487U JP H0182541 U JPH0182541 U JP H0182541U
- Authority
- JP
- Japan
- Prior art keywords
- telephone line
- telephone
- circuit
- magnetic force
- detection 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
- 238000001514 detection method Methods 0.000 claims description 6
- 238000006243 chemical reaction Methods 0.000 claims 2
- 238000010586 diagram Methods 0.000 description 1
Description
第１図は本考案の通話状態検出回路を備えた第
１電話機の一実施例を示す構成図、第２図は、第
１図で示した第１電話機を別の第２電話機と共に
並列に一つの電話回線に接続させた構成図である
。
主な図番の説明、３…電話回線、６…スピーチ
ネツトワーク回路、８…通話状態検出回路、１２
…第２コイル、１３…検出回路、１５…制御回路
。
FIG. 1 is a block diagram showing an embodiment of a first telephone equipped with a call state detection circuit of the present invention, and FIG. 2 shows a configuration in which the first telephone shown in FIG. 1 is connected in parallel with another second telephone. FIG. Explanation of main drawing numbers, 3... Telephone line, 6... Speech network circuit, 8 ... Call status detection circuit, 12
...Second coil, 13...Detection circuit, 15...Control circuit.
Claims (1)
作を行なう電話機のスピーチネツトワーク回路に
対し、並列に接続し、高抵抗値を有して該電話回
線を介して流れ込んで来る直流電流を磁力又は光
に変換する電流変動変換手段と、該電流変動変換
手段で変換された磁力又は光を受け、該磁力又は
、光の強弱に対応した出力信号を出す検出回路と
、該検出回路よりの出力信号を受け、斯かる状態
の電話回線の使用状況を判断する識別回路とより
なり、前記スピーチネツトワー回路に対し、オフ
フツク状態時には十分動作電流の供給が行なえる
ようにすると共に、オンフツク状態時には、電話
回線に対しオンフツク抵抗条件を満足できるよう
にしたことを特徴とする通話状態検出回路。 It is connected in parallel to the speech network circuit of a telephone that is connected to a telephone line and performs a telephone call operation via the telephone line, and has a high resistance value and directs the direct current flowing through the telephone line by magnetic force or A current fluctuation conversion means for converting into light, a detection circuit that receives the magnetic force or light converted by the current fluctuation conversion means and outputs an output signal corresponding to the strength of the magnetic force or light, and an output signal from the detection circuit. In response to this, an identification circuit is provided to determine the usage status of the telephone line in such a state, and to supply sufficient operating current to the speech network circuit in the off-hook state, and to supply sufficient operating current to the speech network circuit in the on-hook state. A call status detection circuit is characterized in that it is capable of satisfying on-hook resistance conditions for a line.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP1987177664U JPH0182541U (en) | 1987-11-20 | 1987-11-20 |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP1987177664U JPH0182541U (en) | 1987-11-20 | 1987-11-20 |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| JPH0182541U true JPH0182541U (en) | 1989-06-01 |
Family
ID=31469321
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP1987177664U Pending JPH0182541U (en) | 1987-11-20 | 1987-11-20 |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPH0182541U (en) |
-
1987
- 1987-11-20 JP JP1987177664U patent/JPH0182541U/ja active Pending