JPH0375663U - - Google Patents
Info
- Publication number
- JPH0375663U JPH0375663U JP13544289U JP13544289U JPH0375663U JP H0375663 U JPH0375663 U JP H0375663U JP 13544289 U JP13544289 U JP 13544289U JP 13544289 U JP13544289 U JP 13544289U JP H0375663 U JPH0375663 U JP H0375663U
- Authority
- JP
- Japan
- Prior art keywords
- telephone line
- public telephone
- terminal
- hook
- changeover switch
- 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 3
- 238000010586 diagram Methods 0.000 description 3
Landscapes
- Facsimile Transmission Control (AREA)
- Meter Arrangements (AREA)
Description
第１図は本考案に係る接続装置の一実施例を示
した回路図、第２図は課金パルスの波形を例示し
た図、第３図は課金パルスの整流波形を示した図
である。
１…極性反転検出回路、２…課金パルス除去回
路、３…フアクシミリ、４…フリツプフロツプ、
５…料金計算回路、Ｌ１，Ｌ２…公衆電話回線、
ＲＹ…リレー。
FIG. 1 is a circuit diagram showing an embodiment of a connection device according to the present invention, FIG. 2 is a diagram illustrating the waveform of a charging pulse, and FIG. 3 is a diagram showing a rectified waveform of the charging pulse. 1...Polarity reversal detection circuit, 2...Charging pulse removal circuit, 3...Facsimile, 4...Flip-flop,
5...Charge calculation circuit, L1, L2...Public telephone line,
RY...Relay.
Claims (1)
極性反転検出手段と、 端末がオンフツクしたことを検出するオンフツ
ク検出手段と、 課金パルスを除去する課金パルス除去手段と、 常時は上記端末を上記公衆電話回線に接続させ
、切り替え作動時に上記端末を上記課金パルス除
去手段を介して上記公衆電話回線に接続する切り
替えスイツチ手段と、 上記極性の反転が検出されてから上記オンフツ
クが検出されるまでの間、上記切り換えスイツチ
手段を切り換え作動させるスイツチ制御手段と、 を備えることを特徴とする公衆電話回線用端末接
続装置。[Scope of Claim for Utility Model Registration] Polarity reversal detection means for detecting that the polarity of a public telephone line has been reversed; on-hook detection means for detecting on-hook of a terminal; charging pulse removal means for removing charging pulses; changeover switch means that normally connects the terminal to the public telephone line and connects the terminal to the public telephone line via the charge pulse removal means when switching is activated; and when the polarity reversal is detected, the on-hook A terminal connection device for a public telephone line, comprising: switch control means that switches and operates the changeover switch means until the changeover switch means is detected.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP13544289U JPH0375663U (en) | 1989-11-22 | 1989-11-22 |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP13544289U JPH0375663U (en) | 1989-11-22 | 1989-11-22 |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| JPH0375663U true JPH0375663U (en) | 1991-07-30 |
Family
ID=31682710
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP13544289U Pending JPH0375663U (en) | 1989-11-22 | 1989-11-22 |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPH0375663U (en) |
-
1989
- 1989-11-22 JP JP13544289U patent/JPH0375663U/ja active Pending