JPH0469946U - - Google Patents
Info
- Publication number
- JPH0469946U JPH0469946U JP11387190U JP11387190U JPH0469946U JP H0469946 U JPH0469946 U JP H0469946U JP 11387190 U JP11387190 U JP 11387190U JP 11387190 U JP11387190 U JP 11387190U JP H0469946 U JPH0469946 U JP H0469946U
- Authority
- JP
- Japan
- Prior art keywords
- detection
- power supply
- telephone line
- hook state
- detecting
- 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 12
- 238000010586 diagram Methods 0.000 description 1
Description
第１図は本考案の一実施例を示す図、第２図は
要部動作を示すフローチヤートである。
１……電話回線接続端子、２……フツクスイツ
チ回路、３……ダイヤル制御部、４……ダイヤル
トーン検出部、５……直流電源検出部、６……ト
ーン／パルス設定部、７……制御回路、８……外
部電源回路、９……リセツト回路。
FIG. 1 is a diagram showing an embodiment of the present invention, and FIG. 2 is a flowchart showing the main operation. DESCRIPTION OF SYMBOLS 1...Telephone line connection terminal, 2...Hook switch circuit, 3...Dial control section, 4...Dial tone detection section, 5...DC power supply detection section, 6...Tone/pulse setting section, 7...Control Circuit, 8... External power supply circuit, 9... Reset circuit.
Claims (1)
源検出手段と、電話回線からの直流電源を検出す
る直流電源検出手段と、前記両検出手段の検出に
基づきオフフツク状態に設定するフツク状態制御
手段と、前記両検出手段の検出に基づくオフフツ
ク状態への設定に応答して電話回線に回線検出用
信号を出力する信号出力手段と、該信号出力手段
からの信号に対する電話回線の変化を検出する変
化検出手段と、該変化検出手段の検出結果に基づ
きトーン／パルスの切換えを行う切換手段とを具
備したことを特徴とする電話装置。 External power supply detection means for detecting connection of an external power supply such as a commercial power supply; DC power supply detection means for detecting DC power from a telephone line; and hook state control means for setting an off-hook state based on detection by both of the detection means. , signal output means for outputting a line detection signal to the telephone line in response to the off-hook state setting based on the detection by both of the detection means; and change detection for detecting a change in the telephone line in response to the signal from the signal output means. and switching means for switching tone/pulse based on the detection result of the change detection means.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP11387190U JPH0469946U (en) | 1990-10-29 | 1990-10-29 |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP11387190U JPH0469946U (en) | 1990-10-29 | 1990-10-29 |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| JPH0469946U true JPH0469946U (en) | 1992-06-22 |
Family
ID=31861495
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP11387190U Pending JPH0469946U (en) | 1990-10-29 | 1990-10-29 |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPH0469946U (en) |
-
1990
- 1990-10-29 JP JP11387190U patent/JPH0469946U/ja active Pending