JPH0787520B2 - Image signal transmitter - Google Patents
Image signal transmitterInfo
- Publication number
- JPH0787520B2 JPH0787520B2 JP60029805A JP2980585A JPH0787520B2 JP H0787520 B2 JPH0787520 B2 JP H0787520B2 JP 60029805 A JP60029805 A JP 60029805A JP 2980585 A JP2980585 A JP 2980585A JP H0787520 B2 JPH0787520 B2 JP H0787520B2
- Authority
- JP
- Japan
- Prior art keywords
- signal
- busy
- line
- transmission
- detection output
- 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.)
- Expired - Fee Related
Links
Landscapes
- Communication Control (AREA)
- Facsimile Transmission Control (AREA)
Description
【発明の詳細な説明】 (技術分野) 本発明は画信号を送信する画信号送信装置に関する。TECHNICAL FIELD The present invention relates to an image signal transmitting apparatus for transmitting an image signal.
(従来技術) 通常、フアクシミリ装置等の画信号送信装置は、電話に
より手動発呼する場合は、相手が通信中であったり、回
線が一杯の時オペレータがビジー音を聞いて通信ができ
ないことを確認していた。(Prior Art) Normally, when transmitting a manual call by telephone, an image signal transmitting device such as a facsimile machine may not communicate when the other party is communicating or the operator hears a busy tone when the line is full. Had confirmed.
ところが、近年時刻指定通信や、ワンタツチキーにより
受話器をオフフツクしないでも自動発呼することが可能
となった。この為オペレータはビジー音の確認ができな
いので、装置が被呼局からの被呼局がフアクシミリ装置
であることを示す被呼局識別信号により判断していた。
被呼局識別信号がかなり長い時間(例えば35秒)たって
も検出できない場合に回線がビジーである事を判断して
いた。However, in recent years, it has become possible to automatically make a call by time-specified communication or by using the one-touch key without turning off the handset. For this reason, the operator cannot confirm the busy tone, and the device determines from the called station by the called station identification signal indicating that the called station is a facsimile device.
It was judged that the line was busy when the called station identification signal could not be detected after a considerably long time (for example, 35 seconds).
又、ダイヤル信号の送出後に回線から返送される応答信
号がビジー音かどうかを変復調回路を使って判断するも
のもあった。Further, there is also one that uses a modulation / demodulation circuit to determine whether or not the response signal returned from the line after the dial signal is transmitted is a busy tone.
しかしながら、従来は、画信号の伝送中に通信相手が回
線を開放してしまっても、所定の画信号の伝送が終了す
るまではそれを検知することができなかった。したがっ
て無駄な画信号の伝送が続行されてしまい、次の伝送動
作を実行するまでに時間がかかってしまうという問題が
あった。However, conventionally, even if the communication partner opens the line during the transmission of the image signal, it cannot be detected until the transmission of the predetermined image signal is completed. Therefore, there is a problem that useless image signal transmission is continued and it takes time to execute the next transmission operation.
(目的) 本発明は上述の従来技術の欠点を解消した画信号伝送装
置の提供を目的としており、その特徴は回線切換手段及
び画伝送手段を制御する制御手段の割込入力端子にビジ
ー音検出手段の検出出力を入力し、画伝送の実行中にあ
ってもビジー音が検出されると電話回線が開放される様
に回線切換手段を制御することにある。(Object) An object of the present invention is to provide an image signal transmission device which solves the above-mentioned drawbacks of the prior art. The feature thereof is that busy signal is detected at the interrupt input terminal of the line switching means and the control means for controlling the image transmission means. The detection output of the means is input, and the line switching means is controlled so that the telephone line is opened when the busy tone is detected even during the image transmission.
(実施例) 以下、図面により本実施例を説明する。(Example) Hereinafter, this example will be described with reference to the drawings.
第1図には本実施例のフアクシミリ装置のブロツク図が
示されている。FIG. 1 shows a block diagram of the facsimile machine of this embodiment.
図において2は電話回線2aを電話器4又はハイブリツド
回路6に切替接続したり、直流ループの保持を行う網制
御装置(以下NCU)、8は原稿を読取り、2値化された
画像信号を出力する読取回路、10はAM−PM−VSB変調
器、12はトーナル信号送出回路、14は加算回路、16は回
線のビジー音を検出するビジー音検出回路、18はトーナ
ル信号検出回路で種々の周波数信号を検出する。In the figure, reference numeral 2 is a network control unit (hereinafter referred to as NCU) that switches and connects the telephone line 2a to the telephone 4 or the hybrid circuit 6 and holds a DC loop, and 8 reads a document and outputs a binarized image signal. A reading circuit, 10 is an AM-PM-VSB modulator, 12 is a tonal signal sending circuit, 14 is an adding circuit, 16 is a busy tone detecting circuit for detecting a busy tone of the line, and 18 is a tonal signal detecting circuit, and various frequencies are provided. Detect the signal.
20はAM−PM−VSB復調器、22は復調データを順次記録紙
上に記録する記録回路、24は全体系を制御する制御回路
で、CPU,ROM,RAM等から構成される。Reference numeral 20 is an AM-PM-VSB demodulator, 22 is a recording circuit for sequentially recording demodulated data on recording paper, and 24 is a control circuit for controlling the entire system, which is composed of a CPU, ROM, RAM and the like.
制御回路24の割込入力端子にはビジー音検出回路16の検
出出力が入力されており、割込がイネーブルの時には常
時ビジー音を監視している。The detection output of the busy sound detection circuit 16 is input to the interrupt input terminal of the control circuit 24, and the busy sound is constantly monitored when the interrupt is enabled.
以下、制御回路24の制御フローチヤート(第2図)を参
照して本実施例のフアクシミリ装置の動作を説明する。
第2図(a)にメインフローチヤートを、第2図(b)
に割込が発生した時のインタラプルルーチンを示してい
る。The operation of the facsimile machine of this embodiment will be described below with reference to the control flow chart (FIG. 2) of the control circuit 24.
The main flow chart is shown in Fig. 2 (a), and Fig. 2 (b).
It shows an interrupt routine when an interrupt occurs.
ステツプS32において電話回線2aをNCU2により電話器4
に接続しておく。又、その他の回路を初期化しておく。
ステツプS34で送信、受信、発呼、被呼等の動作が行わ
れると、ステツプS36でNCU2により電話回線2aをハイブ
リツド回路6に接続すると共に、ビジー音検出回路16か
らの割込を許可する。In step S32, the telephone line 2a is connected to the telephone 4 by the NCU2.
Connected to. Also, other circuits are initialized.
When operations such as transmission, reception, call origination, and call reception are performed in step S34, the telephone line 2a is connected to the hybrid circuit 6 by the NCU 2 and the interruption from the busy tone detection circuit 16 is permitted in step S36.
まず割込が発生しない場合について説明する。First, the case where no interrupt occurs will be described.
ステツプS38では前手順を実行する。前手順は、トーナ
ル信号の送信(信号線24d、信号線24eの制御により行
う)、位相信号の送信(信号線24cの制御により行
う)、トーナル信号の受信(信号線18の入力により行
う)、位相信号の受信(信号線20aの入力により行う)
により行う。The pre-procedure is executed in step S38. The pre-procedure includes transmitting a tonal signal (performing control of the signal lines 24d and 24e), transmitting a phase signal (performing control of the signal line 24c), receiving a tonal signal (performing input of the signal line 18), Phase signal reception (performed by inputting signal line 20a)
By.
ステツプS40では、画伝送を実行している。画伝送は、
画信号の送信(信号線24bの制御により行う)、又は画
信号の受信(信号線24fの制御により行う)により行
う。In step S40, image transmission is executed. Image transmission
It is performed by transmitting an image signal (performed by controlling the signal line 24b) or receiving an image signal (performed by controlling the signal line 24f).
ステツプS42では、後手順を実行している。後手順はト
ーナル信号の送信(信号線24d、信号線24eの制御により
行う)、トーナル信号の受信(信号線18aの入力により
行う)により行う。In step S42, the post procedure is executed. The post-procedure is performed by transmitting a tonal signal (performed by controlling the signal lines 24d and 24e) and receiving a tonal signal (performed by inputting the signal line 18a).
ステツプS44においては電話回線2aを電話機4側に接続
する。すなわち信号線24のaに信号レベル「φ」の信号
を出力する。そしてビジー音検出回路16からの割込入力
をデイスイネーブルしてステツプS46で動作を終了す
る。In step S44, the telephone line 2a is connected to the telephone 4 side. That is, the signal of the signal level "φ" is output to the signal line 24a. Then, the interrupt input from the busy sound detecting circuit 16 is enabled, and the operation is ended in step S46.
第2図(b)は、インタラプト処理を表わしている。FIG. 2B shows the interrupt processing.
ステツプS50においては、ビジー音を確実に検出したか
否かが判断される。すなわち信号線16aが信号レベル
「1」のままであるとステツプS54に進む。一方ビジー
音を検出していない。すなわち、信号線16が信号レベル
「φ」である時はノイズ等によい割込がかかったと判断
し、ステツプS52に進み、インタラプトからメインルー
チンヘリターンする。In step S50, it is judged whether or not the busy sound is surely detected. That is, if the signal line 16a remains at the signal level "1", the process proceeds to step S54. On the other hand, the busy tone is not detected. That is, when the signal line 16 is at the signal level "φ", it is determined that a good interrupt is applied to noise or the like, the process proceeds to step S52, and the interrupt returns to the main routine.
ステツプS54においては、電話回線2aを電話機4側に接
続し、信号線24aに信号レベル「φ」の信号を出力する
と共に回線を開放し、ステツプS46に戻り動作を終了す
る。In step S54, the telephone line 2a is connected to the telephone 4 side, the signal of the signal level "φ" is output to the signal line 24a, the line is opened, and the process returns to step S46 to end the operation.
このように、送信又は受信等の通信動作中に常時ビジー
音を検出しているので、相手機が回線を通信中に断した
場合、或は発呼中に回線がビジーな場合にも速やかに装
置の通信動作が終了せしめることが可能となる。In this way, the busy tone is always detected during communication operations such as transmission or reception, so if the other party disconnects the line during communication, or if the line is busy during calling, promptly The communication operation of the device can be ended.
又、回線を開放する際ビジー音を検出による開放である
事を表示又は記録する様構成してもよい。Further, when the line is opened, a busy sound may be displayed or recorded to indicate that the line has been opened.
(効果) 以上説明した様に、本発明によれば、ハイブリッド手段
により受信信号と送信信号を分離して、ビジー音検出出
力を制御手段の割込入力端子に入力し、前手順信号の送
信前から後手順信号の送信後まで割込を許可することに
より、画信号及び手順信号の送信中に受信側が電話回線
を開放した場合であっても、電話回線を直ちに開放して
速やかに次の動作に移行することが可能になり、かつ、
ビジー音検出出力の割込があるとビジー音検出出力に変
化がないことを確認してから電話回線を開放しているの
で、ノイズによる誤動作を防ぐことが可能になる。(Effect) As described above, according to the present invention, the reception signal and the transmission signal are separated by the hybrid means, the busy sound detection output is input to the interrupt input terminal of the control means, and the pre-procedure signal is not transmitted. Even if the receiving side opens the telephone line during the transmission of the image signal and the procedure signal, the telephone line is immediately opened and the next operation is promptly performed by permitting the interrupt until after the transmission of the post-procedure signal. It becomes possible to move to
If the busy sound detection output is interrupted, the telephone line is opened after confirming that there is no change in the busy sound detection output, so it is possible to prevent malfunction due to noise.
第1図は、本実施例のフアクシミリ装置のブロツク図、
第2図(a),(b)は、第1図制御回路24の制御の流
れ図である。 図において 2はNCU、4は電話機、6はハイブリツド回路、8は読
取回路、10はAM−PM−VSB変調器、12はトーナル信号送
出回路、14は加算回路、16はビジー音検出回路、18はト
ーナル信号検出回路、20はAM−PM−VSB復調器、22は記
録回路、24は制御回路を夫々示す。FIG. 1 is a block diagram of the facsimile machine of this embodiment,
2A and 2B are flow charts of control of the control circuit 24 in FIG. In the figure, 2 is an NCU, 4 is a telephone, 6 is a hybrid circuit, 8 is a reading circuit, 10 is an AM-PM-VSB modulator, 12 is a tonal signal sending circuit, 14 is an adding circuit, 16 is a busy sound detecting circuit, 18 Is a tonal signal detection circuit, 20 is an AM-PM-VSB demodulator, 22 is a recording circuit, and 24 is a control circuit.
Claims (1)
手段と、 画信号及び手順信号を送信する送信手段と、 ビジー音を検出するビジー音検出手段と、 前記回線切換手段により捕捉された電話回線から受信さ
れた信号を前記ビジー音検出手段に出力するとともに、
前記送信手段から送信された信号を前記電話回線に出力
するハイブリッド手段と、 前記回線切換手段及び前記送信手段を制御する制御手段
とを有し、 前記制御手段は、前記ビジー音検出手段のビジー音検出
出力を割込入力端子を介して入力し、前記送信手段によ
る前手順信号の送信前にビジー音検出出力の割込を許可
するとともに、前記送信手段による後手順信号の送信後
にビジー音検出出力の割込を禁止し、前記送信手段によ
り画信号及び手順信号の送信中にビジー音検出出力の割
込みがあるとビジー音検出出力に変化がないことを確認
し、ビジー音検出出力に変化がなければ前記電話回線が
開放される様に割込処理により前記回線切換手段を制御
することを特徴とする画信号送信装置。1. A line switching means for capturing and releasing a telephone line, a transmitting means for transmitting an image signal and a procedure signal, a busy sound detecting means for detecting a busy sound, and a telephone captured by the line switching means. While outputting the signal received from the line to the busy tone detecting means,
It has hybrid means for outputting the signal transmitted from the transmitting means to the telephone line, and control means for controlling the line switching means and the transmitting means, wherein the control means is a busy tone of the busy tone detecting means. The detection output is input via an interrupt input terminal, the busy sound detection output is allowed to be interrupted before the transmission of the pre-procedure signal by the transmission means, and the busy sound detection output is transmitted after the transmission of the post-procedure signal by the transmission means. If the busy signal detection output is interrupted during the transmission of the image signal and the procedure signal by the transmitting means, it is confirmed that the busy signal detection output does not change, and the busy signal detection output must not change. An image signal transmitting device, characterized in that the line switching means is controlled by an interruption process so that the telephone line is opened.
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP60029805A JPH0787520B2 (en) | 1985-02-18 | 1985-02-18 | Image signal transmitter |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP60029805A JPH0787520B2 (en) | 1985-02-18 | 1985-02-18 | Image signal transmitter |
Publications (2)
Publication Number | Publication Date |
---|---|
JPS61189769A JPS61189769A (en) | 1986-08-23 |
JPH0787520B2 true JPH0787520B2 (en) | 1995-09-20 |
Family
ID=12286232
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
JP60029805A Expired - Fee Related JPH0787520B2 (en) | 1985-02-18 | 1985-02-18 | Image signal transmitter |
Country Status (1)
Country | Link |
---|---|
JP (1) | JPH0787520B2 (en) |
Families Citing this family (5)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPH01231562A (en) * | 1988-03-11 | 1989-09-14 | Fujitsu Ltd | Facsimile equipment |
JPH01252051A (en) * | 1988-03-31 | 1989-10-06 | Aiphone Co Ltd | Abnormal off-hook release circuit |
JPH0350953A (en) * | 1989-07-18 | 1991-03-05 | Canon Inc | Telephone exchange |
JPH09186793A (en) * | 1996-10-17 | 1997-07-15 | Hitachi Ltd | Line controller |
JPH09186794A (en) * | 1996-10-17 | 1997-07-15 | Hitachi Ltd | Facsimile equipment |
Citations (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPS5723066B2 (en) * | 1981-02-17 | 1982-05-17 |
Family Cites Families (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPS5723066U (en) * | 1980-07-14 | 1982-02-05 | ||
JPS5978767U (en) * | 1982-11-19 | 1984-05-28 | 日本電信電話株式会社 | fax machine |
-
1985
- 1985-02-18 JP JP60029805A patent/JPH0787520B2/en not_active Expired - Fee Related
Patent Citations (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPS5723066B2 (en) * | 1981-02-17 | 1982-05-17 |
Also Published As
Publication number | Publication date |
---|---|
JPS61189769A (en) | 1986-08-23 |
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Legal Events
Date | Code | Title | Description |
---|---|---|---|
LAPS | Cancellation because of no payment of annual fees |