JP2773749B2 - Facsimile machine - Google Patents
Facsimile machineInfo
- Publication number
- JP2773749B2 JP2773749B2 JP63285845A JP28584588A JP2773749B2 JP 2773749 B2 JP2773749 B2 JP 2773749B2 JP 63285845 A JP63285845 A JP 63285845A JP 28584588 A JP28584588 A JP 28584588A JP 2773749 B2 JP2773749 B2 JP 2773749B2
- Authority
- JP
- Japan
- Prior art keywords
- communication
- signal
- control unit
- digital
- modem
- 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 - Lifetime
Links
Landscapes
- Facsimiles In General (AREA)
- Facsimile Transmission Control (AREA)
- Communication Control (AREA)
Description
この発明は、ディジタル回線に接続するファクシミリ
装置であって、詳しくはCCITT勧告のG3規格に準拠した
ファクシミリ装置との交信を可能にするG4規格に準拠し
たファクシミリ装置に関するものである。The present invention relates to a facsimile apparatus connected to a digital line, and more particularly, to a facsimile apparatus conforming to the G4 standard which enables communication with a facsimile apparatus conforming to the G3 standard of CCITT recommendation.
第３図は従来のCCITT勧告のG3,G4規格に準拠したファ
クシミリ装置を示すブロック接続図であり、図におい
て、１はG4,G3のそれぞれの通信を制御する通信制御
部、２はG3モデムを制御するモデム制御部、３はG3モデ
ム、４は加入電話回線の網制御部、５は加入電話回線、
６はG4通信用のディジタル回線に対する網制御部、７は
ディジタル回線である。また、８は点線でかこんだモデ
ム・網制御回路である。 次に動作について説明する。まず、送信時において、
通信制御部１で生成されたG3通信の送信信号はモデム制
御部２を通り、G3モデム３によって変調され、網制御部
４を経由して加入電話回線５に送出される。これに対
し、G3受信の場合は、この逆の経由を通し、相手からの
G3通信の送信信号を通信制御部１に受信し、機構部やプ
リンタなどを制御する。一方、G4通信の場合は、送信信
号はディジタル信号のまま、網制御部６を通り、ディジ
タル回線７を通じて相手に送信され、受信の場合は、こ
の逆の経路を通って相手からの送信信号を通信制御部１
にて受信し、必要な制御を行う。FIG. 3 is a block diagram showing a conventional facsimile apparatus conforming to the CCITT-recommended G3 and G4 standards. In the figure, reference numeral 1 denotes a communication control unit for controlling G4 and G3 communications, and 2 denotes a G3 modem. Modem control unit to control, 3 is G3 modem, 4 is network control unit of subscribed telephone line, 5 is subscribed telephone line,
Reference numeral 6 denotes a network control unit for a digital line for G4 communication, and reference numeral 7 denotes a digital line. Reference numeral 8 denotes a modem / network control circuit surrounded by a dotted line. Next, the operation will be described. First, at the time of transmission,
The transmission signal of the G3 communication generated by the communication control unit 1 passes through the modem control unit 2, is modulated by the G3 modem 3, and is transmitted to the subscriber telephone line 5 via the network control unit 4. On the other hand, in the case of G3 reception, the opposite
The transmission signal of the G3 communication is received by the communication control unit 1, and the mechanism unit and the printer are controlled. On the other hand, in the case of the G4 communication, the transmission signal is transmitted as a digital signal to the other party through the network control unit 6 and the digital circuit 7, and in the case of the reception, the transmission signal from the other party is transmitted through the reverse route. Communication control unit 1
And performs necessary control.
従来のファクシミリ装置は以上のように構成されてい
るので、G3通信のために加入電話回線５をディジタル回
線７とは別に接続しなければならず、網制御部４も別途
必要で、通信回線の使用料金を２回線分支払わなければ
ならないなどの問題点があった。なお、かかる従来のフ
ァクシミリ装置が、NEC技報 Vol.40 No.2/1987 P29〜
33に記載されている。 この発明は上記のような問題点を解消するためになさ
れたもので、G3通信のモデム信号等をコーデックによっ
てディジタル信号に変換できるとともに、１回線のディ
ジタル回線を使用して、G4およびG3両方の通信ができる
ファクシミリ装置を得ることを目的とする。Since the conventional facsimile apparatus is configured as described above, the subscriber telephone line 5 must be connected separately from the digital line 7 for G3 communication, and the network control unit 4 is also required separately. There were problems such as the need to pay the usage fee for two lines. Note that such a conventional facsimile machine is described in NEC Technical Report Vol.40 No.2 / 1987 P29-
33. SUMMARY OF THE INVENTION The present invention has been made to solve the above-described problems, and it is possible to convert G3 communication modem signals and the like into digital signals by using a codec, and to use both a G4 and a G3 using a single digital line. An object of the present invention is to obtain a facsimile apparatus capable of performing communication.
この発明に係るファクシミリ装置は、G3通信のG3モデ
ムからの出力信号およびG3モデムへの入力信号を、それ
ぞれコーデックによりディジタル信号およびアナログ信
号に変換して、ディジタル回線に入出力できるようにし
たものである。A facsimile apparatus according to the present invention converts an output signal from a G3 modem for G3 communication and an input signal to the G3 modem into a digital signal and an analog signal by a codec, respectively, so that the signal can be input to and output from a digital line. is there.
この発明におけるコーデックは、G3通信のモデム出力
信号をパルス符号変調法則に従って、ディジタル信号に
変換し、また、受信時は、パルス符号変調されたディジ
タル信号をアナログ信号に変換して、モデム入力信号を
生成するように動作する。The codec according to the present invention converts a modem output signal of G3 communication into a digital signal in accordance with the pulse code modulation rule, and converts a pulse code modulated digital signal into an analog signal upon reception to convert the modem input signal. Operate to generate.
以下、この発明の一実施例を図について説明する。第
１図において、１はCCITT勧告のG4,G3規格に準拠するそ
れぞれの通信を制御する通信制御部、２はG3モデムを制
御するモデム制御部、３はG3モデム、６はディジタル回
線７に対する網制御部、７はディジタル回線、８は点線
でかこんだモデム・網制御回路、９はG3モデムの出力信
号（アナログ信号）をパルス符号変調（ディジタル化）
し、一方、ディジタル回線７上のディジタル信号をアナ
ログ信号に変換してG3モデム３に入力するコーデックで
ある。 第２図は網制御部６の一実施例を示し、10はG4,G3の
それぞれのディジタル信号を切り換えるG4/G3切換回
路、11は回線インターフェース回路、12は網との接続，
切断を行う呼接続制御回路である。 次に動作について説明する。まず、送信時において、
通信制御部１で生成されたG3通信の送信信号は、モデム
制御部２を通り、G3モデム３によって変調されてコーデ
ック９に入る。コーデック９はアナログ信号である送信
信号をパルス符号変調し、ディジタル信号に変換する。
変換されたディジタル信号は網制御部６へ送られる。網
制御部６では、第２図に示すようにG3入出力端子10aか
らG4/G3切換回路10を通り、回線インターフェース回路1
1を経由してディジタル回線７へ送出される。 また、受信の場合は、この逆の経路を通って、コーデ
ック９によってディジタル信号からアナログ信号に変換
され、G3モデム３へ入り、通信制御部１でこれを受け
て、機構部やプリンタなどを制御する。このとき、G3,G
4通信の一方から他方への切り換えは、制御入力端12aへ
の制御信号の入力により呼接続制御回路12からG4/G3切
換信号を出力させることによって行われ、このときのG4
通信は、上記のG3通信の場合と同じようにしてG4入力端
子10bを通じて行われる。 なお、上記実施例ではコーデック９のディジタル出力
信号を網制御部６に送り、G4/G3切換回路10で切り換え
るように構成したが、ISDN回線のように、２つの情報チ
ャネルを持った回線に対しては、同時にG4,G3の各信号
を入出力できるので、G4/G3切換回路10を設けなくても
よい。An embodiment of the present invention will be described below with reference to the drawings. In FIG. 1, reference numeral 1 denotes a communication control unit for controlling respective communications conforming to the CCITT-recommended G4 and G3 standards, 2 a modem control unit for controlling a G3 modem, 3 a G3 modem, and 6 a network for a digital line 7. A control unit, 7 is a digital line, 8 is a modem / network control circuit surrounded by a dotted line, 9 is pulse code modulation (digitization) of an output signal (analog signal) of the G3 modem.
On the other hand, it is a codec that converts a digital signal on the digital line 7 into an analog signal and inputs the analog signal to the G3 modem 3. FIG. 2 shows an embodiment of the network control unit 6, wherein 10 is a G4 / G3 switching circuit for switching digital signals of G4 and G3, 11 is a line interface circuit, 12 is a connection to a network,
This is a call connection control circuit for disconnecting. Next, the operation will be described. First, at the time of transmission,
The G3 communication transmission signal generated by the communication control unit 1 passes through the modem control unit 2, is modulated by the G3 modem 3, and enters the codec 9. The codec 9 performs pulse code modulation on a transmission signal, which is an analog signal, and converts the signal into a digital signal.
The converted digital signal is sent to the network control unit 6. In the network controller 6, as shown in FIG. 2, the line interface circuit 1 passes through the G4 / G3 switching circuit 10 from the G3 input / output terminal 10a.
It is sent to the digital line 7 via 1. In the case of reception, the digital signal is converted into an analog signal by the codec 9 through the reverse path, enters the G3 modem 3 and is received by the communication control unit 1 to control the mechanism unit and the printer. I do. At this time, G3, G
4 Switching from one communication to the other is performed by outputting a G4 / G3 switching signal from the call connection control circuit 12 by inputting a control signal to the control input terminal 12a.
Communication is performed through the G4 input terminal 10b in the same manner as in the above-described G3 communication. In the above embodiment, the digital output signal of the codec 9 is sent to the network control unit 6 and switched by the G4 / G3 switching circuit 10. However, for a line having two information channels such as an ISDN line, In addition, since the G4 and G3 signals can be input and output at the same time, the G4 / G3 switching circuit 10 may not be provided.
以上のように、この発明によれば、G3モデムにより変
調されたG3通信に係る送信用のアナログ信号をディジタ
ル信号に変換し、そのディジタル信号をディジタル回線
を介して伝送する一方、ディジタル回線を介して伝送さ
れてきたG3通信に係る受信用のディジタル信号をアナロ
グ信号に変換してG3モデムに供給するように構成したの
で、ディジタル回線と別個に、加入電話回線に加入しな
くてもG4通信に限らず、G3通信が行えるようになり、回
線使用料を安価に抑えることができる効果がある。As described above, according to the present invention, an analog signal for transmission related to G3 communication modulated by a G3 modem is converted into a digital signal, and the digital signal is transmitted via a digital line, while the digital signal is transmitted via a digital line. It is configured to convert the received digital signal for G3 communication transmitted to the G3 modem into an analog signal and supply it to the G3 modem. Not limited to this, G3 communication can be performed, and there is an effect that the line usage fee can be reduced at a low cost.
第１図はこの発明の一実施例によるファクシミリ装置を
示すブロック接続図、第２図は第１図の網制御部の詳細
を示すブロック接続図、第３図は従来のファクシミリ装
置を示すブロック接続図である。 １は通信制御部、３はG3モデム、６は網制御部、７はデ
ィジタル回線、９はコーデック。 なお、図中、同一符号は同一、又は相当部分を示す。FIG. 1 is a block diagram showing a facsimile apparatus according to an embodiment of the present invention, FIG. 2 is a block diagram showing details of a network control unit in FIG. 1, and FIG. 3 is a block diagram showing a conventional facsimile apparatus. FIG. 1 is a communication control unit, 3 is a G3 modem, 6 is a network control unit, 7 is a digital line, and 9 is a codec. In the drawings, the same reference numerals indicate the same or corresponding parts.
───────────────────────────────────────────────────── フロントページの続き (58)調査した分野(Int.Cl.6，ＤＢ名) H04N 1/00 H04N 1/32 H04L 13/00 H04L 29/06──────────────────────────────────────────────────続 き Continued on the front page (58) Field surveyed (Int.Cl. 6 , DB name) H04N 1/00 H04N 1/32 H04L 13/00 H04L 29/06
Claims (1)
ともに、G3通信及びG4通信の受信信号に基づいてプリン
タを制御する通信制御部と、上記通信制御部により生成
されたG3通信の送信信号を送信用のアナログ信号に変調
するとともに、G3通信に係る受信用のアナログ信号をG3
通信の受信信号に復調して上記通信制御部に供給するG3
モデムと、上記G3モデムにより変調されたG3通信に係る
送信用のアナログ信号をディジタル信号に変換するとと
もに、G3通信に係る受信用のディジタル信号をアナログ
信号に変換して上記G3モデムに供給するＡ−D/D−Ａ変
換器と、上記通信制御部により生成されたG4通信の送信
信号をディジタル回線を介して伝送するとともに、その
ディジタル回線を介して伝送されてきたG4通信の受信信
号を上記通信制御部に供給する一方、上記Ａ−D/D−Ａ
変換器により変換されたG3通信に係る送信用のディジタ
ル信号を上記ディジタル回線を介して伝送するととも
に、そのディジタル回線を介して伝送されてきたG3通信
に係る受信用のディジタル信号を上記Ａ−D/D−Ａ変換
器に供給する網制御部とを備えたファクシミリ装置。1. A communication control unit for generating transmission signals of G3 communication and G4 communication and controlling a printer based on reception signals of G3 communication and G4 communication, and transmitting a G3 communication generated by the communication control unit Modulate the signal into an analog signal for transmission, and convert the analog signal for reception related to G3 communication to G3
G3 which is demodulated into a communication reception signal and supplied to the communication control unit
A modem, which converts an analog signal for transmission related to G3 communication modulated by the G3 modem into a digital signal, and converts a digital signal for reception related to G3 communication into an analog signal and supplies the analog signal to the G3 modem. A D / DA converter and a G4 communication transmission signal generated by the communication control unit are transmitted through a digital line, and the G4 communication reception signal transmitted through the digital line is transmitted through the digital line. A / D / D-A is supplied to the communication control unit.
The transmission digital signal related to the G3 communication converted by the converter is transmitted through the digital line, and the reception digital signal related to the G3 communication transmitted through the digital line is transmitted to the A-D A facsimile machine comprising a network controller for supplying the data to a / DA converter.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP63285845A JP2773749B2 (en) | 1988-11-14 | 1988-11-14 | Facsimile machine |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP63285845A JP2773749B2 (en) | 1988-11-14 | 1988-11-14 | Facsimile machine |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPH02132961A JPH02132961A (en) | 1990-05-22 |
| JP2773749B2 true JP2773749B2 (en) | 1998-07-09 |
Family
ID=17696822
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP63285845A Expired - Lifetime JP2773749B2 (en) | 1988-11-14 | 1988-11-14 | Facsimile machine |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JP2773749B2 (en) |
Family Cites Families (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS62204655A (en) * | 1986-03-05 | 1987-09-09 | Mitsubishi Electric Corp | Facsimile communication system |
| JPS63146558A (en) * | 1986-12-09 | 1988-06-18 | Hitachi Ltd | Facsimile communication system |
-
1988
- 1988-11-14 JP JP63285845A patent/JP2773749B2/en not_active Expired - Lifetime
Also Published As
| Publication number | Publication date |
|---|---|
| JPH02132961A (en) | 1990-05-22 |
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