JPH0479568A - Connection line discriminating system for communication equipment - Google Patents

Abstract

PURPOSE:To discriminate a connection line only with a line signal by turning on/off a line voltage with different number of times from every kind of communication line sides at every kind of communication lines, while, discriminating a connected communication channel by the number of times of turning on/off of the line voltage by detecting at a communication equipment side. CONSTITUTION:Facsimile equipment 1 performs communication by directly connecting to an ordinary telephone circuit, and in addition, performs the communication on a mobile telephone circuit, and performs the communication on the telephone circuit via an acoustic coupler device 6. When a line loop current is made flow from an interface device 5 and the acoustic coupler 6 to a facsimile equipment 1 side, a pulse current is made flow by continuing the loop current intermittently for the constant number of times set in advance. Also, the facsimile equipment 1 detects the pulse current, and when no pulse is present thereon, it is judged as the ordinary telephone circuit and when the pulse is present, it is discriminated whether it is a mobile telephone set or the acoustic coupler. Thereby, it is possible to discriminate the connection line only by the line signal.

Description

DETAILED DESCRIPTION OF THE INVENTION [Field of Industrial Application] The present invention relates to a connection line discrimination method for a communication device in which various communication lines are connected to a telephone line connection terminal.

[Prior Art] For example, as seen in Japanese Unexamined Patent Publication No. 64-73968, a normal facsimile machine used on a telephone line is connected to each car phone line via an interface device, A system that allows facsimile transmission has been proposed.

By the way, since a car telephone line is a wireless communication for a mobile body, transmission errors are likely to occur. When performing facsimile communication over a line with many transmission errors, a non-standard transmission control procedure that takes transmission errors into account is often adopted.

For example, in a facsimile machine that is selectively connected to a normal telephone line and a car telephone line, in order to automatically change the transmission control procedure, it is necessary to determine which line the facsimile machine is connected to.

In order to make this determination, one idea is to output an identification signal indicating the line type from the interface device as described above to the facsimile machine.+2. However, a typical facsimile machine is equipped with a modular shank with a general-purpose communication bracket as a connection terminal for the telephone line and external telephone so that the user can easily disconnect the telephone. There are many things.

Normally, each pin of a modular shutter is used only for line signals, and the pin assignments are fixed, making it highly versatile. For this reason, the proposed interface device is also connected by means of a mobile network. .

[Problem to be solved by the invention] However, the facsimile IJ equipment as described above, which indicates the line type], can be used in five modular ways.
If you use pin 1 in the jack to output the signal, connect the signal interface of that module jack or a special device 1'
-It becomes.

As a result, when that interface device is connected to another facsimile device, or when that facsimile device is connected to another interface device, it will not operate correctly and the device will lose its versatility3.In this way, conventionally, When connecting each set of lines to a facsimile machine, there was a problem in that the connected line could not be determined unless a special identification signal other than the line signal was used.

SUMMARY OF THE INVENTION An object of the present invention is to solve the above-mentioned problems and to provide a connection line discrimination method of ζ1 that can perform a 1:1 rule on connection lines using only line signals.

[Means for Solving the Problems] To this end, the present invention provides a means for solving the problems on the side of various communication lines.
A constant line voltage, LT, is applied to the device side via the line connection terminal, and the line voltage is turned on and off a different number of times for each communication line from the line side, while the communication device side turns on and off the line voltage. It detects the number of times the communication line is connected and turns it on and off.

[Operation] This makes it possible to determine the connected line based only on the line signal.

[Embodiments] Embodiments of the present invention will be described in detail below with reference to the accompanying drawings.

FIGS. 1A to 1C show system configuration diagrams of a facsimile communication system according to an embodiment of the present invention.

The figure (n) shows a case where a normal telephone line is used.
It will be connected to the Hiwa stuffing machine.

In the same figure (b), lI! This shows the case where a local telephone line is used. In this case, the mobile phone wireless device;) Dohan I Heseso I-4 is connected via the ink face device 5, and the facsimile device 1 is connected to the interface device 5.

FIG. 2C shows a case where an acoustic coupler is used in the telephone line for communication, and an acoustic coupler 6 is connected to the facsimile machine 1. The main body 61 is the handset and receiver of the telephone 7)
will be interrogated.

FIG. 2 shows a circuit diagram of the facsimile machine 1. As shown in FIG. In FIG. 1, one pin of the modular shank 1a for connecting the telephone line is the common terminal C3 of the switching circuit 1b.
The other pin is connected to the common terminal C7 and the discharge detection circuit]d via the loop current detection circuit 1c.

The contact a□ of the switching circuit 1b is a modular terminal for connecting a telephone.
The contact a2 is connected to one pin of the shutter 1e, and the contact a2 is connected to the other pin and the call detection circuit]d.

The other contact b1 of the switching circuit 1b. b2 is I-Lance 1
f, and the other winding is connected to the facsimile image processing section 1g. The facsimile image processing section 1g performs all the image processing in the facsimile machine, such as image processing, transmission, and recording.

The operation display section Ihl is used by the operator to perform various operations and displays the operating status of the device.

The control unit 1] monitors and controls the entire device, and when it outputs control information to and from the operation display unit 111, it manually outputs detection signals from the loop current detection circuit 1c and the call alarm circuit +d. , the switching circuit Ib9 and the facsimile image processing unit IPIL2 control signals.

FIG. 3 shows a circuit configuration diagram of the interface device 5. As shown in FIG.

In the figure, the wireless device 3 and handset 4 used in this embodiment have an off-hook signal O1 [, option 48
No. O [ ] 5, transmission borrowed 1X, reception - same RX, clan 1
-GND and several other signals are output.

-1- Option signal OP5 is a signal indicating an incoming call.

Of the above-mentioned signals, each line other than the transmission signal TX and reception signal RX is directly connected between the wireless device 3 and the HAF 1-SE:/h 6 .

The reception = 0 and transmission signal TX lines on the HSET 4 side are respectively connected to both ends of one winding of the transformer 5a to the vibrator I. The center terminal of the winding is connected to ground GND.

Both ends of the other windings of the vibrator 1 to the transformer 5a are connected to the human power of the facsimile operation detection/off-hook control circuit 51) and to each pin of the modular shack 5c.

Each pin of the modular jack 5d is connected to the input of the facsimile operation detection/off-hook control circuit 5b and the line voltage/off-hook control circuit 5b.
The output of the pulse generating circuit 5e is connected to both ends of one winding of the hybrid L-lance 5f. Both ends of the other winding are connected to the received signal R of the wireless device 3
X and each line of the transmission signal TX, and the center terminal of the winding is connected to the crank +;G+\1D. The off-hook signal ○11 and the ground GND line are connected to the human power side of the facsimile operation detection/off-hook control circuit 5b.

The facsimile operation detection/off-hook control circuit 5b detects the operating state of the connected facsimile machine, and turns on an off-hook signal to the line device 3 during operation.Line voltage/pulse generation circuit 5e applies a DC voltage equal to the line voltage of the telephone line to the line terminal of the facsimile machine to be connected, and at the same time, at the start of the application, pulse current is passed intermittently.

4th] This is a circuit diagram of the acoustic coupler 6. In the figure, inside the operation section 62, there is a micro 2a.
A speaker 62b and a pushbutton switch 62c are provided, and are connected to the main body 61 side.

In the main body 61, one end of the micro 2a is grounded, and the other end is connected to
1, the other end of the resistor R2 and the output of the amplifier 6]a are connected to the input of the resistor R2 and the output of the amplifier 6],
It is connected to one end of one winding of b. The center terminal of the winding is grounded, and the other end is connected via a resistor R;
One end of the resistor R4 is connected to the input of the amplifier 6]c. The output of the amplifier 6]c and the other end of the resistor Jj' port (4) are connected to the - end of the vibrator 61b, and the other end is grounded.

One end of the other winding of the hybrid I-1 Herance 611) is connected via a capacitor C to one end of the resistor R5 and one pin of the modular jack 6]d.

The other ends of the windings of the vibrator 1 to the transformer 61b are connected to D.
One end of the output of the C/DC converter 6]e and the
The other pin of the shutter 6]d is connected to the other pin of the shutter 6]d. D.C.
The other end of the output of the /DC converter [3]e is connected to one end of the diode-1-D via the pulse generation circuit 61f,
The other end is connected to the other end of the resistor R5.

The memo amplifiers 6]a, 6]c and the DC/DC converter 61e1 are supplied with power from the battery 61.

Further, the two lines of the switch 62c are connected to the pulse generating circuit 6]f and each pin of the modular jack 6]11, respectively.

The DC/DC converter 61e applies a DC voltage equal to the line voltage of the telephone line to the line terminal of a facsimile machine connected to this apparatus.

The pulse generating circuit 61e supplies a pulse current by intermittent current supply at the start of voltage application.

With the following configuration, the facsimile communication system of this embodiment can use three types of communication lines: a normal telephone line, an automatic JIT telephone line, and a telephone line using an acoustic duplexer. can.

Assuming that a normal telephone line is used, the system will be configured as shown in FIG. 1(a). That is,
Connect the 'id telephone line to the modular jack 1a and the telephone 2 to the modular shack using the specified modular plug]
Connect each to C.

During standby when the facsimile machine w1 is not operating, the switching circuit 1b connects contacts a□, +1. connected to the side. This connects the telephone 2 to the telephone line.

When performing facsimile communication, the operator performs predetermined call/receive operations on the telephone 2 to establish a conversation with the other party, and then activates the facsimile device η1 using the operation display section ]ll.

- [During two-legged incoming and outgoing calls, as shown in Figure 5(a), when telephone 2 goes off-hook, a DC loop circuit is formed in telephone 2, and the However, a DC loop current flows through the line. Loop current detection circuit 10
detects this loop current.

During standby, the facsimile machine 1 monitors the loop current as shown in FIG. 6 (N loop of process 101). And if the loop current flows (here, llJ
! 101 Y), the number of times the current is intermittent in a pulse-like manner is counted (process 102). Note that in this case, the loop current is not intermittent, so the tear value is zero.

Next, the facsimile machine 1 monitors the activation operation (j loop of process 103). Here, the fifth dollar l (c)
As shown in k2, when the startup operation is performed (process 1.
03 y), switching circuit II) is connected to contact E'1. +l) Switch 1 on the 7 side. As a result, the transmission signal from the facsimile image processing section is sent to the line via the 1 Herance 1 and the switching circuit 1b, and the received signal from the line is received by the facsimile image processing section 1g via the opposite route. 1, and facsimile communication becomes possible.

At this time, the facsimile machine 1 sends the upper Fiil! The calculated pulse number is identified (process 104). If the number of pulses is zero (“0” in process 104), a predetermined transmission/reception operation is executed as shown in FIG. 5(d) using the preset transmission control procedure for the telephone line. Do (place) 'I!+
05).

In this case, communication is performed using, for example, a transmission control procedure based on the G3 standard recommended by the CCTTT. Further, for example, if the image information has more than a certain number of errors, such as five lines, while receiving an image of one page, the receiving process is interrupted as an error.

When this communication operation is completed, the facsimile machine 1 switches the switching circuit 1b to the contacts fl1. g a Return to side 2. At this time, as shown in FIG. 5(a), (+)), if the 1'hi handset 2 is on-hook, the loop current is turned off and returns to the standby state.

Next Lm, when using a car telephone line, please refer to Figure 1 (
Configure the system as shown in b). That is,
The wireless device 3 and the terminal 1-4 are connected via an interface device 5. Then, the modular connector jack 5d of the interface device 5 is connected to Ia of the facsimile device 1, and the modular shanks 5o and le are connected by predetermined modular connectors with predetermined modular plugs.

When the facsimile machine 1 is in a standby state, the modular shacks 1a and le are connected, so the transmission signal TX and reception signal RX are transmitted between the wireless device 3 and the hunt cellar l-4 via the lances 5a and 5g. Input and output. Thereby, the hand cellar l-4 can be used normally.

When performing facsimile communication, the operator wakes up the facsimile machine 1 after the handset is in a talking state.

When the handset 4 is off-hook as shown in FIG. 7(a), the line voltage/pulse generation circuit 5e applies a voltage equivalent to the voltage applied to the telephone line to the modular jack 5d. output to the side. Furthermore, at the start of this output, the output voltage is turned on and off in a pulsed manner only twice.

As a result, as shown in FIG. 7(b), a constant current 'a flows through the lines of the modular jacks la and le of the facsimile machine 1, and the current is turned on and off in a pulsed manner.

The facsimile machine 1 counts the number of pulses of this current (FIG. 6, process nu ] 02 ).

Then, as shown in FIG. 7 ((+), (d)), when the starting operation is performed (Y in process 103), the switching circuit 1b is switched and connected to the contact b1.l1)2 side. From here,
The transmission signal from the facsimile image processing unit 1g -℃ is l-
Lance 1f, switching circuit 11) and hybridino]: +
- 1 outputted to the wireless device 3 via the lance 5f, and the received signal from the wireless device 3 1, and the opposite loop 1~
facsimile image processing unit] g, and facsimile communication becomes possible.

At this time, the facsimile machine 1 identifies the number of pulses (process 101), and if the number of pulses is "2"("2" in process 1.04), the facsimile machine 1 is set in advance for the automatic I11 telephone line. The transmission control unit 11j (i) executes a predetermined transmission/reception operation (processing 106). In this case, during image reception of one page, if there is an image information error in up to 50 lines, for example, the reception operation continues as is. In this way, the error condition is relaxed, or special transmission control is performed to transmit the image information together with the error correction jL code.

When this communication operation is completed, the facsimile machine 1 returns the switching circuit 1b to the contact a□la2 side. As a result, the seventh
As shown in Figures (+) and (d), the loop current is turned off.

Next, when communicating over a normal telephone line using an acoustic coupler, the system is configured as shown in FIG. 1(C). That is, the modular jacks 61d and 18 of the acoustic coupler 6 are connected by a predetermined cord with a modular plug.
modular shutter 611] and 1e.

When performing facsimile communication, the operator 1 puts the telephone 7 into a conversation state with the other party. Then, handset 7
a to the operation unit 62, and activate the facsimile machine 1 while pressing the pushbutton switch 62c.

DC/DC converter 61. e outputs a constant DC voltage. When the pushbutton switch 62c is pressed down as shown in FIG.
Remains on. As a result, the modular jack Ia of the facsimile machine 1, as shown in FIG.
A pulse current flows through the line Ie.

The facsimile machine increases the number of pulses of this current to H' (FIG. 6, process 102).

Then, as shown in FIGS. 8(C) and 8(d), when the starting operation is performed (Y in process 103), the switching circuit II) is switched to the contact b,]). As a result, the transmission signal from the facsimile image processing unit 1g is: ]・Lance 1
f, switching circuit 1b, hybrid I lance fill)
a-,' and the amplifier 61 (through the speaker 621)
is output from. Further, the received signal is received by the facsimile image processing unit 1g from the micro 2a via the amplifier 61a and the loop 1 opposite to the above, thereby making facsimile communication possible.

At this time, the facsimile machine performs processing 104) to identify the number of pulses, and if the number of pulses is "3", processing 104).
04 "3"), a predetermined transmission/reception operation is executed according to the transmission control procedure set in advance for the acoustic coupler (process 10).
7). In this case, for example, data transmission is set to a constant low speed for communication.

When this communication operation is completed, the facsimile machine 1 switches the switching circuit 1b to contact a4. + fl Return to 2 side and return to standby state.

As described above, the facsimile device 1 of this embodiment not only communicates by being directly connected to a normal telephone line, but also communicates via a car telephone line via the interface device 5, and via a telephone line via the acoustic cover device 6. I try to say things in common.

When a line loop current is passed from the interface device 5 or the acoustic coupler 6 to the facsimile device Wl side, the loop current is intermittent a predetermined number of times and a pulse current is passed. The facsimile device 1 detects the pulse current, and if there are no pulses, it determines that it is a normal telephone line, and if there are pulses, it determines whether it is a car phone or an acoustic coupler based on the number of pulses. I have to.

From this point of view, the facsimile machine will be able to determine the connection line based only on the line signal. This eliminates the need for special wire connections, interfaces, and connectors, and increases the versatility of the interface.

Further, the intermittent state of the loop current is detected by the loop current detection circuit 1c, and the external part of this circuit is also used for detecting the hook state of the electronic printing machine. This simplifies the device circuit and reduces device cost.

In addition, in the second embodiment, an automatic JI7 telephone device and an acoustic coupler are used in addition to a normal telephone FF7 line. It is obvious that the same method can be applied to lines as well. Furthermore, it goes without saying that the present invention can be similarly applied not only to facsimile machines but also to various data transmission devices.

[Effects of the Invention] As described above, according to the present invention, a constant line voltage is applied from the various communication lines to the device side via the revised line connection terminal, and the line voltage is applied to each of the various communication lines from the line side. Turn the line voltage on and off one different number of times? ), the communication device side
Since the connected communication line is determined based on the number of on/off times, the connected line can be determined based on the line signal alone.

[Brief explanation of drawings]

1(a) to (c) are system configuration diagrams of a facsimile communication system according to an embodiment of the present invention when various lines are used, FIG. 2 is a circuit configuration diagram of a facsimile machine, and FIG. 3 is a diagram of an interface device. Circuit configuration U! 1. Figure 4 is the circuit configuration diagram of the acoustic coupler device, and Figure 5 is when using the revised line! ! I
Time chart 1-1 shows the operation of the facsimile machine. Figure 6 shows the operation flowchart 1-1 of the facsimile machine. Figure 7 shows the operation when using a car telephone line. Time chart showing the operation when using the device
It is. Facsimile machine, Ia, le, 5c, 5cl, 6]d
, 61. h Mojikora Jack, 5e Line voltage/
Pulse generation circuit, 1b switching circuit, le5 loop current detection circuit l'1', 8, 1f-1-lance, 1g...
Facsimile image processing section, 1j1 operation display section, 1j...
Control unit, 2...Telephone, 3...Wireless device, 4. Handset, 5 Interface device, 5a,! if, 61b
=Hybrid]・Lance, 5b Facsimile operation detection/off-hook control circuit, 6・Acoustic cover, 61・Main body, 6]a, 61c Amplifier, 61e・DC/D
C converter, 6], f Pulse generation circuit, 6] 4 battery, 62 Operation unit, 62I□tomicrophone, 62b・
・Speaker, 62c, 7j (tongue switch).

Claims (2)

[Claims] (1) In a connection line determination method for a communication device in which various communication lines are connected to a telephone line connection terminal, a line voltage application is applied in which a constant line voltage is applied from the communication line side to the device side via the telephone line connection terminal. means, a pulse generating means disposed on the communication line side for turning on and off the line voltage a different number of times for each type of communication line, and a pulse detection means disposed on the communication device side for detecting whether the line voltage is turned on or off. A connection line discrimination method for a communication device, comprising: a line discrimination means for discriminating the type of communication line connected based on the number of times the detected line voltage is turned on and off. (2) The communication device includes an external telephone connection terminal, a connection circuit that outputs a voltage applied to the telephone line connection terminal to the telephone connection terminal, and a loop current that detects the presence or absence of current flowing through the connection circuit. 2. A connection line determination method for a communication device according to claim 1, further comprising a loop current detection means for determining whether the line voltage is on or off and whether the external telephone is hooked.