JPS6394761A - Communication equipment - Google Patents

Abstract

PURPOSE:To simplify the constitution by isolating completely a call means at a terminal equipment side from a control section of a main body through isolator and reading input information by both the call means and the control means thereby incorporating the call means. CONSTITUTION:In case of a call using a handset 14, when the handset 14 is hooked off, hook switches 15a, 15b are closed and a DC loop is closed. In this case, when power to a facsimile is supplied, the hook-off is recognized by a main control section 17 with an output of a polarity detection circuit 11b and read of telephone number input information from a key pad 21 is applied through a single line bundle 51. Then the main control section 17 gives a call command to a sub control circuit 18. If no power is supplied to a facsimile equipment due to power failure, since a relay 22 is connected to the key pad 21 at the point of time when the DC loop is turned on, a tone/pulse dialer 16 reads the telephone number input information from the key pad 21 directly through signal line bundle 52 to make a call.

Description

DETAILED DESCRIPTION OF THE INVENTION Field of Industrial Application This invention relates to a communication device, such as a facsimile device, which is connected to a telephone line and used! h-, regarding improvement of the adapter part.

Conventional technology The communication adapter part of a conventional facsimile machine is
Generally, the configuration was as shown in Figure 3.

In FIG. 3, 1 is a line terminal connected to a telephone line;
2 is a rectifier circuit that rectifies the polarity of the line, and 3 is a loop control circuit that controls on/off the DC loop of the line and outputs a rotating dial pulse, and is composed of a relay or a photocoupler.

A modem 4 inputs/outputs tonal signals and the like to/from the line, has a function of inputting/outputting DTMF signals, and is insulated from the line side by a transformer 12.

5 is a pulse dialer that generates dial pulses and supplies them to the loop control circuit 3; 6 is a keypad for a numeric keypad; and 7 is a control unit that performs overall control of the facsimile machine. It reads input data, sends and receives control signals to and from the modem 4, controls the loop control circuit 3 and the PAL 3 page dialer 5, and so on.

8a and 8b are a calling device and a handset, respectively;
These are integrated to constitute the telephone set 8. 9 is a terminal for connecting the telephone 8, and the line is connected to the relay 10.
011 is switched between the modem 4 side and the telephone 8 side by
A, 111) is a polarity detection circuit for determining line polarity, on/off of the DC loop, etc., and is composed of a reed and a photocoupler.

Next, the operation of the above configuration will be explained. ') In the case of a call operation by the facsimile control unit 7, the control unit 7 first reads the input data from the keypad 6, and the loop control circuit 3 and relay 10 is operated, the line is connected to the rectifier circuit 2 side, and the DC loop is turned on. Thereafter, in the case of a dial line, the pulse dialer 5 is operated and a dial pulse is sent to the line via the loop control circuit 3. In the case of a Bush line, the modem 4 is operated to send out a DTMF signal and a call is made. If it is necessary to monitor the polarity of the line during this time, use the polarity detection circuit 11a or llb.
This is done by

On the other hand, in the case of a calling operation using the telephone set 8, the relay 10 does not operate, the handset 8b is normally hook-amplified, and the calling device 8a performs a rotary dial type or pushbutton type calling operation. Furthermore, information input through the keypad 6 is read by the facsimile control section 7 and processed as facsimile control information.

Problems to be Solved by the Invention In the conventional configuration described above, the calling means consisting of the keypad 6, pulse dialer, etc. attached to the facsimile control unit 7 and the calling device 8a of the telephone 8 have the same function. are duplicated components. Such redundant configurations complicate the device and are a major cause of increased costs.

To solve the above problem, it is conceivable to eliminate the calling means on the telephone side and to make all calls by the calling means on the facsimile control section. However, in that case, when the power is supplied to the facsimile machine and there are only 5 pages left (during a power outage or when the power is turned off).
, you will not be able to make calls when using the telephone.

The reason for this is that the calling means on the facsimile control unit side is operated by the power supply of the facsimile machine, and therefore does not operate in the event of a power outage or the like.

Note that the calling device 8a of the telephone 8 operates with power supplied from the line, so it functions even during a power outage, but in the overall configuration, it is not possible to use only this as the calling device. This is because the calling device 8a cannot be operated by the facsimile control unit 7, and the key band 6 and the like are essential for facsimile control.

This invention was made in view of the above-mentioned conventional problems, and its purpose is to provide a communication device that has a single calling means and is capable of making calls even during a power outage.

Means for Solving the Problems Therefore, the present invention provides a terminal device and its control means that are operated by a power supply isolated from the telephone line, and a handset and receiver that is operated by the line power supplied from the telephone line. a means for connecting the handset to the terminal; a calling means operated by line power to send a calling signal to the line; and a means for outputting input information to the control means and the calling means. When power is supplied to the input means and the control means, the input end of the calling means is connected to the control means, and when power is not supplied to the control means, the input end of the calling means is connected to the control means. and switching means for connecting the input end to the input means.

Operation If power is supplied to the control means, the control means operates according to input information from the input means. In this state, the switching means connects the calling means to the control means, and the calling means operates according to a signal from the control means.

When power is not supplied to the control means, the switching means connects the calling means to the input means. In this state, the calling means operates according to the signal from the input means using the line power, and a telephone call can be made using the handset.

Embodiment FIG. 1 shows the configuration of a communication adapter portion of a facsimile machine to which the present invention is applied. In Figure 1, line terminal 1, rectifier circuit 2, and modem 4 are given the same symbols as in Figure 3.
, the polarity detection circuits 11a and llb, and the transformer 12 are the same components as before. In FIG.
In the present invention, the loop control circuit 13 is configured to be driven by power from the line. Therefore, the same circuit 1
3 is composed of transistors, etc., which must be isolated from the facsimile main body.

14 is a handset and has no means for making a call. 15a.

Reference numeral 15b is a mechanical switch that operates in conjunction with the above, and serves as a hook switch for the handset 14. That is, when the handset 14 goes off-hook, the hook switch 15
a, 15b are closed, the handset 14 is connected to the line, and the loop control circuit 13 is operated to forcibly turn on the DC loop.

Reference numeral 16 is a tone/pulse daikira, and in the case of a rotary dial type call, the dial pulse signal is sent to the loop control circuit 1.
3, and in the case of a push-button call, a DTMF signal is sent to the stable power supply circuit side, which will be described later.

17 is a main control section that controls the entire facsimile; 18 is a sub-control circuit that is independent from the main control section 17 in order to handle loop control and call-related parts of the entire facsimile; Isolation is provided by photocoupler 19.

The stable power supply circuit side receives line power and supplies stable power to the tone/pulse daikira 16 and sub-control circuit 18, maintains DC resistance and alternating current impedance for the line of the terminal, and also supplies stable power to the tone/pulse daikira 16 and sub-control circuit 18. It also has the role of sending DTMF signals to the line.

21 is a tone/pulse dialer 16 and a main control section 17;
9 A-
' A specific example of the circuit configuration of the keypad 21 is shown in Figure 2.
50 is a pair of contacts that operate in conjunction with key presses;
51 is a signal line bundle that connects one of the pair of contacts 50 to the main control unit 17, and 52 is a signal line bundle that connects the other of the contacts 50 to the tone/pulse Daichira 16 via a relay 22, which will be described later. 1, signal power is applied to each signal line belonging to the signal line bundle 51 from the power supply on the main control unit 17 side, and signal power is applied to each signal line belonging to the signal line bundle 52 from the line power. Since the pair of contacts 50 are completely independent, the two signal power sources do not compete. , the relay 22 switches the input signal source of the tone/pulse dialer 16, and when the power is supplied to the Noakunmi 1.1 device, the signal from the sub-control circuit 18 is input to the tone/pulse dialer 16. If power is not supplied to the facsimile machine, use Keybird 21.
No. 11j is input to the tone/pulse Daichira 16 in 1. Next, the operation of the above configuration will be explained in 6.
In the case of a calling operation by the main control unit 17, first the main control unit 1
7 gives a calling command to the sub control circuit 18 via the photocoupler 19. In response to this, the sub control circuit 18 closes the DC loop using the loop control circuit 13, and then generates a signal to stop calling. Since the relay 22 is supplied with facsimile power, it connects the input end of the tone/pulse daikira 16 to the sub-control circuit 18 . Therefore, the call request signal from the sub-control circuit 18 is input to the tone/pulse dialer 16, and in response to this, the dialer 16
In the case of a rotary dial line, the loop control circuit 13 is operated to generate a dial pulse, and in the case of a punonyu line, a DTMF signal is sent to the stable power supply circuit 20 to initiate a call. If it is necessary to monitor the polarity of the line during this time, the polarity detection circuits 11a and 11b do so.On the other hand, in the case of a call using the handset 14, when the handset 14 is first turned off by 7 knocks, 7 noku switch 15a,
15b is closed, and the DC loop is closed.

If the entire facsimile machine is supplied at this time, 11
Par-7 The main control section 17 recognizes the off-hook state from the output of the polarity detection circuit 11b, and reads the telephone number input information from the keypad 21 through the signal line bundle 51. Thereafter, the main control section 17 gives a calling command to the sub-control circuit 18, and calls are made in the same manner as described above.

Furthermore, when facsimile power is not supplied due to a power outage, etc., the relay 22 is connected to the keypad 21 side when the handset 14 is off-hook and the DC loop is turned on. Telephone number input information is directly read through the signal line bundle 52, and a dial pulse or DTMF signal is generated in the same way as when the main control section 17 makes a call, thereby making a call.

When the keypad 6 is used simply as a facsimile control means rather than for the purpose of making calls, the main control section 17 reads input information from the keypad 6 through the signal line bundle 51 and performs predetermined control.

Effects of the Invention As explained in detail above, in the present invention, the calling means on the terminal side is completely isolated from the control section of the main body, and information inputted by input means such as a telephone hipbone etc. Since the structure is such that the information can be read by both the calling means and the control means, the calling means is integrated into one, which simplifies the structure and greatly reduces costs. Of course, calls can be made using the telephone even if power is not supplied to the terminal side.

[Brief explanation of the drawing]

FIG. 1 is a block diagram of a communication adapter portion of a facsimile machine according to an embodiment of the present invention, FIG. 2 is a circuit diagram showing a specific example of the keypad 21 in FIG. 1, and FIG. 3 is a communication adapter of a conventional facsimile machine. It is a block diagram of a part.

Claims (1)

[Claims] A telephone line consists of a terminal device and its control means that operate using an isolated power source, a handset that operates using line power supplied from the telephone line, a means for connecting the handset to the terminal device, and a device that operates using the line power supplied from the telephone line. a calling means that operates to send a calling signal to the telephone line; an input means that outputs input information to the control means and the calling means; and when power is supplied to the control means. a communication device comprising: a switching means for connecting an input end of the calling means to the controlling means; and a switching means for connecting the input end of the calling means to the input means when power is not supplied to the controlling means; .