JPH0541748A - Facsimile equipment with attendant sounding prevention function - Google Patents

Abstract

PURPOSE:To prevent an attendant sounding phenomenon for call originating operation at the time of using a facsimile equipment where plural dial pulse type telephone sets are connected in parallel. CONSTITUTION:The output end of a telephone line L is branched to a facsimile FAX and a telephone TEL, and plural telephone sets T and T' and an outgoing/ incoming detection circuit 4 which detects a dial originating pulse and a call signal are connected to the telephone TEL in parallel, and telephone sets T and T' are provided with off-hook detecting circuits 7 and 7' and line connection/disconnection relays 6 and 6'. When the handset of either of telephone sets T and T' is hooked off and the dial call originating operation is performed, line connection/disconnection relays 6 and 6' of telephone sets T and T' other than the telephone set which performs the dial call originating operation are opened by a signal processing part 5.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an improvement of a facsimile apparatus configured to additionally connect two or more dial pulse type telephones to a telephone line.

[0002]

2. Description of the Related Art Recently, in addition to the addition of a built-in telephone to a facsimile device, a device which can be connected to another telephone has been developed and used. When a dial pulse type telephone (which outputs a dial calling pulse when making a call) is additionally connected in parallel and used, when one of the telephones and the facsimile machine outputs a dial calling pulse and performs a calling operation, Unlike the case of the push line, the voltage level of 0V and 48V fluctuates in the telephone line in response to the dialing pulse. For this reason, when one of the telephones makes a call, there is a problem that the calling bell rings at the other telephone, the ringing phenomenon is mistaken, and the telephone receiver is picked up.

[0003]

SUMMARY OF THE INVENTION The present invention has been made in view of such circumstances, and when two or more dial pulse type telephones are connected in parallel to a telephone line and used,
It is an object of the present invention to provide a facsimile device having a structure capable of preventing the accompaniment noise phenomenon described above.

[0004]

In order to achieve the above object, the present invention is proposed in which the output end of a telephone line is branched into a facsimile side and a telephone side, and two or more telephones are connected in parallel on the telephone side. In the facsimile machine described above, a calling / incoming call detection circuit for detecting a dialing call pulse signal and a ringing signal is further connected to the telephone side, and an off-hook detection circuit and a line disconnection relay are connected to each of the above telephones. When a dial call operation is performed by removing the handset of any of the above telephones, the signal processing unit opens the line connection / disconnection relay attached to the telephone other than the dial call originator.

[0005]

According to the facsimile apparatus of the present invention, the following operation is performed. When the handset of one of the telephones is removed, the off-hook detection circuit of that telephone turns on. Then, when a dialing operation is performed by operating the dial of the telephone that picks up the handset, at that time, the telephone sets the predetermined frequency (for example, 1
Since the dial calling pulse of 0PPS, 20PPS) is output, the dial calling pulse signal at this time is detected by the calling / incoming detection circuit, and the calling detection signal is output. Upon receiving the call detection signal from the call / call detection circuit, the signal processing unit opens the line connection / disconnection relay attached to the telephone that is not dialing. As a result, the telephone set on the side not performing the dial call operation is disconnected from the telephone line and the ringing is prevented.

Further, when the facsimile apparatus operates the dial calling circuit to perform the dial calling operation, this state can be discriminated by discriminating the operation state of the start switch in the signal processing section. The telephone is disconnected from the line by opening the control contact of the line control means connected to. As a result, the dial call pulse output from the facsimile device is not sent to the telephone side, and the ringing is prevented.

[0007]

An embodiment of the present invention will be described below with reference to the accompanying drawings. FIG. 1 is a block diagram showing a main configuration of a facsimile apparatus A of the present invention. As shown in the figure, the telephone line L is connected to the line control means 1 having a control contact 1a in which the telephone side TEL is closed and the facsimile side FAX is opened, and the output side of the line control means 1 is the telephone side TEL. It is branched to the FAX-side FAX. Then, the dial side calling circuit 2 and the facsimile transmission / reception control section 3 are connected to the facsimile side FAX of the line control means 1, and the two telephones T and T'and the calling / incoming detection circuit 4 are connected to the telephone side TEL. They are connected in parallel. In this example, T is a built-in telephone additionally connected to the facsimile apparatus A, and T'is another telephone connected to the telephone line L in common. The line control means 1 switches its control contact 1a from the state in which the telephone side TEL is closed to the state in which the facsimile side FAX is closed by the switching control signal sent from the signal processing unit 5 composed of a microcomputer and the like. The call / incoming call detection circuit 4 sends a call detection signal and a call detection signal to the signal processing unit 5 when it detects a dial call pulse signal of 10 Hz or 20 Hz or a call signal of 16 Hz transmitted through the telephone line L. Each of the telephones T and T'has an off-hook detection circuit 7, 7'and a line disconnection relay 6, 6'having normally closed contacts 6a, 6a '. Circuit disconnection relay 6,
Each of 6'controls opening and closing of the normally closed contacts 6a, 6a 'by a control signal sent from the signal processing unit 5. Furthermore, the on-hook detection circuit 7,
7'is turned on when picking up each of the handsets of the telephones T and T ', and when this is turned on, the dial calling circuit (not shown) of the telephones T and T'is connected to the line LT of the telephone side TEL and turned off. If so, set each of the telephones T and T'to the telephone side T.
Disconnect from the EL line LT. In this embodiment, two telephones T and T'are connected in parallel to the telephone side TEL of the line control means 1, but three or more telephones may be connected.

Next, the operation of the facsimile apparatus A of the present invention having the above-mentioned structure will be described. When the handset of one of the telephones (for example, T) is taken off, the off-hook detection circuit 7 of the telephone T is turned on, so that the telephone T is connected to the telephone line L through the control contact 1a of the line control means 1. Thereafter, when the telephone set T operates the dial, a dial calling circuit (not shown) is activated, and a dial calling pulse signal (for example, 10PPS, 20P) having a prescribed frequency is activated.
Since PS) is output, voltage level fluctuations of 0V and 48V occur in the telephone line L in response to the dial call pulse signal. When the dialing call pulse signal output at this time is detected by the calling / incoming call detection circuit 4 connected in parallel with the telephone set T, a calling detection signal is output, and signal processing that receives this calling detection signal is performed. The section 5 opens the line disconnection relay 6'attached to the telephone set T'on which the dialing operation is not performed, that is, the telephone set T'on which the on-hook detection circuit 7'is turned off. As a result, the telephone set T'on the side not performing the dial call operation is
Call bell (not shown)
Does not generate a ringing sound by receiving a dial call pulse signal and operating. 2A to 2E are time charts showing the operation of each unit in this case.

Further, when the facsimile apparatus A performs a dial call operation, the start switch is normally operated, so that the signal processing unit 5 determines whether or not the operation is performed, and thus the telephone line L is provided. The control contact 1a of the line control means 1 is switched to the facsimile side FAX. Then, since the two telephones T and T'are both disconnected from the telephone line L, the accompanying resonance is prevented. Figure 3a)
(E) shows the operation | movement of each part in this case with a time chart.

On the other hand, when a call signal of 16 Hz is transmitted through the telephone line L, the calling / incoming call detection circuit 4
Then, this ringing signal is detected and an incoming call detection signal is output. The signal processing unit 5 receiving this incoming detection signal switches the line connection means 1 to the facsimile side FAX and disconnects the telephones T and T'from the telephone line L. In the present invention, such disconnection operation is performed. When the outgoing / incoming call detection circuit 4 receives the ringing signal at the previous stage, the signal processing unit 5
Since the control contacts 6a and 6a 'of the connection / disconnection relays 6 and 6'attached to both telephones T and T'connected to L are opened at the same time, within the period when the call bell rings until the facsimile device A receives a call. Also, it is possible to prevent the ringing of the telephones T and T ′ from operating. 4 a) to e)
Shows the operation of each unit in this case with a time chart.

[0011]

As can be understood from the above description, according to the facsimile installation of the present invention, even when a plurality of dial pulse type telephones are connected in parallel, the ringing phenomenon of the telephones can be effectively used. It can be prevented.

[Brief description of drawings]

FIG. 1 is a block diagram showing a main configuration of a facsimile apparatus A according to the present invention.

FIG. 2 is a time chart showing a control operation procedure when a dial call is made from a telephone.

FIG. 3 is a time chart showing a control operation procedure when a dial call is made from the facsimile device.

FIG. 4 is a time chart showing a control operation procedure when the facsimile apparatus receives an incoming call.

[Explanation of symbols]

 A ... Facsimile device L ... Telephone line 1 ... Line control means 1a ... Control contact 2 ... Dial calling circuit 3 ... Facsimile transmission / reception control unit 4 ... Calling / receiving Detection circuit 5 ... Signal processing unit 6, 6 '... Line disconnection relay 6a, 6a' ... Normally closed contact 7, 7 '... Off-hook circuit T, T' ... Telephone

Claims (1)

[Claims] 1. The telephone line output end is a facsimile side,
It is branched to the telephone side, and the telephone side is connected with a plurality of telephones and a calling / incoming call detection circuit that detects a dialing call pulse signal and a ringing signal, and each of the above telephones has an off-hook detection circuit and a line. A connection / disconnection relay is provided, and when the handset of any of the above telephones is removed and a dial call operation is performed, the signal processing unit opens the line connection / disconnection relay attached to the telephone other than the dial call originator. Facsimile machine with a built-in accompaniment prevention function.