JP2002171360A - Facsimile equipment - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide facsimile equipment, which has a function for switching a telephone set and a facsimile and can save a space. SOLUTION: In a body 1 of a facsimile, an externally controllable relay 21 is provided in a primary side circuit 22 of a DAA 2 and an external telephone set 26 is parallel connected. Thus, a facsimile (telephone line 25) and the external telephone set 26 can be simultaneously connected by one telephone line.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a facsimile apparatus, and more particularly, to a facsimile apparatus having an automatic switching function between a telephone and a facsimile.

[0002]

2. Description of the Related Art As a facsimile apparatus having a function of automatically switching between a telephone and a facsimile, Japanese Patent Laid-Open No. 7-16263 is disclosed.
No. 5 discloses a CNG (calling tone) signal transmitted by a transmitting side, and detects a signal having a frequency different from that of the CNG signal to determine whether the transmitting side is a telephone or a facsimile. There has been proposed a facsimile apparatus capable of accurately switching automatically between a telephone and a facsimile by avoiding detection.

[0003]

In a facsimile apparatus having a function of automatically switching between telephone and facsimile,
Recently, miniaturization has been required. In order to achieve miniaturization, it is conceivable to employ a semiconductor DAA (communication control device) as a communication chip. However, the semiconductor DAA is compatible with a card modem used mainly for personal computers, and is usually used for this purpose. When using for facsimile, a separate line is required to connect to the telephone,
The cost will increase.

An object of the present invention is to provide a facsimile apparatus which has a function of switching between a telephone and a facsimile and can save space.

[0005]

In order to achieve the above object, an invention according to claim 1 includes a primary circuit and a secondary circuit, and the primary circuit includes an externally controllable external telephone. The present invention relates to a facsimile apparatus including a communication control circuit made of a semiconductor chip having a relay capable of switching facsimile.

The invention according to claim 2 relates to the facsimile apparatus according to claim 1, wherein the main control means for controlling the whole performs switching control between an external telephone and a facsimile.

In the present invention, a communication control circuit (hereinafter referred to as DAA)
By providing an externally controllable relay in the primary side circuit and connecting an external telephone in parallel, it is possible to simultaneously connect the facsimile and the external telephone with one telephone line.

[0008]

Embodiments of the present invention will be described below with reference to the drawings. FIG. 1 is a functional block diagram of a facsimile apparatus according to an embodiment of the present invention. The facsimile main body 1 includes a DAA 2, a CPU 3, a modem 4, an operation unit 5,
It includes a paper discharge unit 6, a reading unit 7, a writing unit 8, a sounding circuit 9, a DTMF receiver 10, and a tone decoder 11.

The DAA 2 has a primary side circuit 22 having a relay 21, a secondary side circuit 23, and an insulating section 24. The relay 21 switches and connects a telephone line (facsimile line) 25 and an external telephone 26. This relay 21 can be externally controlled.

A CPU (main control means) 3 controls the facsimile main body 1 and also controls the facsimile (the telephone line 2).
5) and switching control between the external telephone 26 is performed. Further, the CPU 3 turns on the switch 27 of the ringing circuit 9 and calls the external telephone 26.

The insulating section 24 of the DAA 2 is
And the secondary circuit 23, and the primary circuit 22
Transmits a signal to the secondary side circuit 23. This signal is input to the CPU 3 via the modem 4. Further, a signal transmitted to the DTMF receiver 10 and the tone decoder 11 via the insulating unit 24 is also input to the CPU 3.

As described above, according to the present invention, the externally controllable relay 21 is provided in the primary circuit 22 of the DAA 2 and the external telephone 26 is connected in parallel, so that the facsimile (telephone line 25) can be connected to one telephone line. The simultaneous connection of the external telephone 26 is enabled.

FIG. 2 is a flowchart of a first control example. It is determined whether or not the external telephone 26 (which is simply referred to as a telephone in the flowchart) is off-hook based on a call signal (S1) from the exchange (S2). If the hook is not off-hook, the facsimile is switched to the facsimile side (S3), and the facsimile is off-hook (S4).

When the external terminal 26 is off-hook and the destination terminal is a telephone (N in S5), the conversation is performed as it is (S6). If the destination terminal is a facsimile (Y in S5), the CNG signal transmitted from the destination terminal is recognized, and a specific DTMF signal is transmitted from the push button of the external telephone 26 by the operation of the operator ( S7).

The DTMF receiver 10 is connected to the external telephone 2
6, the terminal 3 recognizes that the destination terminal is a facsimile, transmits a relay switching signal from the CPU 3, and switches the line to the facsimile side (the telephone line 25 side) (S8). Facsimile communication is performed (S9).

FIG. 3 is a flowchart of a second control example. It is determined whether or not the external telephone 26 (which is simply referred to as a telephone in the flowchart) is off-hook based on a call signal (S1) from the exchange (S2). If the hook is not off-hook, the facsimile is switched to the facsimile side (S3), and the facsimile is off-hook (S4).

When the external telephone 26 is off-hook, if the destination terminal is a telephone, no CNG signal is detected (N in S5), and the conversation is performed as it is (S6).
If the destination terminal is a facsimile, the CNG signal transmitted from the destination terminal (Y in S5) is transmitted to the external telephone 26 and simultaneously transmitted to the tone decoder 11 via the insulating unit 24. .

When the tone decoder 11 detects the frequency of this signal for a certain period of time and recognizes the CNG signal, it determines that the other terminal is a facsimile and automatically switches the relay 21 from the external telephone 26 to the facsimile. After switching (S7), facsimile communication is performed (S8).

FIG. 4 is a flowchart of the third control example. In the facsimile priority standby state, the facsimile main body 1 receives a signal without ringing the external telephone 26 with a calling signal from the exchange (S1, S2).
2). The CNG detection at this time is performed by the modem 4 (S
3).

If no CNG signal is detected (N in S3), that is, if the destination terminal is a telephone, the modem 4 cannot recognize the CNG signal. Determines that the destination terminal is a telephone.

As a result, the CPU 3 operates the external telephone 2
The ringing circuit 9 is instructed to generate a ringing signal for calling the ringing device 6, the ringing circuit 9 is connected by the switch 27, and the external telephone 26 is called from the ringing circuit 9 by a pseudo ringing signal (S4). Next, when it is recognized that the external telephone 26 has been off-hook (S5), the relay 21 is switched from the facsimile side to the external telephone 26 (S6), and a call is made (S7). If the destination terminal is a facsimile (S
At 3 (Y), normal facsimile communication is performed (S8).

[0022]

According to the present invention, an externally controllable relay is provided in the primary circuit of the DAA, and an external telephone is connected in parallel, so that simultaneous connection of the facsimile and the external telephone can be performed with one telephone line. Will be possible.

[Brief description of the drawings]

FIG. 1 is a functional block diagram of a facsimile apparatus according to an embodiment of the present invention.

FIG. 2 is a flowchart of a first control example.

FIG. 3 is a flowchart of a second control example.

FIG. 4 is a flowchart of a third control example.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 Facsimile main body 2 DAA (communication control circuit) 3 CPU (main control means) 4 Modem 5 Operation part 6 Paper discharge part 7 Reading unit 8 Writing unit 9 Sounding circuit 10 DTMF receiver 11 Tone decoder 21 Relay 22 Primary circuit 23 Two Secondary circuit 24 Insulation unit 25 Telephone line 26 External telephone 27 Switch

Claims (2)

[Claims] A primary circuit and a secondary circuit are provided, and the primary circuit is provided with a communication control circuit made of a semiconductor chip having a relay capable of external control and capable of switching between an external telephone and a facsimile. Facsimile machine characterized by the above-mentioned. 2. The facsimile apparatus according to claim 1, wherein the main control means for controlling the whole performs a switching control between the external telephone and the facsimile.