JPH01202967A - Connection system for facsimile transmitter-receiver - Google Patents

Abstract

PURPOSE:To use speech and facsimile communication for the purpose by connecting directly a facsimile transmitter-receiver to a business phone and operating one transmission-reception button of the facsimile transmitter-receiver. CONSTITUTION:A variable resistor 2, a transformer 3 and an acoustic coupler input/output circuit 6 are provided in parallel with a handset of a telephone set between sound signal input/output terminals 1, 11 of a handset of a telephone set and a facsimile signal input/output terminal of a facsimile transmitter- receiver A. An acoustic coupler input/output circuit, a transformer 8 and a variable resistor 7 are connected in parallel with a receiver of a telephone set. The transformers 3, 8 cut off a DC between the telephone set and the facsimile transmitter-receiver A to keep the circuit impedance proper to the both. Thus, a facsimile transmitter-receiver is installed to each telephone set to apply facsimile communication directly to a person similarly as the dial-in telephone set.

Description

DETAILED DESCRIPTION OF THE INVENTION Technical Field The present invention relates to a connection system between a facsimile transmitter/receiver and a telephone.

<Prior Art> Conventionally, facsimile transceivers have been connected to general public telephone lines, and for example, facsimile transceivers cannot be connected to individual telephones for business phones. A facsimile transmitter/receiver equipped with an acoustic coupler input/output circuit has a problem in that an acoustic coupler must be attached to the handset of the telephone each time a facsimile communication is to be made.

<Purpose of the Invention> In view of the above-mentioned problems, the object of the present invention is to connect a facsimile transmitter/receiver directly to, for example, an individual business phone, and use a single transmit/receive button on the facsimile transmitter/receiver to switch between calls and facsimile communication. shall be.

<Structure of the Invention> The present invention is characterized in that a facsimile transmitter/receiver is directly connected to a handset of a telephone, particularly a terminal telephone of an office collective telephone and a private branch exchange.

With the above configuration, the signal generated from the transmitter circuit is adjusted to a level suitable for facsimile signals, and DC coupling is eliminated. and adjusting the output of the facsimile to a level suitable for the handset and eliminating direct current coupling.

<Embodiment of the Invention> The drawing is a circuit diagram showing a connection system that is an embodiment of the present invention. Embodiments of the present invention will be described in detail below with reference to the drawings.

In a configuration in which the present invention is interposed between audio signal input/output terminals 1 and 11 of a handset of a telephone (not shown) and a facsimile signal input/output terminal of a facsimile transmitter/receiver, a volume controller is connected in parallel to the transmitter of the telephone. 2, a transformer 3, and an acoustic coupler input/output circuit 6, and an acoustic coupler input/output circuit 6, a transformer 8, and a volume 7 are provided in parallel with the receiver of the telephone.

Connect the audio signal output terminal 1 of the transmitter of a telephone (not shown) to the volume 2, and connect the transformer 3 to the volume 2.
is connected, and a capacitor 4 is connected to the transformer 3. Capacitor 4 is connected to acoustic coupler input/output circuit 6. A capacitor 5 is provided between the capacitor 4 and the acoustic coupler input/output circuit 6. The acoustic coupler input/output circuit 6 is connected to the facsimile signal line of the facsimile transceiver A. The facsimile signal line of the facsimile transmitter/receiver A is connected to an acoustic coupler input/output circuit 6, and a volume 7 is connected to the acoustic coupler input/output circuit 6. A transformer 8 is connected to the volume 7. A capacitor 9 is connected following the transformer 8. Capacitor 9 is a telephone (
It is connected in parallel with the audio signal input terminal 11 of a telephone receiver (not shown). A capacitor 10 is provided between the capacitor 9 and the audio signal input terminal 11 of the receiver.

Transformers 3 and 8, such as a 600Ω:600Ω matching transformer, block direct current between the telephone (not shown) and the facsimile transceiver A, maintaining proper circuit impedance for both. Capacitors 4, 9, e.g. 22074
The F electrolytic capacitor prevents the impedance of the transformers 3 and 8 from directly influencing the input side to a telephone (not shown) and a facsimile transceiver, and maintains an appropriate AC impedance. The capacitor 5.10, for example a 0.degree. 1 .mu.F ceramic capacitor, prevents the system according to the present invention from affecting the telephone (not shown) and facsimile transceiver A and the possibility of oscillations. Volumes 2, 7, for example 100 and Ω, provide fine adjustment of the level between the telephone (not shown) and the facsimile transceiver A. A circuit equivalent to the acoustic duplexer circuit of the facsimile transceiver, such as an acoustic duplexer input/output circuit 6, is connected to the facsimile transceiver A.

Between the transformer 3 on the input side of the telephone and the acoustic coupler input/output terminal 6, and between the transformer 8 on the input end to the facsimile transceiver and the acoustic coupler input/output terminal 6.
Capacitors 4 and 9 are provided to prevent the impedance of the transformers 3 and 8 from being directly affected and to maintain AC impedance. Furthermore, a capacitor 5. is used to prevent oscillation. 10 each.

<Effects of the Invention> As described above, according to the present invention, general telephone lines, office groups 1! A facsimile transceiver can be connected to each individual telephone, whether it is a local telephone or a terminal telephone of a private branch exchange. Furthermore, there is no need for a dedicated facsimile telephone line, and facsimiles can be sent and received over any line. In addition, facsimile communication can be easily performed between extension telephones such as office group telephones.

Therefore, by installing a facsimile transceiver on the side of each telephone, direct facsimile communication to individuals becomes possible, similar to dial-in telephones, and there is no need to go back and forth to the location where a specific facsimile transceiver is installed, as in the past. There is no. Further, there is no need for dialing charges for facsimile communication between extension telephones such as office group telephones, and facsimiles can be broadcasted using the extension-to-simultaneous calling function.

Unlike the aforementioned facsimile transceiver that uses an acoustic cover, you do not need to attach an acoustic cover to the handset when making facsimile communications; you can simply press the receive button on the facsimile transceiver and use it for calls and facsimile communications. .

[Brief explanation of the drawing]

The accompanying drawings illustrate embodiments of the present invention.

Claims (2)

[Claims] (1) A facsimile transmitter/receiver connection method characterized in that the facsimile transmitter/receiver is directly connected to a telephone handset. (2) The facsimile transmitter/receiver connection system according to claim 1, wherein the telephone is a terminal telephone of an office collective telephone and a private branch exchange.