JPH03173247A - Addition and switching circuit for function for telephone set - Google Patents

Abstract

PURPOSE:To allow the circuit to be applicable to a telephone set being a terminal equipment for various private branch of exchanges and key telephone systems by providing an additional function comprising of a transmission circuit, a reception circuit, a switching circuit and plural multi-core modular jacks or the like. CONSTITUTION:An additional function 1 consists of a transmission circuit 12 connecting to a video camera or the like, a reception circuit 13 connecting to a monitor, a switching circuit 11 and multicore modular jacks 6, 7 connecting to a key telephone terminal telephone set 8 and a handset 2. Moreover, the handset 2 consists of a speaker 16, a microphone 15 and a multi-core modular jack 8. Then the function 1, a key telephone set main body 3 and the handset 2 are interconnected with a modular cord 10 via multi-core modular jacks 5-8. Thus, only a signal line with a transmission signal and a reception signal sent thereon among signal lines from the jacks 5, 6 of the main body 3, for example, is switched to the function 1 and the handset 2 via the circuit 11 to allow the circuit to be applicable to a telephone set being a terminal equipment of various private branch of exchanges and key telephone systems.

Description

DETAILED DESCRIPTION OF THE INVENTION [Field of Industrial Application] The present invention relates to a telephone set, and relates to a circuit configuration for adding functions other than normal transmission and reception of voice signals performed using a handset.

[Conventional technology]

Conventionally, when communicating using a telephone line, a telephone with a handset is used to transmit an audio signal emitted from a mouthpiece, and the received signal is listened to through the earpiece to perform communication. In recent years, in addition to transmitting and receiving audio signals, telephone lines have been used to transmit and receive image signals.

There are many requests to transmit and receive signals other than audio signals, such as drawing signals and FAX signals. When transmitting and receiving signals other than voice signals using telephone lines, the dialing function becomes a problem.

[Problem that the invention seeks to solve]

By the way, there is no problem if the dialing function is incorporated together with the additional functions, but if the dialing function is not incorporated together with the additional functions, the dialing function of the existing telephone will be used. With a normal analog two-wire telephone line, there is no problem in calling the other party or receiving calls by switching the additional function of a telephone with a dialing function over the telephone line.

However, there is a problem when adding additional functions for transmitting and receiving signals other than audio signals, such as image signals and drawing signals, to terminals of private branch exchanges and key telephone systems. Private branch exchanges and key telephone systems consist of a telephone and the main unit, and the interface between the telephone and the main unit is constructed using proprietary intern aids, that is, depending on each manufacturer's specifications, such as those that send and receive analog signals and those that use digital signals. It is something that can be determined and there is no unified interface. If new additional functions are to be added to such a private branch exchange or key telephone system, it will be necessary to provide additional functions for each OL interface. This is true if the interfaces of each company are made public, but they are generally not made public, and private branch exchanges and key telephone systems have an additional 1.
It means that it cannot be added to Ikuno.

The object of the present invention is to provide a switching circuit that can be used with such private branch exchanges and telephones that are terminals of key telephone systems.

[Means for solving problems]

In the telephone function addition switching circuit of the present invention, it is necessary that the telephone, which is a terminal, has a handset connected to the entire multi-core modular cord. Rather than switching between the telephone and the additional functions on the winning side, the present invention attempts to switch between the handset and the additional functions. For telephones that use a multi-conductor monophonic cord.../The interface between the terminal and the telephone terminal consists of four signal lines: a transmit signal from the microphone built into the handset, a receive signal to the speaker, a power supply, and a power ground. . The power supply is used to drive the microphone, as modern microphones are condenser microphones. The transmitted signal and the received signal are made up of unbalanced circuits.

In the present invention, the telephone is connected to the additional function switching circuit via a multi-pin modular jack on the telephone body.

In the switching circuit, it is connected to a switching circuit that switches to an additional function for the signal line in the multi-core monolayer network. Transmission/reception signals and power lines to the handset side are connected to the handset via a modular jack.

On the other hand, the additional function side is connected to a transmitting circuit, a receiving circuit, etc., and can be switched by manual or automatic switching operation of the switching circuit.

Furthermore, in the present invention, among the signal lines from the multi-core modular jacks from the two main bodies, only the transmitting signal and the receiving signal are switched via a switching circuit between the output function side and the output side. That is, the power supply line for the power supply is for the drive voltage of the handheld microphone, and is essentially unnecessary on the additional function side.

〔Example〕

FIG. 1 is a block diagram of a practical example of the present invention.

Additional function 1 here is a transmission device that transmits and receives image signals. The additional function 1 is connected to the handset 2 and the digital key telephone terminal telephone 3 by a modular cord 1o via a multi-core monophonic cable 6, 7. From the digital key telephone terminal phone, the monophonic gloss 9
Connected to the main telephone body [1 (l K) through the

FIG. 2 shows details of the configuration shown in FIG. 1.

Additional functions include a transmitting circuit 12 connected to a video camera or the like. Receiving circuit 13 connected to the monitor. Power supply circuit 1
4, a switching circuit 11, a multi-conductor monophonic jack 6 for connection to the digital key telephone terminal telephone 3 side, and a multi-conductor monophonic jack 7 for connecting to the handset 2 side. The handset 2 includes a speaker 16, a microphone 15, and a multi-pin modular jack.

The digital key telephone main body 3 converts the signal from the transmitter circuit into an analog signal via the A/D conversion circuit 17 into a digital signal, and sends the signal via the driver circuit 19 to the digital key telephone main body. The received signal on the − side is the receiver −
The digital signal is converted back into an analog signal via the circuit 20 and the D/A conversion circuit. The digital key telephone body has a dial function 21 as a matter of course.

The main body 3 and the additional function 1 having a switching circuit are connected by a monocular cord "io". Also, the handset 2 and the additional function 1 are connected by a modular cord 10. For example, the switching circuit 11 shown in FIG. Of these, only the transmitting signal and the receiving signal are switched by the switching circuit and connected to the transmitting circuit 12 and the receiving circuit in the additional function.

Fig. 3 shows the configuration when the additional function 28 is connected to a conventional two-wire analog telephone line @29, and Fig. 4 is a block diagram showing the details of Fig. 3. The difference in configuration is whether the telephone line is connected to the telephone via the additional function side, and in Fig. 3 it is connected, but in Fig. 1 it is not connected and it is connected via the additional function side. ...Only the end set.

〔Effect of the invention〕

As explained above, in the present invention, when connecting a device (additional function) that sends and receives various signals using one telephone line, the telephone line can be changed to two analog lines by switching at the interface of the handset that has a monocular jack. Additional functions can be connected not only to lines but also when the interface between various private branch exchanges and key telephone systems and the telephone is a 4-wire dinotal interface. That is, this is because the handset interface has a router for transmitting and receiving analog signals.

[Brief explanation of the drawing]

Fig. 1 is a block diagram of an embodiment according to the present invention, Fig. 2 is a detailed diagram of an embodiment according to the present invention, Fig. 3 is a block diagram of a conventional two-wire analog line, and Fig. 4 is a two-wire system. FIG. 1 is a diagram showing a detailed configuration of an analog line. ■...Additional functions, 2.../Sdo Sesoto, 3...
Key telephone terminal telephone, 4...Key telephone body,
5 to 9...Multi-core monoyura, 10...Mononylar cord. 11...Switching circuit, 12...Transmission circuit, 13...
Receiving circuit, 14... Power supply circuit, 15... Microphone, 16... Speaker, 17... A/D conversion circuit,
18...D/A conversion a circuit, l 9...Driver, 20...Receiver-21...Dial function, 22
~25...Multi-core mosola. 26... Hand cent, 27... Power supply unit, 28
...Additional functions, 29...Telephone line. Figure 2

Claims (1)

[Claims] 1. In a telephone equipped with a handset that transmits and receives calls via a multi-conductor modular cord, a transmitter that is inserted between the telephone body and the handset and has the function of transmitting a transmission signal and the function of processing the transmission signal. a circuit, a receiving circuit having a function of receiving a received signal, a receiving circuit having a function of processing the received signal, a transmitting circuit, a circuit associated with the receiving circuit, a first connection terminal connected to the telephone body, and a second connection connected to the handset. and a switching means for switching the signal line to the first connection terminal to a circuit side including the transmission circuit, the reception circuit, and the auxiliary circuit, and to the second connection terminal. Functional addition switching circuit for telephones. 2. In claim 1, the switching means is provided only for the signal lines to the transmitting circuit and the receiving circuit among the signal lines to the first connection terminal, and the other signal lines is a functional addition switching circuit for a telephone, characterized in that it is directly connected to the second connection terminal. 3. The additional function switching circuit for a telephone according to claim 2, wherein the switching means is switched by a predetermined switching operation.