KR19980014702A - Telephone set with public telephone network output terminal - Google Patents

Abstract

A telephone set having an input unit for communication with a public telephone network and a telephone circuit connected to the input unit, the telephone set including an output terminal for connecting the public telephone network input through the input unit to an external device. As a result, the space limitation required when an external device such as a modem or the like is connected to the public telephone network is relaxed, and more stable connection is possible.

Description

Telephone set with public telephone network output terminal

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a telephone set, and more particularly to a telephone set having an output terminal capable of connecting a public telephone network input through a telephone set to an external apparatus.

Generally, a modem is widely used to connect a computer to a communication network by using a public telephone network. A modem is a device that converts digital data into analog signals or converts analog signals into digital data. It is installed between a computer and a public telephone network, and includes an internal modem that plugs directly into the computer's main board and an external modem that is separate from the computer. The use of such a modem has been increasing with the development of information and communication technology, and accordingly, a case where a telephone set and a modem are shared by a single telephone line is increasing.

FIG. 5 shows a method in which a conventional telephone set and a modem for a computer are connected to a public telephone network. As shown in the figure, the modem 57 is basically provided with an input terminal 53 for connecting to the public telephone network and an output terminal 55 for the telephone. The modem 57 is connected to the public And the telephone 59 is connected to the output terminal 55 of the modem 57. [ Therefore, when the modem 57 and the telephone 59 are connected together to one telephone line, serial connection is required as shown in FIG. 5. In this case, the telephone must always be adjacent to the modem. However, when the modem and the telephone are connected in parallel to the public telephone network, if one of them attempts to use another one, the communication state becomes unstable or the connection is terminated in severe cases.

However, since the telephone has an increased mobility such as a wireless telephone or a cellular phone, the space restriction required for connection to the public telephone network is alleviated. On the other hand, since the modem is wired to the public telephone network, the computer equipped with the modem is close to the public telephone network connection terminal There is still a spatial constraint to be installed. Thus, it would be highly desirable if the modem could be directly connected to a telephone with relatively less space constraints.

SUMMARY OF THE INVENTION It is therefore an object of the present invention to provide a telephone set having a public telephone network output terminal to which an external device such as a modem or the like can be connected, thereby alleviating spatial restrictions required for connection of a modem or the like.

Another object of the present invention is to provide a telephone set that improves the stability of communication when a modem or the like is connected.

1 is a schematic block diagram of a telephone set according to the present invention,

2 is a schematic block diagram showing the use state of the telephone set according to the present invention,

3 is a schematic block diagram showing a use state of a telephone set according to another embodiment of the present invention,

4 is a schematic block diagram showing a use state of a telephone set according to another embodiment of the present invention,

5 is a schematic block diagram of connecting a modem using a conventional telephone set.

DESCRIPTION OF THE REFERENCE NUMERALS

10: telephone 11: telephone opportunity

13: Input terminal 15: Output terminal

17: Connection switching circuit

According to the present invention, there is provided a telephone set having an input unit for communication with a public telephone network and a telephone circuit connected to the input unit, the telephone set having an output terminal for connecting the public telephone network input through the input unit to an external device And a telephone set which is characterized in that it comprises a telephone set.

Here, it is preferable that the telephone circuit and the output terminal are connected in parallel to the input section, and the switch circuit and the output terminal are selectively connected to the telephone circuit and the output terminal.

The input unit may be an input terminal wired to the public telephone network or may have an antenna for wireless connection to the public telephone network.

According to another aspect of the present invention, there is provided a telephone set having a main telephone connected to a public telephone network and a cordless telephone wirelessly communicating with the main telephone, the cordless telephone including a public telephone network signal input to the cordless telephone, A set of telephone sets including an output terminal for connection to an external device is provided.

Hereinafter, the present invention will be described in detail with reference to the drawings.

1 is a schematic block diagram of a telephone set according to the present invention. As shown in the figure, the telephone set 10 has a telephone call opportunity 11 for normal voice transmission and reception and an input terminal 13 for connecting the telephone call route 11 to the public telephone network. The telephone 10 also has an output terminal 15 for outputting a public telephone network signal connected via an input terminal 13. The output terminal 15 is connected to the input terminal 13 via the telephone call route 11 And are connected in parallel. A connection switching circuit (17) is provided at a branching portion between the output terminal (15) and the telephone channel (11).

An external device such as a modem can be connected to the output terminal 15. The connection switching circuit 17 selectively outputs the public telephone network signal input to the input terminal 13 to the telephone call route 11 and the output terminal 15 .

As the connection switching circuit 17, for example, a relay can be used. That is, the input terminal 13 is connected to the common terminal of the relay, and one of the connection terminals of the relay is connected to the telephone channel circuit 11 and the other connection terminal of the relay is connected to the output terminal 15. The control signal of the relay is converted into a telephone call opportunity 11 and a hook-on signal of an external device such as a modem. Once the modem is in the on-line mode, And the input terminal 13 is cut off and the telephone call route 11 is once turned to the ON-Hook state until the OFF-hook state is established between the input section 13 and the output terminal 13, (15) is disconnected.

The switching connection circuit 17 may be omitted in some cases. This is because the user can always selectively use the telephone and the modem.

2 is a schematic block diagram showing the use state of the telephone set according to the present invention. As shown in the figure, the telephone 20 is connected to the public telephone network 21 via an input terminal 24 and the modem 27 is also connected to the output terminal 25 of the telephone 20 by wire . The modem 27 is connected to the public telephone network 21 input through the telephone 20 and is connected to the telephone 20 and the public telephone network 21 selectively. Thus, the telephone 20 is usually located at a place where it is normally used. When the user wants to use the modem 27, the telephone 20 is moved to the place where the modem 27 is located, can do.

3 shows a case in which a modem is connected using a cordless telephone which is increasing in recent years. Here, the telephone set consists of a main telephone 30 and a cordless telephone 33. The public telephone network 31 is wired to the input terminal 32 of the main telephone 30 and the main telephone 30 and the cordless telephone 33 are connected wirelessly. The wireless telephone 33 is connected to the public telephone network 31 transmitted from the main telephone 30 through the antenna 34 and has an output terminal 35 for outputting the public telephone network 31. [ The modem 37 is connected to the output terminal 35 of the wireless telephone 33. In this case, in order for the modem 37 to access the public telephone network 31, the wireless telephone 33 must be in a state capable of communicating with the main telephone 30. [

This embodiment makes it possible to connect an external device such as a modem to the wireless telephone 33 that is relatively free to move in the space, thereby avoiding the space restriction for connection of the modem to the public telephone network of the computer, and to eliminate troublesome line work .

4 shows a connection state of a modem using a cellular phone which is directly connected wirelessly to a public telephone network. The cellular phone 40 has an antenna 44 for wirelessly connecting to the public telephone network 41 and has an output terminal 45 for outputting the public telephone network inputted through the antenna 44. [ The modem 47 is connected to the output terminal 45 of the cellular phone 40 so that the modem 47 can be connected to the public telephone network 41 via the cellular phone 40. [

This embodiment is advantageous in that communication can be carried out spatially extremely freely by connecting to a cellular phone easily without additional equipment, especially when communicating through a notebook computer.

INDUSTRIAL APPLICABILITY As described above, according to the present invention, the space limitation required when connecting a public telephone network is alleviated by a telephone set having a public telephone network output terminal to which an external device such as a modem can be connected, and more stable connection is possible.

Claims (6)

An input unit for communication with the public telephone network, A telephone set having a telephone circuit connected to the input unit, And an output terminal capable of connecting a public telephone network input through the input unit to an external device. The method according to claim 1, Wherein the telephone circuit and the output terminal are connected in parallel to the input unit. The method according to claim 1, And switch connection means for selectively connecting the input section to the telephone circuit and the output terminal. The method according to claim 1, Wherein the input unit is an input terminal wired to the public telephone network. The method according to claim 1, Wherein the input unit includes an antenna for wirelessly connecting to the public telephone network. 1. A telephone set having a main telephone connected to a public telephone network and a cordless telephone wirelessly communicating with the main telephone, The wireless telephone comprising: And an output terminal for connecting a public telephone network signal input to the wireless telephone to an external device.