JPH03114337A - Telephone set - Google Patents

Abstract

PURPOSE:To attain automatic switching of 4/2-wire by providing a hardware having at least one of voltage detecting function and a serial data analysis function so as to discriminate whether or not the telephone set connects to a 4-wire telephone line. CONSTITUTION:A voltage of a telephone line and serial data detection function is provided. In the case of the 4-wire system, a power supply 6 is supplied, a voltage detection circuit 5 is activated and the 4-wire system is informed to a control block 4, which sets the hardware and the software to the 4-wire system from that point of time. Moreover, in the case of the 2-wire system, since the power supply 6 is not supplied, the control block 4 discriminates the 2-wire system to set hardware and the software to the 2-wire system. Thus, it is not required to grasp the line system (4/2-wire system) of the location of a multi-function telephone set and no manual setting is required.

Description

DETAILED DESCRIPTION OF THE INVENTION [Field of Industrial Application] The present invention relates to a telephone set that can be connected to 4-wire and 2-wire telephone lines.

[Prior Art] Conventionally, the type of telephone line has been corresponded to by manually switching depending on the telephone line (4-wire or 2-wire type) to be connected.

[Problems to be Solved by the Invention] However, in the conventional example described above, the switch had to be changed each time depending on the number of wires to be connected, so there were the following drawbacks.

(1) For multi-function telephones that are not used in a fixed location, it is necessary to know the type of telephone line at the location and manually switch between them.

(2) In the case of a device that forcibly switches to a 2-wire system when the power of the main exchange, etc. is cut off due to a power outage on a 4-wire telephone line, and at that time, the multi-function telephone (the power is not turned off) If it is in absentee mode (answer mode, etc.), it will not work properly.

[Means for Solving the Problems] According to the present invention, by providing hardware having at least one of a voltage detection function and a serial data analysis function, it is possible to determine whether or not it is connected to a four-wire telephone line. This makes it possible to switch between 4 wires and 12 wires.

[Embodiment] FIG. 1 is a block diagram showing the configuration of a telephone in which the present invention is implemented, in which 1 is a handset for talking and listening;
2 is a receiving/receiving block that carries the voice of the handset 1 on the telephone line, and 3 is a 4-wire data line L3. A reception/transmission block receives and transmits the power supply and serial data coming from L4, and 4 is a control block that controls the entire telephone, and the hardware is compatible with both 4-wire and 12-wire types. 5 is a voltage detection block that detects the power coming on the data lines L3 and L4, and 6 is L3. Power source coming from L4,
7 is data obtained in the reception/transmission block 3.

In the case of a four-wire system, the power supply 6 is supplied and the voltage detection circuit 5 operates to notify the control block 4 that it is a four-wire system. From this point on, the control block 6 sets the hardware and software to a four-wire system. That is, control block 6 connects data lines L3. Detection of a call, etc. is performed in accordance with the data received via the data line L3.L4. Sends a code indicating the calling dialed number via L4. Furthermore, in the case of a two-wire system, since the power supply voltage 6 is not supplied, the control block 4 is assumed to be a two-wire system, and the hardware and software are set to the two-wire system. That is, the control block 6 controls the communication lines Ll, L
ring the bell in response to the call signal received from 2;
A call is made by sending a dial pulse or dial tone to the communication lines Ll and L2.

FIG. 2 shows an environment for explaining the operation of the multi-function telephone of this embodiment. In the figure, 11 is a floor equipped with a 14-wire telephone line, and 12 is a floor equipped with a 2-wire telephone line. , 13a to 13c are 4-wire dedicated telephones, 14 is a 4-wire line terminal, 15 is a 2-wire dedicated telephone, and 16 is a 2-wire telephone.
Wire line terminal, 17 is a 4-wire exchange, 18a
18e is a public line, and 19 is a multifunction telephone implementing the present invention.

Next, in the above configuration, the multifunction telephone 19 is installed on the floor 1.
1 is used as a 4-wire system. However, due to business reasons, I had to move to floor 12, but simply by changing the multifunction telephone 19 from terminal 14 to terminal 16, it automatically became usable as a two-wire system.

"Other Embodiments" FIG. 3 is an example in which the present invention is realized by omitting the voltage detection block 5 in FIG. 1.

To determine whether it is a 4-wire or 2-wire system, if no data comes to the serial data receiving/transmitting block 23, it is a 2-wire system, and if data does come, it is a 4-wire system. The remaining processing of the control block 24 is the same.

[Effects of the Invention] As explained above, the following effects can be obtained by providing the telephone line voltage and serial data detection function.

(1) There is no need to know the line system (4-wire/2-wire system) at the location where the multi-function telephone is used, and the associated manual settings are no longer necessary.

(2) The telephone line connected to the multi-function phone may be affected by external factors (
Even if the line system changes due to a power outage, etc., it can be handled without operator intervention.

[Brief explanation of drawings]

FIG. 1 is a block diagram of a multi-function telephone according to an embodiment of the present invention, FIG. 2 is a usage environment diagram of the multi-function telephone according to an embodiment of the present invention, and FIG.
FIG. 3 is a block diagram of a multifunction telephone according to another embodiment of the present invention. 2 is a receiving/transmitting block, 3 is a serial data receiving/transmitting block, and 5 is a voltage detection block. 8e

Claims (1)

[Claims] 1. A multi-function telephone set comprising a circuit that distinguishes between 4 wires and 12 wires by detecting power supply voltage or control serial data of a 4-wire telephone line.