JPS63217795A - Key telephone system - Google Patents

Abstract

PURPOSE:To connect a single telephone set, a facsimile, an automatic answering telephone set or the like to a central office line with a simple constitution by connecting the terminal of the facsimile or the like to the central office line of the push button telephone set in a main device through a relay turned off during the use of the push button telephone set. CONSTITUTION:Under an ordinary state, relay contacts 10, 11 are turned on, and the terminals 2, 3 are operated to capture the central office lines L1, L2. At the time of capturing the central office lines, a current passes to detecting means 6, 7 from the central office lines L1, L2 and it is detected in the detecting means 6, 7. The detecting information is transmitted to the push button telephone sets 4, 5 by the microprocessor 12 of the main device 1 and displayed. At the same time, the central office lines L1, L2 cannot be captured by the push button telephone sets 4, 5. At the time of operating the push button telephone sets 4, 5 and capturing the central office lines L1, L2 under the ordinary state, the information is transmitted to the microprocessor 12 from the telephone sets 4, 5 to operate the relays 8, 9. Accordingly, the relay contacts 10, 11 are turned off, the terminals 2, 3 are separated from the central office lines L1, L2 and the central office line in the terminals 2, 3 cannot be captured.

Description

[Detailed Description of the Invention] Prior Art 2t/-/ Generally, a button telephone device is systemized with a main device and a plurality of button telephones connected to it, and requires a separate telephone, answering machine, fax machine, etc. In this case, it is not possible to connect these directly to the main device instead of a key telephone. Therefore, conventionally, when these are required, a separate central office line is drawn in and a stand-alone telephone, answering machine, etc. are connected to it.

Problems to be Solved by the Invention Therefore, in this type of system, it is necessary to separately pay basic call charges to the telephone office in order to connect a separate central office line.
Furthermore, construction work had to be done separately, which was extremely inconvenient.

The present invention eliminates the above-mentioned conventional drawbacks, and connects a standalone telephone, fax machine, answering machine, etc. to a central office line for a key telephone housed in the main device via the main device with a simple configuration. The purpose of this invention is to provide an excellent key telephone device that can be used.

Means for Solving the Problem 3' The present invention provides a main device with a terminal for connecting a terminal such as a standalone telephone or a fax machine, and connects this terminal to the button telephone via a relay contact that turns off the button telephone when the button telephone is in use. If a separate telephone, fax, etc. is connected to the above-mentioned terminal, it is configured so that it is connected to the above-mentioned office line, and the above-mentioned independent telephone is connected to the central office line housed in the main unit. A means for detecting when a telephone, fax, etc. captures the above-mentioned office line is provided, and the output of the detection means is configured to notify and display on each button telephone that the above-mentioned office line has been captured. It is.

Therefore, according to the present invention, a central office line housed in the main device for a key telephone can be used as it is for a standalone telephone, a fax machine, or an answering machine, and furthermore,
It has the effect that the same central office line can be effectively separated and used for separate telephones, fax machines, answering machines, and other top-button telephones without mutual interference.

The embodiment diagram is a schematic configuration diagram of an embodiment of the button telephone device of the present invention. In the figure, 1 is the main device that accommodates the office lines L1 and L2, 2.3 is the terminal T1 provided in the main device 1,
Terminals such as a standalone telephone, fax, and answering machine connected to T2, 4.5 a button telephone, and 6.7 a photocoupler that detects when the terminal 2.3 captures the central office line 4 and L2, respectively. 8.9 is a relay that is always inactive and operates when the button telephone 4.5 is in use; 10.1 is a relay contact of the relay 8.9, and 12 is a relay contact of the button telephone 4.5. It is a microprocessor that exchanges information with the terminal 2.3 and operates as a so-called button telephone device, and at the same time, the output of the detection means 6.7 causes the key telephone 4.5 to transmit information to the terminal 2.3.
It has a function to notify that the key telephone 4.5 has captured the central office lines L1 and L2, thereby prohibiting calls from the key telephone 4.5, and relay 8.9 when the key telephone 4.5 is in use. It has the ability to operate.

51.7 In the above embodiment, under normal conditions, the relays 8.9 are in an inactive state, and their relay contacts 10.11 are in an on state, respectively. Therefore, in this state, terminal 2.
3, it is possible to capture the station lines L1 and L2. Now, terminal 2.3 is connected to the central office line L1, L.

If the detection means 6 and 7 capture the station line 7,
A predetermined current flows from ,L, and is detected by the detection means 6.7. Then, since it is transmitted to the microprocessor 12, the microprocessor 12 uses the central lines L1 and L2.
All buttons on the phone 4.5
to be transmitted. The button telephones 4.5 receive the above information from the microprocessor 12 and display the central telephone line 1,
Indicates that L2 has been captured. At the same time, even if the key telephone 4.5 captures the above-mentioned office lines 7 and L2 and attempts to make a dial call, control is performed so that the above-mentioned office lines L1 and L2 cannot be captured.

On the other hand, when the key telephone 4.5 is operated under normal conditions and the central office line 7, L2 is captured, the information is transmitted from the 6"-key telephone 4.5 to the microprocessor 12 of the main device 1. Processor 12 is relay 8.9
put it into operation. Therefore, in this case, the relay contact 10.11 is turned off and the terminal 2.3 is disconnected from the central line 4, L2, making it impossible for the terminal 2.3 to capture the central line.

In this way, according to the above embodiment, the central office line housed in the main device 1 for a button telephone can be used as it is for terminals such as stand-alone telephones, fax machines, answering machines, etc., and while the button telephone is in use, the terminal can be This has the advantage that each button telephone can be disabled and automatically switched between them in an efficient manner.

Effects of the Invention As is clear from the embodiments described above, the present invention has a simple configuration that allows the addition of terminals such as a stand-alone telephone, fax machine, answering machine, etc., and furthermore, does not cause mutual interference with key telephones. This is extremely advantageous in practice because it can be automatically switched and used without any trouble.

7'-

[Brief explanation of the drawing]

The figure is a schematic diagram of an embodiment of the button telephone device of the present invention. Ll, L2...Station line, 1...Main device, 2.3...
Terminal, 4.5... Button telephone, 6.7... Detection means, 8.9... Relay, 10, 11... Relay contact, 12... Microprocessor.

Claims (1)

[Claims] The main device is provided with a terminal for connecting a terminal such as a standalone telephone or fax, and this terminal is connected to the central office line housed in the main device for the button telephone via a relay contact that turns off when the button telephone is in use. The main device is configured such that the terminal can capture the central office line by connecting the terminal to the terminal, and means for detecting when the terminal captures the central line is provided in the main device. The button telephone device is configured to notify and display on the button telephone that the central office line is captured by the terminal based on the output of the detection means.