JPH01180175A - Designated terminal switching device - Google Patents

Abstract

PURPOSE:To allow only a terminal set connected to an information equipment loop to function calling by sending a call signal only when a detected termination designation code is not registered. CONSTITUTION:A call signal of a terminal set I is detected by a detection section 2 and inputted to an input section 1d of a control section 1, driven by a DC loop 3, a voice synthesis IC 4 and an output section 1e, a trunk line is closed and a reply message from the IC 4 is sent to the caller via the loop 3 and a terminal 11. The control section 1 reads a code data registered and not in use to an arithmetic unit 1a and when it is not coincident with the code data from the caller written in the RAM 1b, a relay A is turned on based on the code data, and when the terminal set I is designated, a corresponding relay B is energized, a call signal from a call signal generating section 6 calls the terminal set I via a reply deciding section 7, a changeover contact (a), changeover contact (b) of the relay B corresponding to the designated terminal set I and a terminal 12.

Description

Detailed Description of the Invention (Industrial Application Field) The present invention relates to a designated terminal switching device that configures a line by designating one of a plurality of terminal devices. Select and use to connect.

(Prior art) In recent years, information devices have become increasingly sophisticated, and the way they are used is to selectively connect one of a plurality of information devices using a single central office line. A conventional designated terminal switching device that specifies and selects an information device for this purpose as a terminal is configured to mechanically make a designated call regardless of whether the designated terminal is connected or not.

(Problem to be solved by the invention) Therefore, even if a designated call is made to an unconnected terminal, the call will be made to that terminal and the ringing tone will be sent to the caller. had a problem in that it did not notice at all that a specified call was made to an unconnected terminal.

SUMMARY OF THE INVENTION In view of the above-mentioned conventional problems, it is an object of the present invention to provide a designated terminal switching device in which a calling operation functions only for terminals connected to an information equipment loop.

(Means for Solving the Problems) The present invention achieves the above object by transmitting a response message to a caller in an information equipment loop that enables the exchange of signals with a plurality of terminal devices via one central office line. means for detecting a terminal designation code sent by a calling party; unused terminal code setting means for registering and setting an unconnected terminal; and calling signal sending means for sending a calling signal to a designated terminal. and only when the terminal designation code detected by the terminal designation code detection means is not registered as an unused terminal device in the unused terminal code setting means,
This is achieved by having the above-mentioned calling signal sending means send out a calling signal.

(Function) According to the present invention configured as described above, even if a terminal is designated and receives a call by an unused terminal code registered and set in advance, the call is ignored and only the connected terminal is contacted. Selectively connected.

(Example) Hereinafter, the present invention will be explained in detail by way of an example using the drawings.

FIG. 1 is a block diagram showing the configuration of an embodiment of the present invention. Reference numeral 1 denotes a control section configured by a microcomputer, including an arithmetic section 1a, a RAM (random access memory) lb, and a ROM (read only memory) 1c. , an input section 1d, an output section 10, and the like. 2 is a ringing signal detection unit; 3 is a DC loop unit controlled by the control unit 1 for answering the station line and holding the station line; 4 is a voice synthesis IC in which a response message is registered; 3 is a terminal designated by the caller; A control signal detection section 6 detects a code and an unused terminal code issued from a terminal. A call signal generation section 6 sends out or stops a call signal under the control of the control section 1. Further, 7 is a response determination unit of a call designated terminal, and 8, 9, and 10 are terminals! .

■ and ■ loop monitoring units (not shown); ■1 is the office line connection terminal; 12. 13 and 14 are the terminal connection terminals.

Connect terminals I, ■, and ■, respectively. Also, A.

B, C, and D are relays, and a, b, c, and d are switching contacts of each of the above relays.Switching contact a of relay A connects the route of each terminal t, u, and it to a central office line or a response determination unit. Switch to the 7 side.

The designated terminal switching device of the present invention configured as described above operates as follows.

That is, FIG. 2 is a flowchart explaining the operation. First, the switching contacts a, b, c, and d of relays A, B, C, and D are in the state shown in FIG. 1 in a steady state.

In this state, for example, when the terminal I is called, the calling signal is detected by the calling signal detection unit 2, and the control unit 1 constantly monitors the input of the detection output (FIG. 2, S (step) 1). is applied to the input section 1d of. As a result, the DC loop unit 3 and the voice synthesis IC 4 are driven by the output unit 1e, the office line is closed (S2), and the response message recorded in the voice synthesis IC 4 is connected to the DC loop unit 3 and the office line connection terminal 11. The message is then sent to the calling party (S3).

During the sending of this response message, the control unit 1 uses the voice synthesis IC
4 (S4), and when a signal detecting the end of the response is applied to the human power section 1d, it enters a control signal human power waiting state, and the control section 1 stores the caller's output in the RAM 1b, which is a control signal storage section. writing of control data, that is, terminal designation code data, and monitoring the elapse of 10 seconds (S5
．． S6).

When a terminal designation code is sent from the caller as control data while waiting for the control signal manual input, the control signal detection unit 5 inputs the code data to the manual input unit 1d and writes it into the RAM 1b of the control signal storage unit. Let it happen. Here, the control unit 1
The code data of the registered and unused terminal stored in M1b is read out to the calculation unit 1a (S8), and it is checked whether it matches the code data from the caller written in the RAM1b. Check (S9), and if they match, the control unit 1 ignores the sent terminal designation code data and enters the control signal input waiting state again.

If the code data do not match in the above, relay A is turned on from output section 1e based on the code data (SIO), and if terminal ■ is specified, relay B corresponding to it is turned on. Toshiki 511),
The calling signal from the calling signal generating section 6 passes through the response determining section 7, the switching contact a, the switching contact b of the relay B corresponding to the designated terminal I, and the terminal connection terminal 12, and then the designated terminal I is connected. be called. While the calling signal is being output, the control unit 1 monitors whether the response determination unit 7 responds (S
13) and monitors the passage of 30 seconds (S1
4) When a signal indicating that there is a response is input to the human power section 1d, the sending of the calling signal from the calling signal generating section 6 is stopped, relay A is turned off (S15.516), and the DC loop section 3 is turned off. By turning off the central office line, the caller and designated terminal! It is opened for any call (including data exchange, etc.) (S7).

On the other hand, if the signal indicating that there is a response is not input from the response determining section 7 to the input section 1d even after 30 seconds have elapsed since the output of the calling signal, the control section 1 stops sending out the calling signal (S17
), relay A off (818), relay B off (S
19), the calling operation is completed and the central office line is released (
87).

In addition, in the control signal waiting state, if the caller does not send an unspecified end code after 10 seconds have passed after sending the response message, the central office line is released (SS, S7).
) return to steady state. Furthermore, although the above explanation has been made using terminal I as an example, it goes without saying that the same procedure can be applied to other terminals (2) and (2).

In the configuration shown in FIG. 1, setting of an unused terminal and making a call to an outside line are performed as follows.

That is, FIG. 3 shows a flowchart for setting an unused terminal, and in the steady state of FIG. 1, when the hook switch is turned on due to off-hook due to the handset being raised in the summer, for example, the detection output of the constant loop monitoring units 8 to 10 (S'1) The output of the loop monitoring section 8 is detected by the control section 1 which monitors the loop monitoring section 8, and the detected output is applied to the input section 1d. As a result, output section 1e turns on relay A (S'2), and then relay B corresponding to designated terminal I is turned on (S'3), waiting for the input of a dial signal and an unused terminal setting code. become a state.

In this state, when "0" is dialed from the terminal 1 (S" 4), a signal indicating that a diamond signal has been input is sent from the control signal detection section 5 to the control section 1, which is constantly monitoring the input.
is applied to the input section 1d, and relay A is turned off (S
'5) The central office line and terminal I are connected, making it possible to make calls and make calls to outside lines.

On the other hand, in the state of waiting for control signal human input, for example, if an unused terminal setting code is sent from terminal l (S'6),
The unused terminal setting data is written to the RAM 1b of the storage means (S'7), relay B is turned off (S''8), and relay A is turned off (S'5) to return to the steady state.

Although the present invention has been described above, dial frequency signals can be used for end-undesignated codes and the like.

It goes without saying that terminals other than those mentioned as examples in the operation description operate in exactly the same manner.

(Effects of the Invention) As is clear from the detailed explanation above, the present invention allows the setting of unused terminals easily, and only when the calling party connects and selects the terminal in use. It is possible to call it, and the registration setting data of unused terminals is
It is valid only when the registered device is selected from the outside, and is irrelevant in other cases, so even if you simply connect the phone to a device that is set to register as an unused device,
This has the effect of making it possible to make a call from that phone or setting an unused terminal code.

[Brief explanation of the drawing]

FIG. 1 is a block diagram showing the configuration of an embodiment of the present invention, and FIGS. 2 and 3 are flowcharts for explaining the operation of FIG. 1. 1...Control unit, 2...Call signal detection unit, 3...
- DC loop unit, 4... Voice synthesis IC1, 5... Control signal detection unit, 6... Calling signal generation unit, 7... Response determination unit, 8, 9.10... Loop monitoring unit , 11...
Office line connection terminal, 12゜13, 14...terminal connection terminal,
A, B, C, D... Relay. Patent applicant Matsushita Electric Industrial Co., Ltd.

Claims (2)

[Claims] (1) In an information equipment loop that enables the exchange of signals with multiple terminal devices via a single office line, a means for sending a response message to a caller and detection of a terminal designation code sent by the caller. means, an unused terminal code setting means for registering and setting an unconnected terminal device, and a calling signal sending means for sending a calling signal to the designated terminal device, and the terminal device is detected by the terminal designation code detecting means. A designated terminal characterized in that the designated terminal is configured to cause the calling signal sending means to send out a calling signal only when the terminal specifying code is not registered and set as an unused terminal device in the unused terminal code setting means. Switching device. (2) Claim (1) characterized in that when a central office line is connected to a terminal device registered as an unused terminal device, it is possible to make a call from the terminal device and to set an unused terminal code. Specified terminal switching device as described.