JPH03112293A - Home use simple exchange - Google Patents

Abstract

PURPOSE:To prevent the exchange from being left busy by stopping the supply of a current to a telephone set and releasing on-hook dial state when the state of on-hook and other state than the busy state are consecutive for a prescribed time or over. CONSTITUTION:When a telephone set B applies on-hook dialing and other state than the busy state is consecutive for a prescribed time, the a function of stopping the supply of a current from a feeding circuit 7 to the telephone set B for a prescribed time and releasing the on-hook dial state of the telephone set B is provided to an arithmetic control circuit. Thus, even when the operation after on-hook dialing is left unreleased, the exchange is not kept busy.

Description

DETAILED DESCRIPTION OF THE INVENTION [Industrial Application Field 1] The present invention is directed to a home-use phone that switches and forms communication paths between an outside line and an internal line or between internal lines so that external calls and internal calls can be made using a plurality of commercially available telephones. This is a great example of a simple exchange device.

[Prior Art] In conventional telephone systems that allow extension calls, a dedicated telephone designed according to the main unit is used as an extension telephone. However, there is a complaint that this does not allow the user to freely select the design, functions, etc. Therefore, simple exchange device type telephones have been provided that can be freely connected to general commercially available telephones, such as so-called black telephones with only basic functions, multi-functional design telephones, etc., according to the user's preference. .

This simple home switching device can be used to make extension calls, put calls on hold, etc. using dial signals input from the telephone using dial pulses or button tones, just as it can be operated using the above-mentioned black telephone. ing.

FIG. 1 is a diagram showing the circuit configuration of the telephone exchange of the above-mentioned household simple switching device, in which telephone exchange A is connected to a central telephone office via external telephone line #i11, which is a public telephone line, and internal telephone exchange fiA is connected to telephone exchange fiA. Commercially available telephones connected with eiu2! (
(not shown)
(The communication path between ' I and internal #1112 or internal #X e 2 is switched and formed so that external and internal calls can be made using the above telephone ff1B.In addition, with this simple home switching device, The door phone C is connected to the telephone exchange fiA via the telephone line 1, and the door phone call can also be made using the telephone fiB.

[Problem to be Solved by the Invention 1] By the way, some recent telephones B are equipped with an on-hook dialing function that allows dialing while the handset is on the hook.

By using the telephone ff1B equipped with this on-hook dialing function, there is no need to hold the handset while calling the other party, so it is convenient to be able to perform other tasks while the call is being made. Then, when the phone WB's built-in speaker emits that the other party has answered, it is designed to pick up the handset and make a call. There is a telephone used in the above-mentioned household simple switching device.

However, if you use telephone B equipped with such an on-hook dialing function, you may accidentally press the switch for on-hook dialing, or you may leave your seat and forget about on-hook dialing while it is calling the other party. It happens that something happens. In this case, the telephone line remains connected and goes into a busy state, making it impossible to receive calls from outside.

Moreover, since it is difficult to find the device in this state, there is a problem in that it is often left as it is.

The present invention has been made in view of the above-mentioned points, and its purpose is to provide a simple switching device for home use that can prevent users from forgetting to release the on-hook dial and ending up in the middle of a call. It is about providing.

[Means for Solving the Problems] 4. In order to achieve the above object, the present invention provides an on-hook dialing operation using a telephone, and when the on-hook state other than the telephone call continues for a certain period of time or more, the power supply circuit A release means is provided for stopping the supply of current to the telephone for a predetermined period of time to release the telephone from the on-hook dialing state.

[Operation J] By having the above-described configuration, the present invention automatically cancels the on-hook dialing function when on-hook dialing is performed and the call continues to be stopped and not performed for a certain period of time. This prevents the device from remaining in the busy 1 state.

[Example 1 An embodiment of the present invention is shown in FIGS. 1 to 4.

As shown in FIG. 1, the household simple exchange device of this embodiment is capable of connecting a plurality of telephones tfiB and door phones C to the exchange A, and this exchange fiA is roughly connected to the incoming call detection circuit 1. , a holding circuit 2, a call control circuit 3 that switches the call path, a doorbell call interface 4 that controls calls between doorphone C and telephone B, and a CPU that controls the operation of each of the above circuits. It consists of 5.

Here, although the original configuration of the household simple switching device according to the present invention is more complicated than that shown in FIG. 3, only the main configuration is shown to simplify the subsequent explanation. Here, to briefly explain the processing contents performed by the arithmetic control circuit 5, as shown in FIG. Initialization function (for example, initialization of I10 memory, initialization of interrupt timer, etc.), dial signal,
Input processing functions related to reading doorphone signals, etc. (hook ON10 FF processing, dial input processing, outside line incoming processing, doorbell ringing processing, etc.), output processing functions related to switching operation of call control circuit 3, voice or display control, etc. It is equipped with

As shown in FIG.
It is equipped with an analog switch 6 that switches and forms a communication path between + and inner m 12 or inner #l 12 and the communication line 13 of door phone C, and a power supply circuit 7 that supplies operating current to telephone fiB, and telephone fiB. A capacitor C that transmits only the audio signal of 1 to the analog switch 6, a relay RY+ that controls the power supply state from the power supply circuit 7 to the telephone B according to the output of the arithmetic control circuit 5, and a relay RY+ that controls the state of the telephone B and the telephone f.
A hook/DP detection circuit 8 for detecting dial pulses (DP) input from the iB is provided for each extension 12.

Now, when a dial signal is input from the telephone fiB, this dial signal is detected by the 7-tsuku/DP detection circuit 8 and sent to the arithmetic control circuit 5, and the arithmetic control circuit 8 makes an outside line call based on the number of digits of this dial signal. If it is an outside line call, the input dial signal is sent to the outside line II, and then the analog switch 6 connects the internal line #it a 2 to the outside line 11 to make an outside line call. is possible. Here, if the dial signal input from telephone aB is a single digit dial signal that specifies another telephone 1flB, the called telephone B is made to perform a ringing operation, and the handset of telephone B is picked up. and,
Extensions 12 to which one and both telephones fiB are connected are connected to each other by an analog switch 6 to enable extension calls. Although not explained in detail, each call process is assigned to a dial number input from the phone fiB so that other call processes such as holding can also be performed using the dial signal input from the phone fiB. Furthermore, when there is a call from door phone C, this call is called as door phone call in, f-7
ACE 4 detects the call, and in response to this call, the arithmetic control circuit 5 causes each telephone B to make a doorphone call, and in response to the call, the analog switch 6 forms a communication path between the telephone B and the doorphone C, whose handset was picked up. Thus, a doorphone call can be made using telephone set B.

When an outside call arrives, the incoming call is detected by the incoming call circuit 1, and at this time the arithmetic control circuit 5 causes each telephone fiB to perform a calling operation.
When the handset of telephone fiB is picked up, the analog switch 6 switches the connected extension I2 of that telephone fiB.
An outside line l is connected to the terminal to enable outside calls.

8- Below, the essential parts of this embodiment will be explained. It should be noted that even when the telephone 1fIB is operated for on-hook dialing, external line calling operations, internal line calling operations, etc. are performed in the same manner as in the above case. Now, if we consider a situation where the telephone fiB is left in the on-hook dialing state, there are the following cases.

1) I made a call to the extension number, but the other party did not answer.

2) The extension call has ended and the other party has their handset on hook.

3) When you make an outside line, but the other party does not answer or is busy.

4) The outside line call has ended and the other party has put their handset on hook.

Note that all of these states apply to the condition "other than one call in progress". Therefore, in this embodiment, when an on-hook dialing operation is performed by telephone B and the state other than the on-hook state during a call continues for a certain period of time or more, the supply of current from the power supply circuit 7 to telephone B is stopped for a certain period of time. hand,
The arithmetic control circuit 5 is provided with the function of canceling the on-hook dialing state of the telephone 1fiB. If you do this,
Even if you forget to release the on-hook dial after dialing, which is a problem in the past, there is no chance that the call will remain busy. , 70-chart showing the operation of the arithmetic control circuit 5 of 2 is shown in FIG.

In addition, "1 entry 1) = 4. ) situation for a certain amount of time (
For example, a period of several seconds to one minute) occurs under normal conditions, so the on-7 knock dial should be canceled at least once this period of time has elapsed. Note that the telephone 8!13 equipped with the on-7 dial function is designed to not return to the standby state unless the power supply to the telephone 0 is stopped for a certain period of time. for a certain period of time (for example, 5
(about 1 second) to stop the power supply. Then, when the on-hook dial state is released, the normal on-hook state returns. Furthermore, it must be noted that in the situation ``1.3L4), telephone exchange A needs to have a function to identify that the other party is not answering or that the other party is on-hook.

Effects of the Invention As described above, according to the present invention, when the on-7 dial operation is performed using a telephone, and in the on-7 dial state, jm busy 1:J,
If the outside condition continues for a certain period of time, the power supply circuit stops supplying the operating current to the telephone for a certain period of time and releases the telephone from the on-7-knock dial state. , On 7 nok dial is done and the call is -
Time 1: J, I- If the state of not being performed continues, the On 7 Knok Dial function can be automatically canceled to prevent it from remaining in the Busy 1 state. .

[Brief explanation of drawings]

tjtJ1 is a circuit diagram of a telephone exchange according to an embodiment of the present invention, FIG. 2 is a sandwich circuit diagram of the same call control circuit, and FIG. FIG. 4 is an explanatory diagram showing the processing operation of the arithmetic control circuit same as above. A is a telephone exchange, 1 momme is a telephone, el is an outside line, 12 is an extension line, 5 is an arithmetic control circuit, 6 is a call control circuit, and 7 is a power supply circuit.

Claims (1)

[Claims] (1) A telephone exchange connected to a telephone office via an outside line;
It is composed of commercially available telephones each connected to this telephone exchange by an extension line, and the telephone exchange switches and forms a communication path between an outside line and an extension line or between extension lines, so that outside line calls and internal calls can be made with the above telephone set, and the above telephone exchange In a simple home switching device using a device equipped with an on-hook dialing function that allows dialing while the handset is on-hook, the on-hook dialing operation is performed by the above-mentioned telephone, and the state other than the on-hook state is constant. A household simple switching device equipped with a release means that stops the supply of current from a power supply circuit to a telephone for a certain period of time and releases the telephone from an on-hook dialing state if the current continues for more than a certain period of time.