JPH0537613A - Telephone system - Google Patents

Abstract

PURPOSE:To avoid trouble from being given due to mis-calling from a non-voice terminal equipment without giving a sense of disorder to a telephone caller. CONSTITUTION:A calling tone (CNG) and a busy tone are detected respectively from a telephone line in the hook-on state, and when the CNG is not detected within a prescribed time after line connection, a tone ringer rings and a ring back tone is sent till the prescribed time elapses in the line to be connected. On the other hand, when the CNG or the busy tone is detected from the line subjected to connection processing, the line interrupt processing is processed. While mis-calling from a non-voice terminal equipment is rejected selectively to keep the non-ringing state of the tone ringer, the tone ringer rings to the call from a telephone set terminal after the transmission of the ring back tone for a prescribed time to inform the incoming call to the user.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a telephone device used by connecting to a general subscriber telephone network.

[0002]

2. Description of the Related Art As shown in FIG. 3, a conventional device of this type includes a hook switch 1, a tone ringer 2, a communication circuit 3, a handset 4, a dial transmission circuit 5, and a numeric keypad 6 for dial operation. In this case, the tone ringer 2 is always connected to the line L in the hook-on state, and when the call signal of 16 Hz is received, the ringer immediately rings to give an acoustic notification of the incoming call (for example, issued by the Telecommunications Association). "To understand the NTT communication network" 99
~ Page 134).

[0003]

However, according to such a configuration, there is a problem that the user is often troubled by an erroneous call from a non-voice terminal such as a facsimile.

The above-mentioned problems occur for the following reasons. That is, recently, in addition to telephone terminals, many non-voice terminals such as facsimiles and personal computers have been connected to the subscriber telephone network. Along with this, the user of the telephone device is often troubled by the ringing of the tone ringer due to an erroneous call from the non-voice terminal.

Further, many of the non-voice terminals described above repeatedly perform a dial call operation by the auto redial function until communication is established. When a telephone device receives a call from a non-voice terminal having such a function, the user of the telephone device is repeatedly troubled by the same wrong call.

The present invention has been made in view of the above-mentioned problems, and it is possible to eliminate the inconvenience of a user due to an erroneous call from a non-voice terminal without giving a feeling of discomfort to the calling side of the telephone. The purpose is to provide a device.

[0007]

SUMMARY OF THE INVENTION In order to solve the above problems, the present invention uses a telephone line in a hook-on state to connect CNG.
(Calling tone) and busy tone are detected respectively, the tone ringer is activated when CNG is not detected within a certain time after the line is connected, and until the above-mentioned certain time elapses for the line being connected. While the ringback tone is transmitted, the line is disconnected when the CNG or the busy tone is detected from the connected line.

[0008]

According to the present invention, by the above-mentioned configuration, the false call from the non-voice terminal can be selectively rejected to keep the tone ringer in the non-ringing state. After the ring back tone is sent, the tone ringer is activated to notify the user of the incoming call, so the calling side of the telephone does not feel uncomfortable and the user is bothered by an erroneous call from a non-voice terminal. It is possible to eliminate the problem.

[0009]

Embodiments of the present invention will be described below with reference to the drawings.

In the figures, the same reference numerals indicate the same or corresponding parts. FIG. 1 shows a schematic configuration of a telephone device according to an embodiment of the present invention, in which 1 is a hook switch, 2 is a tone ringer, 3 is a communication circuit including a hybrid, 4 is a handset, 5 is a dial transmission circuit, 6 is a numeric keypad for dial operation, 71 is a call detection circuit for detecting a call signal of 16 Hz from the telephone line L in the hook-on state, and 72 is a CNG (calling tone) generated by a non-voice terminal such as a facsimile. CNG detection circuit 73 detects the CNG detection circuit 73, a detection circuit 73 detects a busy tone emitted from the exchange when the calling side performs line disconnection processing, and 74 a handset 4
Circuit for detecting whether or not the hook switch 1 is in the hook-off state by a pick-up operation or the like, 81 is a ring back tone sending circuit for sending a ring back tone to the telephone line L in a pseudo manner, and 9 is a part of each part. It is a control circuit that centrally controls the operation.

Here, the control circuit 9 is a general-purpose control device in the form of a microcircuit, a so-called micro computer (CP).
U) and is equipped with the following control functions in addition to the control functions for realizing the normal operation of the telephone device.

That is, (1) a control function for performing the connection processing of the line L in the hook-on state when a call signal of 16 Hz is detected, and (2) the above CNG from the line L subjected to the connection processing within a fixed time. The control function that sounds the tone ringer 2 when it is not detected, and (3) L being connected
A control function for sending a ringback tone to the line until the fixed time has passed, and (4) a control for disconnecting the line L when the CNG or the busy tone is detected from the line L that has been connected. Functions and are installed.

The operation of the telephone device configured as described above will be described below. FIG. 2 is a flowchart showing an outline of the operation of the main part of the telephone device shown in FIG. 1. First, when a call signal of 16 Hz is detected from the telephone line L in the hook-on state, that is, the standby state, The telephone line L is subjected to connection processing (promotion processing) in the hook-off state. Then, a ringback tone is pseudo-transmitted to the telephone line L on which the connection processing is performed.
At this stage, the tone ringer 2 remains silent.

When CNG is detected within a fixed time after the connection processing of the telephone line L is performed, the disconnection processing of the telephone line L is performed and the initial standby state is restored.

On the other hand, if the CNG is not detected within the fixed time, the tone ringer 2 is activated for the first time to give an acoustic notification that the incoming call has arrived.

However, when a busy tone is detected from the connected telephone line L, the ringing of the tone ringer 2 is stopped and the line is disconnected.

Further, when the hook-off state is detected during the incoming call notification by the tone ringer 2, the ringing of the tone ringer 2 is stopped, and the line L is kept connected until the call is possible.

As described above, it is possible to selectively reject an erroneous call from a non-voice terminal and keep the tone ringer in a silent state. On the other hand, for a call from a telephone terminal, the tone ringer is activated. An operation is performed to notify the user of an incoming call. This makes it possible to eliminate the user's annoyance due to an erroneous call from a non-voice terminal. Also, for a certain period of time for detecting the presence / absence of CNG, a ringback tone indicating that a call is being made is sent to the telephone terminal on the calling side in a pseudo manner, which gives the calling side of the telephone a feeling of strangeness. Nor.

[0019]

As is apparent from the above description, according to the present invention, CNG and busy tone are respectively detected from a telephone line in a hook-on state, and CNG is not detected within a certain time after the line is connected. Ring tone to the connected line until the fixed time elapses, while disconnecting the line when the CNG or busy tone is detected from the connected line. By doing so, it is possible to selectively reject an erroneous call from a non-voice terminal and keep the tone ringer in a non-ringing state, while sending a ringback tone for a certain period of time for a call from a telephone terminal. Later, the tone ringer sounds to alert the user of the incoming call, which may cause the calling party of the telephone to feel uncomfortable. No, it is possible to eliminate the trouble of the user due to erroneous calls from non-voice terminal and has the effect that.

[Brief description of drawings]

FIG. 1 is a schematic configuration diagram of a telephone device according to an embodiment of the present invention.

FIG. 2 is a flowchart showing a schematic operation of a main part of the apparatus shown in FIG.

FIG. 3 is a schematic configuration diagram of a conventional telephone device.

[Explanation of symbols]

 L telephone line 1 hook switch 2 tone ringer 3 call circuit 4 handset 5 dial transmission circuit 6 numeric keypad 71 ring detection circuit 72 CNG detection circuit 73 busy tone detection circuit 74 hook-off detection circuit 81 ringback tone transmission circuit 9 control circuit

Claims (1)

[Claims] 1. A means for detecting a ringing signal from a telephone line in a hook-on state, a means for performing line connection processing in the hook-on state based on the detection of the ringing signal, and a CNG (calling tone) from the line. ) And a busy tone are respectively detected, a means for ringing a tone ringer when the above CNG is not detected within a fixed time from the connected line, and the above fixed time has elapsed for the connected line. A telephone device having means for transmitting a ringback tone until the above, and means for disconnecting the line when the CNG or the busy tone is detected from the connected line.