JPS6331251A - Telephone set - Google Patents

Abstract

PURPOSE:To prevent a busy tone from being emitted from a speaker by stopping the output to the speaker when a remote telephone set is busy at the time of automatically redialling. CONSTITUTION:When the automatical redial key of an input part 1 is operated, a control part 14 transmits the dial number of an address relating to a previous dialling stored in a memory to a line through an interface 17. The interface part 17 monitors a response signal from an exchange through an exchange control channel 18b. The control part 14 analyzes this response signal and detects the busy state of the remote telephone set. When a busy signal is not detected, a sound channel 18a is connected to an informing part 2 through the interface part 17 to turn the speaker 2A on. When the busy signal is detected, the connection to the informing part is stopped. Thereby, when the remote telephone set is busy, the output from the speaker is not carried out, so that the telephone set having no troublesome matter can be obtained.

Description

[Detailed Description of the Invention] [Object of the Invention] (Field of Industrial Application) The present invention relates to a telephone set, and is particularly suitable for a telephone set having an automatic redial function.

2. Prior Art) A conventional telephone set was constructed as shown in FIG. A control section 4 consisting of a microcomputer, switches, etc. includes an input section 1 consisting of dial keys, various function keys, etc., a notification section 2 including a speaker 2A and various LEDs, and a communication section 3 consisting of a handset, etc. is connected.

Further, the control unit 4 is connected to a line 8 via a line interface unit 7. Inside the line interface section 7,
A switch 6 and a dial signal sending section 5 are provided.

In the telephone configured as described above, when a destination dial number is input from the input section 1, the control section 4 receives it, opens the switch 6, and controls the dial signal sending section 5 to send a dial signal. is sent to line 8.

At this time, if the destination telephone is idle and a ringing tone is generated at the destination telephone, a ring pack tone is sent back to the telephone through the line 8. Further, if the destination telephone is in a busy state, the busy messages 1 to 1 are returned to the telephone via the line 8. When the control section 4 detects the busy tone, it usually takes several seconds to detect the busy tone, but it opens the switch 6, stores the destination dial number data, and starts counting a predetermined time.

When it is detected that the predetermined time has elapsed, the control unit 4 repeats the same dialing as the previous time, and repeats the re-dialing until the other party answers or the number of automatic redials reaches the predetermined number.

In the above, when automatically re-dialing, it takes time to detect the busy tone and ringback, so in order to be able to respond immediately to the other party's response, the control unit 4 controls the sending of the dial signal and then connects the line. The audio signal arriving from 8 is controlled to be output to the speaker 2A of the notification section 2. Therefore, if the destination is busy for a long time, a busy tone is emitted from speaker 2A each time an automatic redial is made, and the telephone operator has to play a similar tone for several seconds. .

(Problem to be solved by the invention) As mentioned above, according to conventional telephones, as long as the destination telephone is busy, the busy tone emitted from the speaker must be heard every time automatic redialing is performed. It had the disadvantage of being too frequent. The present invention has been made in view of the drawbacks of conventional telephones, and its purpose is to provide a telephone that does not output from the speaker when the destination telephone is busy, and that does not make noises. That's true.

[Structure of the Invention] (Means for Solving the Problems) The present invention includes a speaker, a detection means for detecting whether the other party's telephone is in a busy state or in an idle state based on a signal arriving from a line. The telephone is equipped with speaker control means for connecting the speaker and the line after the detecting means detects an empty state, and for stopping the monitoring operation of the speaker when the detecting means detects a busy state. It is composed of

(Function) According to the above-mentioned telephone set, whether the other party's telephone set is busy or ringing is determined based on the signal coming from the line rather than the tone, so it can be detected immediately. Therefore, when it is detected that the other party's phone is busy, the output to the speaker is stopped.
A busy tone is not emitted from the speaker even in a busy state during automatic redialing.

(Example) Hereinafter, one embodiment of the present invention will be described with reference to the drawings.

FIG. 1 is a block diagram of one embodiment of the present invention. In this figure, the same components as in FIG. 3 are given the same numbers, and their explanations will be omitted. In FIG. 1, 14 indicates a control section. The control section 14 is composed of a microcomputer, switches, etc., and controls each section, and further performs an automatic redialing operation based on the program shown in the flowchart shown in FIG. 17 indicates a line interface section. The line interface section 17 has voice (or data)
A line (digital) 18 consisting of a channel 18a and an exchange control channel 18b is connected, and the line interface section 17 sends and receives signals under the control of the control section 14.

The automatic redialing operation of the telephone will be described below with reference to the flowchart shown in FIG. First, in the initial state (ST1), when the automatic redial key of the input section 1 is operated, the LED corresponding to the automatic redial in the notification section 2 is turned on (ST2).

Next, the control unit 14 sends the dial number data of the destination related to the previous dialing, which is stored in a memory (not shown), to the line interface unit 17, and controls the sending of the dial signal. Then, the line interface unit 17 sends a dial signal to the digital exchange via the exchange control channel 18b (5T3), and monitors return of a response signal from the digital exchange via the exchange control channel 18b (ST4). When a response signal is sent from the digital exchange, the response signal is passed to the control section 14. Therefore, the control unit 14 analyzes the response signal and detects whether the other party's telephone is in a busy state (ST5). Here, when a signal indicating that the other party's telephone is idle is detected in the response signal, the control section 14 connects the voice (or data) channel 18a and the speaker 2A of the notification section 2 via the line interface section 17. 5T6) and turns on the speaker 2A (Sr7). Further, the control unit 14 detects that the handset goes off-hook in the communication unit 3,
When an off-footer occurs, the call mode is entered (Sr8), and when an on-footer occurs, the call mode is terminated (Sr8).
1).

On the other hand, when a signal indicating that the other party's telephone is in a busy state is detected in the response signal, the process branches from Sr5 to YES, and the control unit 14 sends a disconnection signal from the line interface unit 17 to the exchange control channel 18b (5T10). , turn off the LED indicating automatic redialing of the notification unit 2 (ST1
1). Further, the control unit 14 detects whether automatic redialing has been performed a preset number of times (5T12), and if the predetermined number of times has not been reached, the control unit 14 detects whether automatic redialing has been performed a preset number of times (ST13).
), the process returns to Sr1, and when the predetermined number of times has been reached, the automatic redialing ends (Sr1).

According to this embodiment, when the other party's telephone is busy, the signal of the voice (or data) channel 18a is transmitted to the speaker 2A.
Therefore, during automatic redialing, a busy tone is not emitted every time the dial is busy. When the speaker is activated, the other party's telephone is not in a busy state, so even if the user picks up the handset, the other party's telephone will be called, resulting in good operability.

In this embodiment, the LED indicating automatic redialing is driven separately from the speaker, but it may be driven at the same time. Further, voice signals during a call are transmitted and received via a voice channel, but may also be transmitted and received as a voice packet signal via a data channel.

[Effects of the Invention] As described above, according to the present invention, when the destination telephone is in a busy state, no output is made from the speaker, making it possible to obtain a telephone that does not cause any trouble.

[Brief explanation of drawings]

FIG. 1 is a block diagram of one embodiment of the present invention, and FIG. 2 is a block diagram of an embodiment of the present invention.
A flowchart for explaining the operation of one embodiment of the figure,
FIG. 3 is a block diagram of a conventional telephone. DESCRIPTION OF SYMBOLS 1... Input part, 2... Notification part, 2Δ... Speaker, 3... Call part, 14... Control part, 17.
...Line interface section, 18...Line, 18a...Voice (or data) channel, 18b...
- Switch control channel. Agent Patent Attorney Book 1) Takashi Figure 1 Figure 3

Claims (1)

[Claims] a speaker for monitoring signals on the line; a detection means for detecting whether the other party's telephone is in a busy state or an idle state based on a signal arriving from the line; 1. A telephone set, comprising speaker control means for connecting a speaker to the line, and for stopping a monitoring operation of the speaker when the detection means detects a busy state.