JPH0149226B2 - - Google Patents

Description

[Detailed Description of the Invention] Industrial Application Field The present invention includes means for detecting a dial tone from a line, and has a function of interrupting transmission of a dial signal until a dial tone from the line is detected. This relates to a telephone set.

Conventional technology Generally, when trying to make a call to an outside line from a local telephone such as a PBX, first dial "0",
After the caller hears and confirms that the dial tone indicating that the line has been captured has returned, it is necessary to operate subsequent dial operations to send a dial signal. Conventionally, in order to eliminate the inconvenience of the caller having to check the dial tone, a pause key was provided, and when they wanted to make a call to an outside line, they could press "0" and then "pause," and the dial tone would automatically change. Activating the means for detecting the dial tone, the telephone memorizes the dial even if the caller continues to operate the dial, and after the dial tone detecting means detects the dial tone,
A method is known for automatically sending out a memorized dial. In such a method, if ambient noise or the like enters the line from the transmitting system during dial tone detection, it will interfere with dial tone detection, so it is common to mute the transmitting system.

Problems to be Solved by the Invention In such a conventional example, if the pause key is accidentally operated during a call, the telephone mutes the transmitting system to detect the dial tone, so the user cannot hear the other party's voice. However, the problem was that the person on the other end could not hear my voice, and since there was no dial tone, this state continued indefinitely, and I ended up having to go on-hook. Furthermore, in this case, it is not common knowledge for the user that the transmitting system is muted when the pause key is pressed, so the user may feel anxious that the telephone has malfunctioned. Ta.

Furthermore, by operating the "0" and "pause" keys, while the dial tone detection means is detecting the dial tone from the line, the level of the dial tone is extremely insufficient for some reason, and the dial tone detection means is detecting the dial tone from the line. If the detection conditions cannot be satisfied, the transmitting system remains muted and subsequent dials are not transmitted, and the only way to recover is to turn on-hook.

Also, as a redial function or automatic dial function, pause status can be stored in the same way as dial information, such as "0", "pause", "1", "2".
"3", "1", "2", "3", "4" are memorized, and when a call operation is performed, "0" is automatically sent, and then the dial tone detection state is entered and when a dial tone is detected. Subsequent dials “1” and “2”
A telephone with a function of automatically transmitting ``3'', ``1'', ``2'', ``3'', and ``4'' in sequence also had the same drawbacks as above.

Means for Solving the Problem In order to solve this problem, the present invention provides control that interrupts the transmission of dial signals until a dial signal from the line is detected, and puts the transmitting system in a mute state, according to the data of the pause key. and a pause release means for instructing the continuation of transmission of the dial signal and cancellation of the mute state of the transmitting system, which has been interrupted by the control means.

Operation In this configuration, the transmitting system which is put into a paused state by operating the pause key can be released from the paused state by the mute release means, regardless of the presence or absence of a dial tone from the line.

DESCRIPTION OF EMBODIMENTS An embodiment of the present invention will be described below with reference to the drawings. FIG. 1 shows a block diagram of a telephone according to an embodiment of the present invention.

1 is a dial key, 2 is a pause key, 3 is a pause release key, 4 is a redial key, 5 is a storage device as a dial information storage means, 6 is a microcomputer that controls the functions of a telephone, and includes an input section 6a and an output section. 6b, an arithmetic control section 6c, and a storage section 6d. Reference numeral 7 denotes a transmitter mute display, 8 a transmitter mute means, and 9 a handset, which includes a transmitter 9a and a receiver 9b. Reference numeral 10 denotes a transmitting system amplifier, which is controlled by the transmitting mute means 8.

Reference numeral 11 denotes a dial signal generating means, which in this embodiment sends out a DTMF signal to the transmitting system under control from the microcomputer 6. 12 is a hybrid circuit, 13 is a telephone line, and the output of the transmitting system amplifier 10 and the output of the dial signal generating means 11 are connected to the telephone line 1 through the hybrid circuit 12.
3 is output. Reference numeral 14 denotes a receiver system amplifier, and 15 denotes dial tone detection means.The reception signal passed through the hybrid circuit drives the receiver 9b through the receiver amplifier 14 and is input to the dial tone detection means 15.
When a dial tone is detected by 5, a signal to that effect is output to microcomputer 6.

The operation of the telephone configured as described above will be explained below. When the dial key 1 is operated during a normal call operation, a dial number corresponding to the dial key is input to the microcomputer 6, and the microcomputer 6 stores the dial information in the storage device 5 and generates a dial signal. Control means to send a DTMF signal to the line. For example, in the telephone of this embodiment connected to a private branch exchange (PBX), when dialing is performed quickly such as "0", "pause", "1", "2", etc., the dial information "0" is first stored in the storage device 5. The dial signal generating means 11
A DTMF signal corresponding to dial "0" is sent. After that, since the pause key was pressed, the microcomputer 6 stores the pause information in the storage device 5, drives the transmitter mute means 8, mutes the transmitter system amplifier 10, and transmits the signal from the transmitter 9a to the line. The output of the dial tone detection means 15 is monitored. The transmitting mute display 7 displays the following information to the user using a signal from the microcomputer 6 that drives the transmitting mute means 8.
Displays that the transmitted voice is currently being muted. During this time, the next dials "1", "2", etc. are inputted, so these dial information is stored in the storage device 5.

On the other hand, the private branch exchange (not shown) captures one outside line, so when the dial tone from the central office is returned, the dial tone detection means 15 detects this and sends a signal to the microcomputer 6.
When the microcomputer 6 receives the dial tone detection signal, it cancels the transmitting mute means 8 and also cancels the transmitting mute display, and then displays the dial information "1" after the pause information stored in the storage device.
While sequentially reading "2"..., the dial signal generating means 11 is controlled to send out a dial signal.

By the way, if the level of the dial tone returned from the telephone office is extremely low for some reason, the dial tone detection means 15 will not be able to detect this, and the microcomputer 6 will remain in the state where the transmitting system is muted. We will continue to wait.

At this time, when the user operates the pause release key 3, the microcomputer 6 cancels the mute of the transmitting system as if it had detected a dial tone, and automatically sends out subsequent dials.

A time chart of the above operation is shown in FIG.
a is the switch status, b is the dial key,
The state of the pause key operation, c is the state of the dial tone from the private branch exchange, d is the state of the dial tone returned from the outside telephone office, and e is the section in which the dial tone is detected, that is, the transmitting system is muted. section, f is sent to the line.
Indicates the state of the DTMF signal.

First, when the hook switch changes from the on-hook state to the off-hook state as shown in a, a dial tone is output from the private branch exchange as shown in c. Here, when the dial key "0" is operated as shown in b, a dial signal of "0" is sent to the line as shown in f. When the private branch exchange receives this "0" signal, the private branch exchange stops its own dial tone and captures the outside line, as shown in c. Then, as shown in d, a dial tone is transmitted from the outside telephone office. Meanwhile, as shown in b, if the pause key is operated, the transmission is muted as shown in e, dial tone detection operation is started, and the dial tone is dialed for a certain period of time as shown in the dial tone detection section in the figure. If the tone can be detected, e
Automatically cancel the transmitting mute as shown in
The dials "1" and "2" that had been pressed until then
"3"... is automatically sent as shown in f.

Figure 3 shows that the dial tone detection means cannot detect the dial tone and operates the pause release key.
This is a time chart when canceling the transmitting mute state. a′, b′, c′, d′, e′, f′ are the second
Shows the same items as the figure. The fact that the dial tone of the external telephone office is represented by a broken line in d' indicates that the signal cannot be detected by the dial tone detection means because the level is insufficient for some reason. When the pause release key is operated as shown in b', the transmitting mute is automatically released as shown in e', and the dial that has been memorized up to that point is automatically sent out.

As described above, if the called party is busy when all dialing signals have been sent, or if you wish to dial the same party repeatedly, when you operate the redial key 4, the dialing information will be retrieved from the storage device 5. Column “0” “Pose” “1” “2” “3”…
is read out and operates as if a key had been operated. If a dial tone is detected, the subsequent dials are automatically sent out. If the dial tone is not detected, the subsequent dials are sent by operating the pause release key. Dials can be sent automatically.

According to the present invention, it can be confirmed by the transmitter mute display that the transmitter is being muted while dial tone is being detected, and the transmitter mute state can be canceled by providing a pause release key. Therefore, when you accidentally operate the pause key during a call or when a dial tone cannot be detected, you can recover from the situation without going on-hook and dialing again from the beginning. The operational effects are significant.

Furthermore, in the above explanation, the telephone of the present invention is connected to a private branch exchange, and the pause information is used only once in the number string of one call. In this case, it may be necessary to check the dial tone more than once during dialing, and in such cases, the possibility of dial tone detection errors increases, so the effect of the present invention is even greater. Become.

In the above embodiment, a dedicated key was provided as a pause release key, but a telephone with a function to simply mute or cancel a transmitted call is equipped with a mute key for this purpose. If the Mute key is also used as a pause release key, the operations of the present invention can be performed with a more natural feeling of operation.

Effects of the Invention As described above, in the present invention, even if the transmission of the dial signal is interrupted or the transmitting system is muted until a dial tone is detected from the line by operating the pause key, the pause canceling means You can forcibly return from the suspended state and the miute state, so
If the level of the dial tone from the line is too low to be detected and dialing stops, or if you accidentally press the pause key during a call and the mode goes into mute mode, turn on-hook and try dialing again. It is possible to release the pause state without restarting the operation.

[Brief explanation of drawings]

Fig. 1 is a block diagram showing the configuration of an embodiment of the present invention, Fig. 2 is a time chart when the transmit mute is automatically canceled by the dial tone detection means, and Fig. 3 is a time chart when the transmitting mute is automatically released by the pause release key. This is a time chart when the conversation is canceled. 1...Dial key, 2...Pause key, 3...
...Pause release key, 4...Redial key, 5...
...Storage device, 6...Microcomputer, 7...
...Transmission mute display, 8... Transmission mute means, 9... Handset, 10... Transmission amplifier, 11
... dial signal generating means, 12 ... hybrid circuit, 13 ... telephone line, 14 ... receiving amplifier, 15 ... dial tone detection means.

Claims (1)

[Scope of Claims] 1. A plurality of key data of a dial key and key data of a pause key instructing to lengthen the interval between transmissions of dial data are sequentially stored in a storage means, and the data are outputted from the storage means. The telephone transmits a dialing signal according to the key data of a pause key, the telephone set comprising: detecting means for detecting a dial tone from a line according to key data of a pause key; and a telephone that dials until the dial tone from the line is detected by the detecting means. interrupting the signal transmission,
control means for muting a transmitting system; a pause for continuing transmission of a dial signal that has been interrupted by the control means; and canceling a mute state of the transmitting system muted by the control means; A telephone comprising: a release means;