JP2709180B2 - Key telephone equipment - Google Patents

Description

Description: BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a key telephone apparatus, and more particularly to a key telephone apparatus for exchanging connections between a plurality of external lines and a plurality of key telephones.

2. Description of the Related Art Conventionally, this type of device has been capable of responding to an incoming call from a central office simply by going off-hook. Also, after completing a call during a call with an office line, if you press another office line button without going on-hook, you will be able to respond to an incoming call or hold on the applicable office line or make a new call. There was also.

[Problems to be Solved by the Invention] However, in the above-described conventional example, if the user goes off-hook and presses the target office line button for the purpose of responding to a hold without noticing the incoming call from the office line, the incoming call is made at the time of off-hook. In response, there is a problem that the line on which the call has been received is released when the line button is pressed.

An object of the present invention is to solve the above problems and to provide a key telephone apparatus which does not release a line even if there is an erroneous operation as described above.

[Means for Solving the Problems] In order to solve the above problems, according to the present invention, in a key telephone apparatus for exchanging connections between a plurality of external lines and a plurality of key telephones, the key telephone is first off-hook. A timer means for measuring an elapsed time from the time when the telephone responds to the incoming call from the outside line; and when the external line button corresponding to the second outside line is operated after responding to the incoming call from the first outside line, the external line button It is determined whether or not the elapsed time from the incoming call response measured by the timing means exceeds a predetermined time when is operated, and if the predetermined time is not exceeded, the first outside line is not opened, When the predetermined time is exceeded, the first outside line is released, and a configuration is provided in which control means for capturing the second outside line is provided.

[Operation] According to the above configuration, when an outside line button corresponding to the second outside line is operated after responding to an incoming call from the first outside line,
When the outside line button is operated, it is determined whether or not the elapsed time from the incoming call response measured by the timing means has exceeded a predetermined time, and if not, the first outside line is released. If the predetermined time is exceeded, the first outside line is released and the second outside line is captured.

EXAMPLES Hereinafter, the present invention will be described in detail based on examples shown in the drawings.

First Embodiment FIG. 1 shows a first embodiment of the present invention.

In FIG. 1, reference numeral 1 denotes a main device for controlling the entire device.
To 5 blocks.

First, the control unit 2 includes a microprocessor, a built-in timer, and the like, and controls the entire system including the main device and the telephone 7. Speech network 3 interfaces voice signals between central office interface 4 and telephone interface 5. The office line interface 4 and the telephone interface 5 are composed of a known line and a subscriber trunk circuit, and perform detection of an incoming call from the office lines 61, 62,.

The office lines 61, 62,... Are accommodated in the multiple office line interface 4.

Reference numeral 7 denotes a key telephone having office line buttons 81, 82,. The office line buttons 81, 82 are provided in one-to-one correspondence with the office lines 61, 62, and are used to respond to an incoming call or hold. Reference numeral 9 denotes a handset of the key telephone 7.

FIG. 2 shows a control procedure of the control unit 2 in the above configuration when responding to an incoming call from the office line. The control means of FIG. 2 is stored in the ROM 2a as a control program of the control unit 2. Here, a case will be described as an example where there is an incoming call from the office line 61 and another office line is selected with the office line button.

In FIG. 2, when an incoming call from the office line 61 is detected via the office line interface 4 (step S1), the telephone interface 5 is controlled and a predetermined key telephone 7 sounds a ring tone (step S2).

When the handset 9 of the key telephone 7 is raised, an off-hook is detected via the telephone interface 5 (step S3), the ring tone is stopped by controlling the telephone interface 5, and the loop is closed by controlling the central line interface. Then, the speech network is controlled to connect the telephone 7 and the communication line of the office line 61 (step S4). This enables a call.

Here, start the 10-second timer in the control unit 2,
The time-up flag is cleared (step S6) to detect time-up or press of another station line button.

When the time-up is detected (step S6), the time-up flag is turned on (step S7).

If the press of the line button 82 of the telephone 7 is detected via the telephone interface 5 (step S8), the time-up flag is determined and if the time is up (step S9), the line is transmitted via the line interface 4. The line 61 is released, and the line 62 corresponding to the line button 82 is captured (step S10). If the time is not up (step S8), the process returns to step S6 without doing anything.

According to the above embodiment, a timer is started to measure a predetermined time from a point in time when an incoming call is answered from one office line (for example, 61) by the off-hook of the key telephone, and after the counted time, another key telephone is used. Local line (for example, 62)
When the local line button (82) is pressed, the first local line (61) is released and the second local line (62) is captured, while the second local line (62) is released within the time period. When the line center button of the line is pressed, this is ignored.

For this reason, the line switching function is not operated for a predetermined time measured by the timer from the time when the call is answered, and the line during communication is not released due to erroneous operation, and an excellent button that can tolerate erroneous operation by the user. Telephone equipment can be provided.

In the above, an example has been described in which there is an incoming call from the office line 61 and another office line is selected with the office line button. However, when the relationship between the office line 61 and the office line 62 is reversed, or when there are more office lines, It goes without saying that the same control is performed between arbitrary office lines even when connected.

In the above description, the timer value is set to 10 seconds. However, this value can be freely set. , A desired value may be set. In this case, by setting the minimum value and the maximum value, it goes without saying that the processing when the local line button 82 is pressed can be substantially fixed to either one.

Second Embodiment In the above embodiment, pressing of the line button is simply ignored within a predetermined time after off-hook.
As shown in the figure, when the central office button is pressed, an outside line during a call may be automatically put on hold, and then the line may be switched according to a user input.

FIG. 3 shows a configuration in which a sound source 10 for generating a hold tone is added to the configuration of FIG. 1, and the other configuration is the same as that of FIG.

FIG. 4 corresponds to the control procedure of FIG. 2. However, if step S9 is denied (that is, the timer has not overflown), the process does not return to step S8, but executes steps S11 and S12. It is.

In step S11, the current call state (for example, office line 61) is automatically put on hold. At this time, the sound source 10 is connected to the office line during the call via the speech network 3 and the office line interface 4, and the hold tone is transmitted and the loop is held.

In step S12, a corresponding office line (for example, 62) is captured in response to the pressing of the office line button (for example, 82) in step S8, and a call is made.

According to such a configuration, the line can be switched according to the user's intention without disconnecting the line during a call due to an erroneous operation as in the related art.

Note that, in order to prevent the user from forgetting while holding a busy line while holding a call, if there is a line that has been on hold for a predetermined time or more, a process of warning this may be performed.

Third Embodiment The sound source 10 of the second embodiment may be changed to a voice message generation circuit 11 as shown in FIG. In this case, as shown in FIG. 6, another telephone may be called to respond to another user.

In this case, step S11 in FIG. 4 is changed as shown in FIG. That is, in step S11 of FIG. 6, the voice message generating circuit 11 is connected to the outside line during the call, and for example, a voice message such as "calling another extension" is transmitted to the other station and another telephone 7 Ring the bell.

By such processing, without giving anxiety to the partner operator, and ensuring that another user responds, or giving a warning to the user who presses the line button by ringing the bell of another telephone. And you will not forget to keep the line you are talking on.

The voice message generation circuit 11 is composed of a voice synthesis circuit and the like.

Fourth Embodiment When another telephone is called when the line button is pressed, instead of transmitting a voice message,
As in FIG. 3, a sound source 10 may be provided, and a ringback tone may be transmitted according to the procedure of FIG.

In step S11 in FIG. 7, the sound source 10 is connected to an outside line during a call, the ringback tone generated by the sound source 10 is transmitted to the partner station, and the bell of another telephone 7 is sounded.

According to such a configuration, there is an advantage that it is possible to respond to the partner station with a simple sound source without using a voice synthesis circuit or the like.

[Effects of the Invention] As is clear from the above, according to the present invention, when an outside line button corresponding to a second outside line is operated after answering an incoming call from a first outside line, the outside line button is operated. At this time, it is determined whether or not the elapsed time from the incoming call response measured by the timing means has exceeded a predetermined time. If the predetermined time has not been exceeded, the first outside line is not opened, and the predetermined time is set. In the case of exceeding, since the first outside line is released and the second outside line is captured, even if the time has passed since the incoming call, the predetermined time after responding to the incoming call off-hook,
Even if the outside line button is operated, the incoming line will not be released,
It is possible to reliably prevent an incoming line from being released due to an erroneous operation of an outside line button at the time of an incoming call, and to provide an excellent button telephone device that can tolerate a user's erroneous operation.

[Brief description of the drawings]

FIG. 1 is a block diagram showing a first embodiment of a key telephone apparatus according to the present invention, FIG. 2 is a flowchart showing incoming call control of a control unit in FIG. 1, and FIG. 3 is a key telephone apparatus according to the present invention. FIG. 4 is a flowchart showing the incoming call control of the control unit in FIG. 3, and FIG. 5 is a block diagram showing a third embodiment of the key telephone apparatus according to the present invention. FIG. 6 is a flowchart showing the incoming call control of the control unit in FIG. 5, and FIG. 7 is a flowchart showing the incoming call control of the control unit in the fourth embodiment. DESCRIPTION OF SYMBOLS 1 ... Main apparatus, 2 ... Control part 3 ... Speech network 4 ... Office line interface 5 ... Telephone interface 6 ... Office line, 7 ... Telephone 8 ... Office line button, 9 ... Handset

Claims (3)

(57) [Claims] 1. A key telephone apparatus for exchanging connections between a plurality of external lines and a plurality of key telephones, wherein a timer means for measuring an elapsed time from a point in time when the key telephone responds to an incoming call from the first external line by off-hook. When an outside line button corresponding to a second outside line is operated after responding to an incoming call from the first outside line, the elapsed time from the incoming call response measured by the timing unit when the outside line button is operated. It is determined whether or not exceeds a predetermined time. If the predetermined time is not exceeded, the first outside line is not opened,
A key telephone apparatus, further comprising control means for releasing the first outside line when the predetermined time is exceeded, and for capturing the second outside line. 2. The control means according to claim 1, wherein said control means detects a press of an external line button corresponding to a second external line after receiving a response to the incoming call from said first external line. 2. The method according to claim 1, wherein when the time measured by the timing means is less than a predetermined time, the second outside line is captured while maintaining the connection with the first outside line. Button telephone equipment. 3. The key telephone apparatus according to claim 2, wherein said control means transmits a predetermined voice signal to said first external line when maintaining the connection with said first external line.