JPH05122354A - Key telephone system - Google Patents

Abstract

PURPOSE:To provide the key telephone system capable of saving the labor and time of re-calling, eliminating the need for awaiting the end of the call of an opposite telephone set and effectively utilizing plural outside lines by automatically redialing other telephone number registered in advance when the busy state of the opposite telephone set is detected at the dialing of the outside line. CONSTITUTION:This telephone system is provided with a destination memory section 38 registering plural telephone numbers to each one destination and with a busy tone detection section 32 detecting a busy tone of the destination telephone set at the dialing of the outside line and when the destination telephone set is busy, other telephone number registered in the destination memory section 38 is automatically redialed.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a key telephone device, and more particularly to a key telephone device having an automatic redialing control function when the other telephone is busy when an outside line is called.

[0002]

2. Description of the Related Art Conventionally, in this type of key telephone apparatus, when the other party's telephone is busy at the time of making an outside line, automatic redial is made to the same telephone number after a lapse of a certain time.

[0003]

In the above-mentioned conventional key telephone apparatus, when the other party telephone is busy at the time of making an outside line, the automatic redialing is made to the same telephone number after a certain period of time. Therefore, even when the destination has two or more telephone numbers, it is necessary to redial the same telephone number after a certain period of time or manually call another telephone number.

The present invention has been made in view of the above problems, and when the destination has two or more telephone numbers, the other telephone number is dialed when the other telephone is busy when the outside line is called. It is an object of the present invention to provide a button telephone device that saves the trouble of repairing, eliminates the need to wait for the end of the call from the other telephone, and effectively uses an outside line.

[0005]

A button telephone apparatus according to the present invention is a button telephone apparatus having at least one button telephone and a main control unit for accommodating at least one outside line and controlling the entire apparatus. 1. A destination memory unit capable of registering a plurality of telephone numbers for each destination, a busy detecting unit for detecting busy of the other telephone when an outside line is called, and a busy detecting unit for detecting busy of the other telephone. , And a transmitting means for transmitting another telephone number registered in the destination memory unit.

[0006]

In the key telephone device according to the present invention, when the busy detection unit detects that the other telephone is busy when the outside line is called, the calling means automatically calls another telephone number registered in advance in the destination memory unit. By redialing automatically, you can save the trouble of dialing another phone number, and you can eliminate the need to wait for the end of the other party's phone, so you can effectively use the outside line in offices with multiple outside lines. It is possible.

[0007]

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

FIG. 1 is a block diagram showing a key telephone device according to an embodiment of the present invention. The key telephone device of this embodiment includes a plurality (eg, n) of key telephones 11 to 1.
n, a button telephone interface 31 accommodating the button telephones 11 to 1n, a plurality (m in the illustrated example) of outside lines 21 to 2m, an outside line interface 33 accommodating the outside lines 21 to 2m, and a busy line from the station. A busy sound detector 32 that detects a sound and a main controller 34 that controls the entire key telephone device.
A program section 35 for storing the program of the main control section 34, an automatic re-transmission program section 36 included in the program section 35, a memory section 37 for storing the data of the main control section 34, and a memory section 37 , A destination memory unit 38 for storing a telephone number for each destination.

Table 1 below is a memory map of the destination memory unit 38 of the key telephone device of this embodiment. In this embodiment, a maximum of M destinations can be registered, and a maximum of N telephone numbers can be registered for each destination. The telephone number in the destination memory unit 38 is
It is registered in advance using the key telephones 11 to 1n or an external device (personal computer or the like). The registration means can be performed in the same manner as a speed dial or the like.

FIG. 2 is a flow chart showing the operation of the key telephone device of this embodiment. The operation of the present invention will be described with reference to FIG. First, the key telephone 11
Perform an outside line transmission operation at ~ 1n. Information from the above operation is
Main control unit 34 via button telephone interface 31
Sent to. Based on this information, the main control unit 34 controls the outside line interface 33 to make an outside line transmission, and transfers control to the automatic re-transmitting program unit 36. The automatic redialing program section 36 first checks the number (step S).
1). The check of this number is to search whether the external line number is registered in the destination memory unit 38. If the outside line number is not registered in the destination memory unit 38, the automatic redialing program unit 36 ends the process and returns to the normal process (step S2). If registered, the detection of the busy tone of the other party is started. (Step S2, Step S3).

The outside line interface 3 is used to detect that the other party is talking.
3 and the busy tone detector 32 are connected to detect the busy tone from the station. The busy sound detection unit 32 detects the busy sound for a certain period of time (steps S4 and S5), and when the busy sound cannot be detected, it is determined that the outside line transmission is successful, and the busy sound detection unit 32 is connected to the outside line interface 33. Then, the detection of the busy tone is ended (step S6), and the automatic re-transmission program section 36 ends the process and returns to the normal process.

[0012]

[Table 1] When the busy sound detection unit 32 detects the busy sound in step S4, the main control unit 34 searches the destination memory unit 38 again,
It is checked whether another external line number is registered for the same destination (step S7). If another outside line number is not registered, the busy tone detection unit 32 is disconnected from the outside line interface 33 to end the detection of the busy tone (step S6), and the automatic re-transmission program unit 36 ends the process. And returns to normal processing.

If another outside line number is registered, the main control unit 34 controls the outside line interface 33 to restore the outside line to make it free (step S8). Further, the external line interface 33 is controlled again to perform outgoing capture (step S9) to capture an available external line, and the destination memory unit 38
Make a call according to the telephone number registered in (Step S
10). After the call is made, the detection of the talking partner is started again (step S3).

In the process of step S7, in the second and subsequent processes of step S7 at the same destination, the telephone number once transmitted is temporarily stored in the destination memory unit 38 for a fixed time until the automatic transmission process ends. It is also possible to delete.

As described above, when the outside telephone call control function of the key telephone device of the present invention detects that the other party telephone is busy during the outside telephone call, another telephone number of the other party who is registered in advance in the destination memory unit 38 is displayed. You can redial automatically.

When the outside line is ISDN, it is possible to judge that the other party is busy by exchanging messages with the station. For this reason, the busy detection unit in the claims does not detect the busy tone by detecting the busy tone like the busy tone detection unit 32 of the present embodiment does. It is also possible to detect that the other party is busy by exchanging.

[0017]

As described above, according to the key telephone device according to the present invention, when an outside line is to be dialed and the other party has two or more telephone lines, the plurality of telephone numbers are registered in advance. , When a call is made to an outside line and the other telephone is busy, another telephone can be automatically redialed. Therefore, it is possible to save the trouble of making a call again, and it is not necessary to wait for the other party to end the call, so that the outside line can be effectively utilized.

[Brief description of drawings]

FIG. 1 is a block diagram showing a key telephone device according to an embodiment of the present invention.

FIG. 2 is a flowchart showing the operation of the key telephone device of the present embodiment.

[Explanation of symbols]

 10 to 1n; button telephone 20 to 2m; outside line 31; button telephone interface 32; busy tone detection unit 33; outside line interface 34; main control unit 35; program unit 36; automatic re-transmission program unit 37; memory unit 38; destination Memory part

Claims (1)

[Claims] 1. A button telephone device having at least one button telephone and a main control unit for accommodating at least one outside line and controlling the entire device, wherein a plurality of telephone numbers can be registered for each destination. A memory unit, a busy detection unit that detects that the other telephone is busy when an outside line is called, and another telephone registered in the destination memory unit when this busy detection unit detects that the other telephone is busy. A button telephone device having a calling means for sending a number.