JPH01126858A - Automatic redialing system - Google Patents

Abstract

PURPOSE:To decrease the wait time of an opposite party by allowing a master set to store a dial number at dialing till a new trunk line is acquired. CONSTITUTION:A telephone system consists of a master set 1 connecting to a trunk line 3 and plural telephone sets 2 connected by extensions 4. The master set 1 stores a request of automatic redialing and an identification number of its relevant telephone set, detects an incoming call till trunk line acquisition after release of trunk line at repetitive redialing, interrupts succeeding redialing in case of detecting the incoming call, applies incoming processing and restarts redialing based on the storage content. Thus, the talking with an opposite party during the automatic redialing is possible by detecting an incoming call between the trunk line release and the trunk line acquisition in the automatic redialing state. Thus, the wait time of an opposite party is reduced.

Description

DETAILED DESCRIPTION OF THE INVENTION (Field of Industrial Application) The present invention relates to an automatic redial system in a telephone system comprising a main device connected to a return line and a plurality of telephones connected to the main device by extension lines.

(Prior Art) Conventionally, this type of telephone system has an auto-redial (automatic re-dialing of a central office line) function. This automatically returns the message and sends the message again. When setting this auto redial, press two types of keys, namely the pushbutton (hereinafter simply referred to as buttons) in succession while making an outside call to go on-hook (release the line) and enter the auto-repeat state. It is something to do. This automatic redial function is canceled by an off-footer (line capture), the repeat stops, and the dial number stored at the time of the call is also deleted.

(Problems to be Solved by the Invention) However, the auto-redial system described above has the following problems.

Since the dialed number for a central office line call is erased from the memory by the off-footer, once the auto-redial state is canceled, if you want to perform auto-redial again, you will have to dial the other party again. Further, while in the auto-redial state, even an extension call cannot be received, so the other party cannot make a call until the auto-redial is completed.

SUMMARY OF THE INVENTION An object of the present invention is to solve the above-mentioned problems and provide an auto-redial system that can simplify auto-redial setting operations and reduce functional restrictions.

(Means for Solving the Problems) In order to solve the above-mentioned problems, the present invention provides an automatic redial system for a telephone system consisting of a main device connected to a return line and a plurality of telephones connected to this by extension lines. , when the main device makes a call from the telephone to the central office line, the main device stores the dial number of the outgoing call until a new central office line is acquired;
When an auto-redial request is received from the telephone after going on-hook, the call is repeatedly made again based on the stored contents.

In a preferred embodiment, the main device stores the auto-redial request and the identification number of the telephone, detects an incoming call between the release of the central office line and the acquisition of the central office line during the repeated re-dialing, and detects the incoming call. When detected, subsequent re-calls are interrupted, and after processing the incoming call, re-calls are resumed based on the stored contents.

(Operation) The present invention operates as follows. The main device remembers the dialed number when making a call until it acquires a new station line, so
After auto-redial is canceled, an auto-redial request from the phone (for example, by pressing a specific button) causes
You can set auto redial without having to dial again. Furthermore, after registering a dial number and canceling auto-redial, it is possible to receive calls from a central office line (external line) and make and receive calls from an extension line without deleting the dial number. Furthermore, in the auto redial state,
By detecting an incoming call between the release of the central office line and the acquisition of the central office line, when an incoming call is detected, it is possible to talk to the other party, and the waiting time on the other party can be reduced. Therefore, the problems of the prior art described above can be solved.

(Example) The present invention will be described in detail below with reference to FIGS. 1 to 4.

FIG. 1 is a block diagram of the main parts of a telephone system to which the method of the present invention is applied. The system of this embodiment is configured by connecting a main device 1 to a central office line 3 and a plurality of telephones 2 via an extension 4. The main device 1 accommodates the office line 3, and the office line (line)
A central office line accommodation circuit 11 that captures, releases, etc., a transmitting/receiving section (
It is equipped with a CPU 12 which has a function as an extension side exchange and an automatic redial function under the control of a computer (not shown), and a memory 13 which stores various information such as a dial number and an identification number of the telephone 2. The memory 13 stores the dialed number issued to the central office line 3 until a new central office line is acquired. The telephone 2 includes an operating section 21 provided with buttons such as numeric keys and special keys, a display section 22 such as a liquid crystal display that displays dial numbers, etc., and a transmitting/receiving section (Fig. extension 49 under the control of
A PU 23 is provided which has a function of making a call to the central office line 3 and a function of requesting automatic redial from the main device 2. Special keys on the operation unit 21 include a repeat key for requesting auto redial (auto repeat), a key for requesting connection to the office line 3 (hereinafter referred to as the office line key), a key for requesting connection to the extension 4, etc. Be prepared.

FIG. 2 is a flowchart showing the operation of this embodiment,
FIGS. 3 and 4 show a dial number registration sequence and an auto redial sequence, respectively.

Next, the operation of this embodiment will be explained with reference to FIGS. 2 to 4.

First, when the telephone 2 is off-hook and the local line key on the operation unit 21 is pressed, the CPU 23 requests the CPU 12 of the main device 1 to connect to the local line 3 via the extension 4 (S
l, Figure 3 (a)). As a result, the CPU 2 causes the office line accommodation circuit 11 to capture the office line 3, and the CPU 2
3, a message to that effect is displayed on the display unit 22, or the office line lamp (not shown) of the office line key is lit, and a dial tone (DT) is sent to the handset or speaker (not shown) of the telephone 2. Send (S2. Figure 3 (b)). When the telephone 2 side receives the dial tone, it manually inputs the dial number by pressing the numeric keys etc. on the operation unit 21 (S
3. Figure 3 (8)). As a result, a signal indicating the dial number is sent from the CPLI 23 to the CPU 12 (:P
It is stored in a predetermined area of the memory 13 by U12 (S
4. Figure 3 (A), (D)). After that, CPUI2
sends a selection signal indicating the dialed number to the central office line 3 via the central office line accommodation line 11 to place a call (outgoing call) to the telephone of the other party (external line).

In this way, the dialed number is stored (registered) in the memory 13 until a new line (office line) is acquired. It is possible to receive calls from the central office line and to make and receive calls from extension lines (see Figure 3).

When a busy tone (IIT) is received from the office line as a result of the above call, the CPU 12 transfers the busy tone to the handset or speaker of the telephone 2 via the CPU 23 (S5). As a result, when on-hook is performed on the telephone set 2 side, the CPU 23 notifies the CPU 12 of this fact, and the CPU 12 controls the central office line accommodation line 1 to release the central office line and make it vacant (S6, S7).

Next, when the repeat key on the operation unit 21 is pressed, this is notified to the (:PU 12 via the CPU 23 (S
8. Figure 4 (a)). As a result, when the CPU 12 learns that the repeat key has been pressed, the CPU 12 sends the dial number stored in the memory 13 to the display unit 22 via the CPU 23.
At the same time, the central office line storage circuit 11 is controlled to display the central office line 3.
By capturing the dialed number and sending a selection signal indicating the dialed number to the central office line 3, a call is made again to the other party's telephone (S9, FIGS. 4(b) and 4(c)). When a busy tone is received in response to this call, the CPU 12 starts counting the built-in timer and transfers the busy tone to the telephone 2 ((8), (=) in FIG. 4). C.P.
At t112, the timer is monitored and, for example, when the timer counts 20 seconds (S), the central office line accommodating circuit 11 is controlled to close the central office line 3.
(S 10 , FIG. 4 (E)). Furthermore,
When the timer counts, for example, 55 to 755, the CPU 12
Then, in the same manner as above, the dial number display section 22
The procedure of displaying the display, capturing and calling the central office line 3, and releasing the central office line 3 is repeated a predetermined number of times or until an incoming call is detected (Sll, S12..., Fig. 4). (
to) ~ (nu)). For example, if an incoming call is detected from the other party's telephone via the central office line 3 as a result of re-dialing, this fact will be sent to the CPU.
Transferred from 12 to telephone 2 (Figure 4 (ru) to (power)
).

In the above explanation, in the auto redial state (after pressing the repeat key), from central office line release (S10) to central office line acquisition (51,
In the section up to 1), the central office line was simply released and no incoming calls were detected, but the memory 13 stores the fact that an auto-redial request was made and the identification number of the telephone 2 that made the request. In addition, when the PU 12 detects an incoming call in this section, it interrupts auto redial, performs incoming call processing, and after the incoming call processing is completed, the call is interrupted based on the contents stored in the memory 13. By restarting auto redial, it becomes possible to receive calls from the central office line or extension line during auto redial. Of course, it is also possible to make a call to an extension in the same way, but this is done by canceling auto redial.

To cancel auto redial, in this embodiment, the repeat key is pressed again during auto redial. As a result, a cancellation request is notified from the CPU 23 to the CPU I 2, and auto redial is canceled. However, in this case, the dial number of the other party is still stored in the memory 13.

Therefore, by pressing the repeat key, auto redial can be easily set without dialing again until a new line (office line) is acquired.

As described above, according to this embodiment, the following effects can be obtained.

(1) After auto-redial is canceled, unless a new line is acquired, auto-redial can be set by simply pressing the repeat key without dialing again.

(2) After registering a dial number and after canceling auto redial, it is possible to receive an outside line, make and receive an extension call, etc. without deleting the dial number.

(3) By detecting an incoming call during the interval from the release of the central office line to the acquisition of the central office line in the automatic redial state, it is possible to talk to the other party during automatic redialing, reducing the waiting time for the other party. .

(Effects of the Invention) As described above in detail, according to the present invention, the dial number is stored until a new line is acquired, so auto redial can be easily performed without dialing again after canceling auto redial. It can be set as well as
You can receive and receive external calls and make and receive internal calls without deleting the dial number. Furthermore, by detecting an incoming call during the period from the release of the central office line to the acquisition of the central office line in the auto-redial state, it becomes possible to talk to the other party during the automatic redialing, thereby reducing the waiting time of the other party.

[Brief explanation of the drawing]

FIG. 1 is a block diagram of a telephone system to which the method of the present invention is applied, and FIG. 2 is a flowchart showing the operation of this embodiment.
FIG. 3 is a sequence diagram of dial number registration, and FIG. 4 is a sequence diagram of auto redial. DESCRIPTION OF SYMBOLS 1... Main device, 2... Telephone, 3... Office line, 4... Extension, 11... Office line accommodation circuit, 12.23.-[:PI. 13...Memory, 21...Operation unit.

Claims (2)

[Claims] (1) In an auto-redial system for a telephone system consisting of a main device connected to a central office line and a plurality of telephones connected to this by extension lines, the main device is configured to dial the number of calls made when a call is made from the telephone to the central office line. An auto-redial system characterized in that a number is memorized until a new central office line is acquired, and when an auto-redial request is made from the telephone after going on-hook, re-dialing is repeatedly performed based on the stored contents. (2) The main device stores the auto-redial request and the identification number of the telephone, and detects an incoming call between the release of the central office line and the acquisition of the central office line during the repeated re-dialing. Then, subsequent re-transmissions will be interrupted, and
The automatic redial system according to claim 1, wherein after performing the incoming call processing, re-calling is repeatedly restarted based on the stored contents.