JPH0215765A - Line connection method - Google Patents

Abstract

PURPOSE:To improve the utilizing efficiency of a line by notifying the vacant state of a trunk line to a registered extension line when the trunk line becomes vacant after being used and reregistering the extension line by enabling another line to catch the trunk line when the another line makes a connection request while waiting for the response of the registered extension line. CONSTITUTION:By connecting the extension line of an extension telephone set 1 which makes a registering operation through a registration table with a ringing tone(RGT) 6 through a switch network 2, vacancy of a trunk(TRK) 3 is notified to the registered telephone set 1. Then the registration table is reset and the response of the telephone set 1 is judged from inputted off-hook information. When no response is made from the telephone set 1, the input information of other extension telephone sets is checked. In order to notify the registered telephone set 1 that another extension telephone set catches the TRK 3, cancellation of the connection of the RGT 6 with the telephone set 1 is outputted to the switch network 2. Then the extension number of the telephone set 1 is again registered in the registration table in a memory(MM) 9.

Description

[Detailed Description of the Invention] [Industrial Application Field] The present invention relates to a line connection system, such as a private branch exchange (hereinafter referred to as PBX) and a key telephone system (hereinafter referred to as KTS).
This relates to a line connection method for devices having a line switching function such as.

[Conventional technology] Conventionally, as a service function of devices such as PBX%KTS,
There is a service function called station line camp-on (or trunk queuing). This service function is a function that registers the central office line trunk by performing a registration operation from the extension telephone when the central office line trunk is in use, and when it becomes free, calls the registered extension telephone and seizes the central office trunk. .

An example of the registration operation for this station line camp-on function will be described below.

Take the extension telephone off-hook and dial the central office line acquisition special code "0゛°" to make a call to the central office line.If all the central office line trunks to accommodate the telephone are in use, a busy tone (B T : When the BT is over, the caller dials the central office line camp-on special number to register the central office line trunk. When the registration operation is completed, the device indicates registration completion. A confirmation tone is output, and this confirmation tone causes the caller to hook up the extension telephone and complete the registration.Then, when the registered central office line trunk is in the idle state for 8 lines, the return trunk is set to the capture prohibited state. A ring tone (RGT: 11in3ingTone) is output to the extension telephone registered by the registration operation.

If there is an off-footer response to this ringing tone, the central office line trunk is connected and the dialing state is entered manually.

[Problems to be Solved by the Invention] In the above conventional example, after the return camp-on is registered, the central office line trunk becomes vacant, and when the registered extension telephone is called, it takes at least several minutes before the extension telephone responds. It takes a few seconds, and during that time, capture from other extensions is prohibited. This is to prevent the registered extension telephone from being unable to acquire the central office line trunk and invalidating the registration.

However, if the capture of a vacant central office line trunk is prohibited from being captured by other extensions, the vacant central office trunk cannot be used while the registered extension telephone does not respond to the call.

The present invention was made to solve the above problems, and
To provide a line connection method that allows a vacant office line trunk to capture another line and re-registers the office line camp-on while the office line camp-on is being called.

[Means for Solving the Problem] In order to achieve the above object, the line connection method of the present invention has the following features:
In the line connection method of equipment with a line switching function, if 13 central office lines are in use and become vacant, W t
It notifies the extension that has done this that the central office line is free, and allows the central office line to be captured by another line while waiting for a response from the extension. The outline of this is to notify the acquisition of the central office line and to re-register the extension.

[Embodiments] Hereinafter, preferred embodiments of the present invention will be described in detail with reference to the drawings.

[Description of the Apparatus (Fig. 1) Fig. 1 is a block diagram of the apparatus configuration in this embodiment. In the figure, 1 is an extension telephone, 2 is a switch network, 3 is a trunk (TRK), and 4 is a busy tone ( BT) sound, 5 is the ringback tone (RBT) sound source, 6 is the ringing tone (RGT) sound source, 7 is the confirmation tone (CT) sound source, 8 is the central control unit (CC), and 9 is the sound source of the ringback tone (RBT). This is a memory unit (MM).

The central control unit 8 in this embodiment includes a CPU that controls the entire device and a ROM that stores the processing procedures of the CPU. 1. Write down the registered extension number and trunk number. It consists of a table etc. Further, each extension telephone 1 is a button telephone that outputs hook information and dial information to the CC 8 separately from voice. Each of the sound sources 4 to 7 is connected to the switch network 2 under the control of the central control unit 8, and is outputted to the connected extension telephone 1 in order to notify the wearing state. For example, if you receive 3 incoming calls via a public network,
If there is, TRK3 detects the incoming call and outputs an incoming signal to CC8. This incoming signal causes CCa to
6 and the extension telephone 1 corresponding to the incoming call TRK 3 are connected through a switch network 2. And extension telephone 1 is RGT
It rings with the ringing tone from 6.

[Description of Processing Procedure (FIG. 2)] Next, the processing procedure after completion of extension-to-office-line camp-on registration in this embodiment will be described below with reference to the flowchart of FIG. 2.

First, in step S10, the free space of TRK3 is checked, and if it is free, the process proceeds to step S12,
It is determined from the above-mentioned registration table of MM9 whether there is an extension for which central line camp-on has been registered. Then, if there is no registration, the process ends, and if there is registration, in step S14, the extension of the extension telephone l on which the registration 23 operation was performed is entered from the registration 6m table, and the RGT6
is connected via the switch network 2, and the registered extension telephone if is notified of the availability of TRK3. Next, in step S16, the registration table is reset, and in step 318
The judgment is made based on the off-hook information inputted with the response of the extension telephone 1 registered in . Here, if there is no response, the manual information of other extension telephones is checked in step S20, and if it is a central line capture special number that captures TRK3, step S20 is performed.
The process proceeds to step 22. However, if it is not the local line acquisition special number, the process returns to step 318 and waits for a response. Step S
In step 22, an RGT6 connection release is output to the switch network 2 in order to notify the registered extension telephone 1 that another extension telephone has captured TRK3. Next, in step S24, the registered extension telephone 1
In order to camp on the central office line again, the extension number is registered in the registration table in the MMQ described above, and the process is terminated.

On the other hand, if there is a response from the extension telephone 1 that was registered in step S18, in step S26, an RGT 6 connection release message is output to the switch network 2 in order to stop the RGT 6. Then, in step 328, the connection between the idle TRK 3 and the extension is output to the switch network 2, and the process ends.

In this embodiment, the fact that a trunk has been captured during a call to an extension telephone that has registered a central office line camp-on is notified by stopping the ring tone (RGT), but a special tone may be sent for a short period of time. Alternatively, a display device may be installed on the extension telephone so that when the ringer is ringing, a visual message such as "Camp-on calling °" and, if the trunk is captured, "Camp-on waiting °" etc. A change in status may be notified.

According to this embodiment, if a trunk is captured during a call to a central office line camp-on, the call is stopped and the central office line camp-on is automatically re-registered, thereby preventing the central office line trunk from being captured from an extension. This has the effect of improving operability.

[Effects of the Invention] As explained above, when a station line that is in use changes to an idle status, the idle status of the station line is notified to the registered extension, and while waiting for a response from the extension, The line usage efficiency is improved by allowing the acquisition of the central office line from another line, and when the acquisition occurs from another line, the extension is notified of the acquisition of the other line's central office line, and the extension is re-registered. .

[Brief explanation of the drawing]

FIG. 1 is a block diagram of the device configuration in this embodiment, and FIG. 2 is a flowchart showing the operating procedure in this embodiment. In the figure, 1... extension telephone, 2... switch network, 3...
...Trunk, 4...Busy tone sound source, 5...
Sound source of ringback tone, 6... Sound source of ringing tone, 7... Sound source of confirmation sound, 8... Central control unit,
9...Memory section.

Claims (1)

[Claims] In the line connection method of equipment with a line switching function, when a station line that is in use changes to an idle status, the idle status of the station line is notified to the registered extension, and while waiting for a response from the extension, The line connection system is characterized in that the extension is permitted to capture a central office line from another line, and if the extension is seized from another line, the extension is notified of the acquisition of the other line, and the extension is re-registered.