JPS63108895A - Dial-in service system - Google Patents

Abstract

PURPOSE:To prevent a dial in connection by an arbitrary dial operation of the caller of a line wire by setting a password number to the line wire to which a dial in service is applied. CONSTITUTION:When an incoming is present from a dial in line wire CO1, a central processing unit CCU transmits a tone or a message indicating a response to the line wire CO1 through a line wire trunk COT1. The caller connected to the line wire CO1 dials the password number set for the dial in connection according to this tone or the message. The unit CCU examines whether said password number coincides with a password number stored in a memory M or not and when they coincide, it dials an extension number to connect to a telephone set TEL in question. When they do not coincide, a disconnecting processing is executed.

Description

[Detailed Description of the Invention] [Industrial Field of Application] The present invention relates to a dial-in service system for telephone exchange equipment. This invention relates to a dial-in service system that can prevent arbitrary dial-in connection in a system in which connection to an extension line is performed by a dial operation by a caller of an outside line.

[Prior art]

As one method of providing a dial-in service to a telephone exchange, a method is known in which an incoming external line is automatically answered and then the incoming external line is directly connected to an extension by a dial operation performed by the person calling the external line.

In the conventional dial-in service system described above, the telephone exchange automatically answers an incoming outside line call and then sends out a signal tone to notify that the outside line has been answered. In response to this, the telephone exchange equipment will IK the incoming external call to the corresponding extension.
I'm trying to get a close connection.

[Problem that the invention seeks to solve]

In the conventional dial-in service method described above, it is possible to connect to any extension of the telephone exchange by dialing the extension number of the caller, for example, if the extension is used by a company executive. In some cases, such as when a computer terminal is connected to an extension, being able to dial-in to any extension is extremely inconvenient as it allows arbitrary connections to these extensions.

The present invention is proposed to solve the above-mentioned problem, and aims to provide a dial-in service method that can prevent dial-in connections caused by arbitrary dialing operations by outside callers. do.

[Means for solving problems]

For the above purpose, the present invention sets a PIN number for the outside +lK that provides dial-in service, so that the caller of the outside line must dial the PIN number before dialing the extension number. [Configuration of Embodiment] FIG. 1 is a block diagram showing an embodiment of the present invention.

As shown in FIG. 1, the parts related to the present invention in the telephone exchange device are mainly composed of a one-chip CPU.
A central processing unit CCU that performs various controls collectively, and an interface with external line trunks COT, COT, and extension telephones (hereinafter referred to as telephones), which function as interfaces with external lines CO, CO, CO, and CO. A line circuit LC1 having a line circuit LC1, a register R that receives a dial signal sent from the outside line CO, , CO, by a dial operation of an outside caller, a memory M1 that stores various data for dial-in connection, and a call path. This is a switch circuit 8NW that closes the .

[Effect of the embodiment]

FIG. 2 is a flowchart showing control in an embodiment of the present invention.

In FIG. 1, the outside line C01 is an outside line that provides dial-in service (hereinafter referred to as a dial-in outside line), and the outside line CO8 is an outside line that does not provide dial-in service (hereinafter referred to as an outside line). Proceed with the following explanation of the operation. In the following explanation, the symbols in parentheses indicate the correspondence between the explanation of that part and FIG. 2.

When an incoming call is received on the external line COI or Co (a), a calling signal is sent to the external line CO1 or CO8.

This call signal is an external trunk COT or COT.

CCU receives the paging signal via the control line t1 and centrally processes it.
OT, and based on this, it is determined whether the incoming external line (hereinafter referred to as the incoming external line) CO or CO2 is a dial-in external line or a general external line. Telephone exchange equipment is usually equipped with a memory (not shown) that stores various system data for the trunk trunk (not limited to the outside line trunk), and the determination in (b) above is based on the outside line trunk COT of this memory. , or COT.

Please refer to the section below.

Now, if the incoming outside line is outside @Co, then the outside line C
Since the call line is a general outside line, the central processing unit CCU processes incoming calls for the general outside line. That is, for example, if a telephone exchange is equipped with a reception board (relay board), an incoming call from an outside line CO2 will be displayed on the reception desk, and if the telephone exchange is a button telephone device, the reception desk will display the incoming call from the outside line CO8.
The incoming call of the external line CO1 is displayed on the key telephone in which the telephone is housed. The above-described incoming call processing for general outside lines is processing that has been conventionally performed in telephone exchange equipment.

Furthermore, when the incoming external line is an external line fIsCO, the external line CO1 is a dial-in external line, so the central processing (22) CCU connects the external line trunk COT, via the control line t1.
d) to automatically answer the incoming call on the outside line CO8, and send out a signal tone or message indicating that the outside line CO1 has been answered via the outside line trunk C0T1. .

The calling party connected to the outside line CO1 hears the above-mentioned signal tone or message and then dials the password set for the dial-in connection. This password is transmitted as it is to the telephone exchange via the outside line CO1, and is received at the register R in the telephone exchange via the outside line trunk COT and the control line t8. The PIN number received from the register R is read, and it is determined whether or not the PIN number is the correct PIN number stored in the memo'JMK by referring to the ME7IJM (step).

If the received PIN is incorrect, the central processing unit CCU transmits the external trunk COT via the control line t.
, and performs a process of opening the outside line CO1, that is, a disconnection process (g). Furthermore, if the PIN number is not received within a certain period of time (when the calling party does not dial the PIN number), the PIN number is assumed to be incorrect based on the judgment in (v) above.

If the received PIN is correct, K means central processing (22)
The CCU sends a signal tone or message to the outside line C01 via the control line t1 and the outside line trunk COT to indicate completion of reception of the PIN number. After hearing the signal tone or message, the caller of the outside line COM dials the desired extension number, and the number of the extension 1 is transmitted as is to the telephone exchange equipment via the outside line CO1, and then to the outside line trunk C0T1 and the control line. It is received by register R via t1 (a).

The central processing unit CCU reads the extension number received from the register R and checks whether or not this extension number is a regular extension number, that is, whether the received extension number is an existing number and dial-in connection is permitted. It is determined whether or not it is the extension number currently registered by referring to the extension number data registered in the memory M (IJ).

If the received extension number is not a legitimate one, since the extension to be connected is unknown, the central processing unit (22) CCU performs the process of disconnecting the outside line COM in the same way as the control in (g) above.

When the received extension number is a regular number, the central processing unit CCU identifies in which extension terminal the horizontal telephone corresponding to the extension number is accommodated.
. This identification refers to a memory (not shown) that stores system data regarding the extension (this memory is necessary for normal exchange processing and is always provided in computer-controlled telephone exchange equipment). It is done by

Next, the central processing unit 2) CCU determines whether or not the horizontal telephone position identified in the process described above is vacant. To make this determination, refer to the extension monitoring memory (not shown; this extension monitoring memory is also always provided in computer-controlled telephone switching equipment), which stores the current status of each extension. It is carried out by K.

If the horizontal telephone is busy as determined in step (g) above, the central processing unit CCU
Perform cutting process. In addition, when the judgment is "NO" in the above-mentioned judgment (this), and when it is judged as #NO in the judgment of the man, instead of the above-mentioned cutting process of the external line CO1, the external line 001 is regarded as a general external line. In this way, the incoming external line CO1 can be answered at the relay board of the telephone exchange, and the caller may enter the extension number incorrectly. Even if dialed, operator intervention is required.1!
It is possible to connect the outside@CO, to a telephone at the extension number dialed by the caller, and even if the telephone equipment of the extension number dialed by the caller is busy, the outside@CO, can be connected to a nearby telephone without operator intervention. Therefore, it is convenient in terms of navigation. However, if the above judgment is ``NO'', it can be determined that an arbitrary call has been made in many cases, so there is no need to process a general outside line incoming call.

Further, when the corresponding telephone TEI is vacant according to the judgment in (IJ) above, K is the central processing line (22) CCU is the control line t.

The line circuit LC of the horizontal telephone is controlled to send a ringing signal to the telephone in question.) With a control of 0 or more, the caller of the outside line CO1 dials the extension of the telephone exchange by his/her own dialing operation. It is called by specifying directly.

When the telephone is called in the above manner and the phone is placed horizontally to answer, the central processing unit (CCU) connects the control line t.

Detects the response information from the line circuit LC through the dial-in outside #1 ICO1 by controlling the switch circuit SNW.
A connection is made between the outside line trunk COT and the horizontal line circuit LC of the telephone. This is outside the sidaial in #ICO!
The communication path between the terminal and the telephone fi-phone station is completed, and communication between the two is now possible.

With the control explained above, from (a) in Figure 2) or (
The process at the computer is itself a very common dial-in connection process, but in this invention, considering that the caller must dial a PIN number before dialing the extension number, In order to make the user's operations as easy as possible, it is better to have fewer digits in the extension number that follows the password.

By the way, it seems that the extensions that allow dial-in connection are usually limited to some extensions rather than all extensions due to operational reasons. The dial-in connection can also be controlled as follows, focusing on the fact that extensions can be mutually identified using numbers with a small number of digits. In other words, the extension number setting can be changed to the actual extension number for the horizontal phone and the extension number that the outside caller dials for the horizontal phone that allows dial-in connection (hereinafter, this extension number is called the dial-in number). Okay, unless otherwise specified #) When we say "extension number" we are referring to the actual extension number of the telephone horizontally. ) are set separately, and correspondence data between dial-in numbers and extension numbers is stored in the memory M in a table format. The dial-in number can be set to a number with fewer digits than the extension number for the reasons described above.

With the above settings, the number received as an extension from the caller is a dial-in number, so in the process shown in Figure 2), the central processing unit CCU
All you need to do is to first identify the extension number corresponding to the received dial-in number by referring to the correspondence data above, and then click to identify the telephone set corresponding to the extension number.
By associating a dial-in number with a plurality of extension numbers, it is possible to easily control group calls by calling a plurality of telephones in response to an incoming call from a dial-in outside line.

〔Effect of the invention〕

As explained above in detail, the present invention sets a PIN number for a dial-in external line, and allows dial-in connection only when the PIN is correctly sent. This has the effect of preventing a caller from making an arbitrary dial-in call and maintaining a high level of confidentiality.

[Brief explanation of the drawing]

FIG. 1 is a block diagram of the present invention, and FIG. 2 is a flowchart showing control. (Main notes 'gj) co, , co,...Outside line Location...Extension telephone R...Register CCU...Central processing unit M...Memory. Bud 1 diagram

Claims (1)

[Claims] In the dial-in service system of telephone exchange equipment, in which an incoming call from an outside line is automatically answered and then an extension is called by dialing by the caller, a PIN number is entered for the outside line for which the dial-in service is to be performed. After automatically answering the incoming call to the external line, the correctness of the PIN number received by the caller's dial operation is determined, and only when the correct PIN number is received, the caller's PIN number is automatically answered. A dial-in service method in which a dial-in connection is made based on the extension number sent by dialing.