JPS63108897A - Dial in service system with number directory - Google Patents

Abstract

PURPOSE:To improve a dial in service by setting a special number of an exten sion number directory and transmitting an extension number directory message to a caller. CONSTITUTION:When there is an incoming from a dial in line wire CO1, a central processing unit CCU automatically responds to the line wire CO1 and transmits a tone or a message for indicating a response to the line wire CO1 through a line wire trunk COT1. The caller dials the number (special number) set for guiding the extension number in response thereto, and then, the unit CCU receives this special number and decides whether said special number is a normal number registered in a memory M or not. When it is normal, the unit CCU transmits the number guide message. Thereby, since the caller transmits a desired extension number, the unit CCU receives it and connects the caller to a relevant telephone set TEL.

Description

[Detailed Description of the Invention] [Field of Industrial Application] The present invention relates to a dial-in service system for telephone exchange equipment, and particularly to a system in which connection to an extension line is performed by dialing by a caller of an outside line. This invention relates to a dial-in service system in which an extension number guidance message is sent to the caller.

[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 line 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, and the caller of the outside line listens to the signal tone and then Dial the desired extension number and
In response to this, the telephone exchange directly connects the incoming external line to the corresponding extension.

[Problem that the invention seeks to solve]

In the conventional dial-in service method described above, it is possible to connect to any extension terminal of the telephone exchange equipment by dialing the extension number of the caller of an outside line. In some cases, it may be extremely inconvenient to be connected to any extension. Furthermore, from the point of view of the caller of the outside line, it is necessary to also remember the extension number, which becomes extremely complicated, especially when the extension number has many digits.

The present invention is proposed to solve the above-mentioned problems.

[Means for solving problems]

In order to solve the above-mentioned problems, the present invention sets a special number for extension number guidance, and after automatically answering an incoming external call, the number guidance is performed by receiving the special number sent by the caller's dial operation. The device is connected to an incoming outside line and an extension number guidance message is sent to the caller.

[Configuration of Example]

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, which receives a dial signal sent from the outside line C, Co, in response to a dial operation by an outside caller, a register R, a memory M which stores various data for dial-in connection, and a voice synthesizer. A telephone number guidance device TK, such as a circuit or tape recorder, which provides voice guidance to the extension number, and a switch circuit SN, which closes the call route.
It is W.

[Effect of the embodiment]

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

In FIG. 1, the outside line CO1 is an outside line that provides dial-in service (hereinafter referred to as a dial-in outside line);
External line CO1 is an external line that does not provide dial-in service (
Hereinafter, it will be referred to as - extramembranous line. ), the operation will be explained below. In the following explanation, symbols written in parentheses indicate correspondence between the explanation of the part and FIG. 2.

When there is an incoming call on the outside line @CO or CO1 (a), a calling signal is sent to the outside line CO3 or CO3.

This call signal is sent to the outside line trunk C0Tt or COT.

CCU receives the paging signal via control line t1, and centrally processes it.
OT, and this identifies the incoming call #i! (
Hereinafter, it will be referred to as the Yuube line. ) Determine whether CO3 or CO1 is a dial-in outside line or a general outside line (mouth).

Usually, a memory (not shown) is installed in the telephone switching equipment to store various system data for the trunk trunk (not limited to the outside line trunk), and the judgment in (b) above is based on this memory. external line trunk COT, or COT.

Please refer to the section below.

If the incoming external line is COt, the external line C
Since O1 is a general outside line, the central processing unit CCU performs incoming call processing for the general outside line (c). That is, for example, if the telephone exchange equipment is equipped with a reception board (relay board), an incoming call from the outside line CO8 will be displayed on the reception desk, and if the telephone exchange equipment is a button telephone device, the reception desk will display the incoming call on the outside line CO8.
The incoming call from the outside line CO□ is displayed on the key telephone in which the CO□ is housed. The above-described incoming call processing for general outside lines is a process that has been conventionally performed in telephone exchange equipment.

In addition, if the incoming external line is an external line 00, the external line C
Since 01 is a dial-in outside line, the central processing unit CCU controls the outside line trunk COT via the control line t1 to automatically answer the incoming call of the outside line CO3.D) The central processing unit CCU responds to the outside line C01 via the outside line trunk COT. It sends out a signal tone or message indicating that something has happened.

The caller connected to the outside line Co, after hearing the above-mentioned signal tone or message, dials a number set for extension number guidance (hereinafter referred to as a special number). This special number is transmitted as it is to the telephone exchange equipment via the outside line 001, and is received at the register R in the telephone exchange equipment via the outside line trunk COT and the control line t1 (e). The central processing unit CCU reads the special number received from the register R, and determines whether or not the special number is a regular special number registered in the memo IJM by referring to the memory M (step).

If the received special number is not a regular one, the central processing unit (CCU) sends the external line trunk C0T via the control line.
1 and performs processing to release the outside line COI, that is, disconnection processing (g). The processing in this (g)K is for the outside line CO1.
may be regarded as a general outside line, and the general outside line incoming process may be performed in the same manner as the process (c) above. In this way, the incoming outside line C01 can be answered at the relay board of the telephone exchange, and even if the caller dials the special number incorrectly, the outside line C01 can be connected to the extension desired by the caller. convenient. still,
When the special number is not received within a certain period of time (when the calling party does not dial the special number), K processes the special number as incorrect based on the judgment in (v) above.

When the received special number is a regular number, K is the central processing unit (CCU) which controls the switch circuit SNW to connect the number guide system TK and the outside line trunk COT.

At the same time, the connection path (a) is closed, and the number guidance device TK is activated via the control line t8, and a number guidance message is sent to the outside line C01 (a). After sending out the directory assistance message, the central processing unit performs dial-in connection processing.

Dial-in connection processing is generally performed as follows. That is, the caller of the outside line C01 learns the desired extension number from the directory guidance message and dials the extension number.

This extension number is directly transmitted to the telephone exchange via the external line CO1, and the telephone exchange receives the extension number at the register R via the external trunk COT and control line t1, and the central processing unit (CCU) The above extension number is read from the register R, the horizontal telephone corresponding to the extension number is identified, and the line circuit LC of the horizontal telephone is connected via the control line t1.
to display an incoming call on the telephone MTE L.

When there is a response when the telephone is placed horizontally, the central processing unit CCU receives response information from the line circuit LC via the control line t,
This controls the switch circuit SNW to close the connection path (b) between the outside line trunk COT and the line circuit LC. As a result, the caller on the outside line CO1 and the horizontal telephone are connected, and a conversation between the two becomes possible.

The above general dial-in connection processing can be applied when the telephone exchange equipment is relatively small and there are relatively few extensions for dial-in connection. However, in large-scale telephone exchange equipment, the extension number guidance message becomes long. Therefore, the general dial-in connection processing described above cannot be said to be appropriate. An example of dial-in connection processing that can be implemented in a large-scale telephone exchange will be described below.

First, regarding setting the extension number, the actual extension number on the horizontal phone and the extension number sent in the directory assistance message and dialed by the caller (hereinafter, this extension number is referred to as the dial-in number, unless otherwise specified) When we refer to "extension number", we refer to the actual extension number of the horizontal telephone.)
and store the correspondence data between dial-in numbers and extension numbers in a table format in the memo IJM. Then, the data stored in the memory M is set so that a plurality of extension numbers correspond to one dial-in number.

That is, for example, one dial-in number is set for each department, and all telephones in each department or telephones that require dial-in incoming calls are associated with that dial-in number as a group.

By doing this, the number of dial-in numbers that are fewer than the number of extension numbers need be provided in the directory assistance message, which is convenient.

In the above case, the telephone exchange receives the dial-in number from the caller, so the central processing
U identifies all extension numbers belonging to the group of dial-in numbers received by referring to memory M, and displays an incoming call display on all telephones that correspond to the extension number and are not busy. Alternatively, a priority order may be set for the telephones constituting the group, and the incoming call display may be performed on the telephone with the highest priority among the available telephones.

Alternatively, a method may be adopted in which a plurality of special numbers are used and the contents of the directory guidance message are different for each special number. That is,
For example, if one special number is set for each department, the extension number only needs to be announced for the department that corresponds to the special number, so the number guidance message can be shortened. In this case, extension numbers are stored separately for each special number in the directory assistance device TK, and the central processing
When the CU receives the special number from the caller, it sends the number assistance device TK.
O Select the section corresponding to the above special number and control to send a message informing the extension number within the section.

After receiving the extension number from the caller, the general dial-in connection processing described above may be performed.

Furthermore, the number guidance message to the calling party and the dialing operation by the calling party may be performed in two steps. In other words, when a special number is received from a caller, the number assistance device TK
First, for example, an identification number for each department is provided, and then, when the caller dials the identification number of the desired department, the number guidance device TK provides information on the extension number within that department. To control in this way, perform the processes (e) to (f) in FIG. ). The dial-in connection process in this case may be the general dial-in connection process described above.

〔Effect of the invention〕

As described above in detail, the present invention is designed to provide voice guidance for an extension number upon reception of a special number from a dial-in outside line, and has the following effects.

- Since only those who know the special number can receive the dial-in service, arbitrary dial-in calls by third parties can be prevented.

(2) Since the calling party is informed of the extension number, there is no need for the calling party to memorize the extension number in advance, and it is also possible to make a call by dialing in to an extension for which the extension number is unknown.

The fcl special number usually has fewer digits than an extension number, so it is easy to remember, and when extremely high confidentiality is required, it can be easily handled by increasing the number of digits in the special number.

[Brief explanation of the drawing]

FIG. 1 is a block diagram of an embodiment of the present invention, and FIG. 2 is a flow chart showing control. (Main symbols) CO,, Co,... External line Place... External line Filling machine T
K...Number guide device CCU...Central processing unit R...Register M...Memory. Banknote 1 Figures 11-13-1 made n heel

Claims (1)

[Scope of Claims] 1. In a dial-in service system of a telephone exchange device in which an incoming call from an outside line is automatically answered and then an extension is called by a dialing operation performed by the caller, an extension number guidance system is provided. After setting a special number and automatically answering incoming outside calls,
A number that connects a directory assistance device to the incoming external line upon reception of the special code sent to the incoming external line by dialing by the caller, and sends an extension directory guidance message to the calling party. Guided dial-in service method. 2. A dial-in service system with directory guidance according to claim 1, wherein the extension numbers to be guided are divided into a plurality of groups and a different special number is assigned to each group.