JPH0366880B2 - - Google Patents

Description

[Detailed Description of the Invention] [Field of Industrial Application] The present invention relates to a direct in-dial system in a telephone exchange device such as a private branch exchange or a key telephone device, and particularly relates to a direct in-dial service for group calling of extensions. This is related to the method introduced.

[Prior Art] A direct in-dial service is known in which an incoming call from an outside line is directly displayed on a specific extension telephone of a telephone exchange, and when the extension telephone responds, the outside line is directly connected to the extension telephone.
Note that this service is also called a dial-in service.

In the conventional direct in-dial service (hereinafter referred to as DID service), the external line to which the DID service is attached (hereinafter referred to as DID external line)
When a call is received on the DID external line, the telephone exchange responds to the call and sends the response information to the central office.
When the telephone office receives the response information, it sends a direct in-dial number (hereinafter referred to as a DID number) to the telephone exchange. The telephone exchange displays an incoming call on the extension telephone corresponding to the DID number received from the outside line, and in response to the response from the extension telephone, connects the outside line directly to the extension telephone.

[Problems to be Solved by the Invention] As explained above, conventionally there is only one extension telephone that corresponds to a DID number. When an incoming call is received, the incoming call is disconnected during the call or is treated as a general incoming call and connected to a relay stand or the like.

Since the extension telephone of a telephone exchange equipment makes calls to internal lines in addition to calls to external lines, there is a high probability that it will be busy, unlike so-called standalone telephones that are directly connected to external lines. There is also a high probability that you will not be able to connect to your phone.

One possible solution to this problem is to introduce the conventional representative number incoming call method to the DID service, and to treat incoming calls from DID external lines as group calls.

By the way, in the conventional group call receiving system, in order to associate a group number with multiple extension numbers, it is common to use a table in which multiple memory areas are set for each group number. In the table, the number of extension numbers that can be set within the same group is limited by the number of memory areas, and there is a problem that it is not possible to respond flexibly to group settings.

The present invention is proposed to solve the above-mentioned problems, and aims to provide a direct in-dial system that enables more flexible group settings for group incoming calls in DID services.

[Means for Solving the Problems] For the above purpose, the present invention provides a DID number and a corresponding
A first memory stores data indicating whether the DID number corresponds to a group and one extension number within the group, and stores the extension number and group number in correspondence. A second memory is provided, and when an incoming call occurs on the DID external line, the first memory is first referred to and the incoming call is detected.
Determine whether the DID external line is an incoming call to a group, and if it is an incoming call to a group,
After identifying the extension number corresponding to the incoming call stored in the first memory, referring to the second memory, identifying all the extension numbers corresponding to the group number to which the identified extension number belongs, and The incoming call is connected to any or all of the available extension telephones corresponding to the identified extension number.

[Configuration of Embodiment] FIG. 1 is a block diagram of an embodiment of the present invention, and FIG. 2 is a diagram showing the configuration of a table (memory) used in the embodiment.

As shown in Figure 1, the switch circuit SNW has an extension telephone (hereinafter referred to as telephone) TEL ₀ ~
REL ₃₀ , reception telephone or relay stand (hereinafter, the reception telephone is taken as an example) TEL _M and outside lines CO ₀ to CO ₄ are extension circuits LC ₀ to LC ₃₀ , LC _M and outside line trunk, respectively.
It is accommodated through COT ₀ to COT ₄ .

Telephones TEL ₀ to TEL ₂₉ are divided into groups of 10, and telephone TEL ₃₀ does not belong to any group.

In addition, external lines CO ₀ to _{CO 4} include DID external lines and general external lines (external lines to which DID service is not provided), and DID external lines are the above telephones TEL ₁ to CO 4.
It is associated with the TEL ₂₉ group or the telephone TEL ₃₀ that does not belong to any group. Now, outside lines CO ₀ to _{CO 3} are assumed to be DID outside lines, and outside line CO ₄ is assumed to be a general outside line. Also, outside line CO ₀ is telephone TEL ₀ ~ TEL ₉
(hereinafter referred to as the first group),
The outside line CO ₁ belongs to the group of telephones TEL ₁₀ to _{TEL 19} (hereinafter referred to as the second group), the outside line CO ₂ belongs to the group of telephones TEL ₂₀ to _{TEL 29} (hereinafter referred to as the third group), and the outside line CO ₃ belongs to the group of telephones TEL 10 to TEL 19 (hereinafter referred to as the third group). It is assumed that each is associated with a telephone TEL ₃₀ . Note that the number of telephones accommodated, the number of groups, the number of telephones constituting each group, the number of accommodated outside lines, etc. described above are merely examples, and can be changed as appropriate depending on operating conditions. Also,
The number of telephones constituting each group may be different among the groups.

In addition, the above switch circuit SNW, extension circuit LC ₀
~ _LC30 , _LCM , and outside line trunks _COT0 ~ _COT4 are provided with a central processing unit CCU mainly composed of a so-called 1-chip CPU, and further includes a memory according to the present invention. ,
A table M made up of RAM or EPROM is provided.

Next, the configuration of table M will be explained. For this explanation, the extension numbers of telephones TEL ₀ to _{TEL 30} are respectively "210" to "240", and the external lines COT ₀ to
Let the DID numbers of COT ₃ be “21” to “24”, respectively.

As shown in FIG. 2, table M is composed of two tables M ₁ and M ₂ , and table M ₁ is
It has a storage section for storing data indicating whether or not the DID number forms a group (hereinafter referred to as group data) and a storage section for storing one extension number for each DID number. ,Also,
Table _M2 has a storage section for storing, for each extension number, the number of the group to which the corresponding extension number belongs. According to the above number and group setting example, in table _M1 , each DID number "21" to "24"
Group data "1", "1", "1" and "0" are stored in the group data storage section, and one of the extension numbers belonging to the first to third groups is stored in the extension number storage section.
extension numbers “210”, “220”, “230” and “240”
are stored respectively, and in table _M2 , each extension number "210" to
Numbers "1" to "3" of the group to which "239" belongs are stored in the group number storage section. In Table _M1 , group data "1" indicates that the corresponding DID number forms a group, and group data "0" indicates that the corresponding DID number does not form a group. There is. In addition, the extension number stored in the table _M1 is any one extension number within the group for those that form a group, and the extension that corresponds to the DID number for those that do not form a group. It's a number.

[Operation of the embodiment] FIG. 3 is a flowchart showing the processing of the embodiment. In the following explanation, symbols in parentheses indicate correspondence with the above flowchart.

When an incoming call occurs on any of the outside lines CO ₁ to CO ₄
(b) The central processing unit CCU receives the incoming call information from the external line _trunk (any of COT ₀ to _{COT 4} ) corresponding to the external line where the incoming call occurred via the control line (hereinafter referred to as an incoming external line) is a DID external line (b).

When the incoming call is on the outside line CO ₄ , since the outside line CO ₄ is a general outside line, the central processing unit CCU performs incoming call processing for the general outside line (c). Incoming call processing for a general outside line means, for example, displaying an incoming call on the reception telephone TEL _M. That is, the central processing unit CCU controls the extension circuit _LCM via the control line _l2 , and emits a ringing tone from the audible display means (ringing bell or equivalent means) of the reception telephone TEL _M. While this process continues, the intermediate treatment unit
As before, the CCU monitors the call abandonment of the incoming external line CO ₄ and the response of the reception telephone TEL _M.
(li) Switch circuit in response to reception telephone TEL _M
Control SNW to receive incoming external line CO ₄ and reception telephone TEL _M
Connect with.

If the incoming external line is one of the external lines CO ₀ to _{CO 3} , the external lines CO ₀ to _{CO 3} are DID external lines, so
The central processing unit CCU performs direct in-dial control (hereinafter referred to as DID control) between incoming external lines and incoming calls.
Do (d). That is, the central processing unit CCU
performs response control on the external line trunk (any one of COT ₀ to COT ₃ ) corresponding to the incoming external line via the control line _l1 , and sends response information to the incoming external line. When the telephone office to which the incoming external line belongs receives the response information, it sends the DID number to the incoming external line, and the central processing unit CCU receives the DID number via the control line _l1 . The above is DID control.

When the central processing unit CCU receives the DID number, it determines whether a corresponding extension number exists (e). This judgment is a control established in consideration of cases such as when there is an error in the DID number sent from the telephone office, or when the telephone corresponding to the DID number is disconnected and its extension number is deleted. . If this judgment indicates that there is no extension number, the same general outside line incoming process or busy disconnection process (processing to send a busy tone to the caller) as in the process (c) above is performed (f).
Note that in this process (f), general outside line incoming processing is better than busy disconnection processing from a service standpoint. That is, by having the reception telephone TEL _M receive the call, for example, the reception telephone TEL _M can answer and then transfer the call to the extension desired by the caller. In addition, in this process (f), if the general outside line incoming process is used, after this process, the process (i) is performed in the same manner as above.

If it is determined that there is an extension number corresponding to the DID number based on the judgment in (e) above, the central processing unit CCU determines whether or not the destination telephone corresponding to the DID number sent from the incoming external line forms a group. (nu). This determination is made depending on whether the group data in the group data storage section of table _M1 is "1" (when a group is formed) or "0" (when a group is not formed).

When the above group data is “0”, i.e.
For example, when the DID number is “24” (the incoming outside line is CO ₃
), individual call reception processing is performed as follows.

First, the central processing unit CCU has DID number “24”
The extension number "240" is read out from the extension number storage area corresponding to the extension number "240", and it is determined whether the telephone TEL ₃₀ corresponding to the extension number "240" is vacant or not. (e) If it is determined that the telephone TEL ₃₀ is busy, the central processing unit CCU performs general outside line incoming processing or busy disconnection processing (f).
When it is determined that the telephone TEL ₃₀ is free, incoming calls to the telephone TEL ₃₀ are processed (wa).

In the above judgment (J), when the group data is "1", that is, the DID number is "21", for example.
When (when the incoming outside line is CO ₀ ), group incoming call processing is performed as follows.

The central processing unit CCU first has a DID number “21”
Search for the group number corresponding to (f). This search reads the extension number "210" from the extension number storage area corresponding to the DID number "21" in table M ₁ , and then reads the group number from the group number storage area corresponding to the extension number "210" from table M ₂ . This is done by reading out the number "1".

Next, the central processing unit CCU searches the table _M2 for the extension number corresponding to the group number "1" (Y). That is, in table _M2 , all group number storage areas in which group number "1" is stored are detected, and the extension numbers to which the area is assigned, in this case "210" to
Identify “219”. Next, the central processing unit CCU
determines whether there are any vacant telephones TEL ₀ to TEL ₉ corresponding to the identified extension numbers "210" to "219" (G). This determination can be easily made using known control such as searching an extension monitoring memory (not shown). When all of the above telephones TEL ₀ to TEL ₉ are busy, the central processing unit CCU performs general outside call processing or busy disconnection processing in the same way as above.
(mosquito). Here, if the process in (f) is the general outside line incoming process, the transition to the process in (li) is the same as in the determination in (e) above.

Further, when there is an unoccupied telephone among the telephones TEL ₀ to _{TEL 9} , the central processing unit CCU performs incoming call processing to the unoccupied telephone (H). That is, the extension circuit (in this case, any one of LC ₀ to LC ₉ ) of a vacant telephone is controlled via the control line l ₂ to cause the audible display means of the telephone to ring. This incoming call processing may be performed on all available telephones, or it may be performed on the telephone with the highest priority among the available telephones by setting so-called priorities within the same group. .

In addition, after processing an incoming call to one of the telephone offices (i.e., when the processing of (c), (h), (wa) or the processing of (f) is used to process a general outside line incoming call), the central processing unit
The CCU monitors the abandonment of outside lines and monitors telephone responses (Re).

According to the table configuration in the above embodiment, a table in which areas are set corresponding to extension numbers
DID by storing the group number in _M2
Since it is possible to configure groups corresponding to numbers, there is no restriction on the number of telephones that can constitute one group, and the degree of freedom in configuring the group call reception of the DID service is extremely large.

In addition, it is easy to change groups or change the extensions belonging to a group (in general, it is easier to rewrite group numbers than to control the rewriting of extension numbers), and the extension monitoring memory (computer-controlled If there is enough storage area for the telephone exchange equipment (which is always provided in telephone exchange equipment), you can create a table by providing a group number storage area in the extension monitoring memory without requiring any new memory.
M ₂ can be configured, and in this case, only table M ₁ , which requires less capacity, needs to be newly provided.

[Effects of the Invention] As explained above, the present invention provides the following advantages when introducing group calling of extensions to the DID service.
The table that sets the correspondence between DID numbers, group numbers, and extension numbers is divided into two parts: one is the DID number, one is the data of whether it is a group, and the other is the one in the group.
The correspondence between the extension number and the group number is set, and the correspondence between the extension number and the group number is set on the other hand.
This has the effect of providing a DID service system that has an extremely high degree of freedom in group setting, and in which it is extremely easy to change groups and change extension numbers belonging to groups.

[Brief explanation of drawings]

The drawings are for explaining an embodiment of the present invention, and FIG. 1 is a block diagram, FIG. 2 is a diagram of the structure of a table, and FIG. 3 is a flowchart for explaining the operation. (Main symbols) TEL ₀ to TEL ₃₀ ...Extension telephone,
CO ₀ to CO ₄ ...external line, M (M ₁ , M ₂ ) ... table.

Claims (1)

[Scope of Claims] 1. A direct dial number is made to correspond to a specific extension telephone or a group consisting of a plurality of extension telephones, and when a direct in-dial call occurs, the direct in-dial number corresponding to the incoming direct in-dial number is assigned to a specific extension telephone or within the group. In the direct in dialing method in which the above incoming call is connected to any or all of the vacant telephone extensions in a first memory storing data indicating whether the telephone corresponds to one of the telephone extensions and the extension number of the specific extension telephone or the extension number of one extension telephone belonging to the group;
It has a second memory that stores extension numbers and group numbers in correspondence, and when a direct in-dial call occurs,
First, by referring to the first memory, it is determined whether the incoming call is an incoming call to a specific extension telephone or a group, and if the incoming call is an incoming call to a specific extension telephone, the incoming call stored in the first memory is handled. When the incoming call is for a group, the extension number corresponding to the incoming call stored in the first memory is identified, and the second memory is referred to and the incoming call is A direct in-dial system that identifies all extension numbers corresponding to the group number to which the identified extension number belongs, and connects the incoming call to any or all of the available extension telephones corresponding to the identified extension number. method.