JPH0443479B2 - - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION (Field of Industrial Application) The present invention relates to a central office line terminating system that performs display and response connection corresponding to an incoming call from a central office line in a private branch exchange.

(Prior Art) Conventionally, in business telephone services such as private branch exchange telephones and office group telephone services, incoming calls are received from a central office line to a private branch exchange, and the incoming call is displayed on a relay stand on the central office line, and the operator enters the phone key. relay stand system, in which the incoming call is displayed on the tone ringer and lamp on the station line display panel, and a distributed response system, in which the incoming call is answered and connected by operating one of the extension telephones;
The direct in-line method calls directly to the corresponding extension and operates the telephone of the corresponding extension to answer and connect, as well as the direct in-line method, which receives selection numbers sent from the central office line to specify the destination extension, and directly calls the corresponding extension. There are dial-in methods, etc. in which you answer and connect by operating the telephone of the corresponding extension.

In addition, in these incoming call methods, the office line is divided into multiple groups, and a relay stand and extension line group corresponding to each office line group are provided, and for incoming calls to each office line group, a relay stand corresponding to the office line group is installed. In some cases, a so-called tenant function is applied, which allows responses only from a group of extensions.

When this tenant function is applied, multiple users (offices) can share one private branch exchange as if each user were using their own exchange. Compared to the case where users install the exchanges individually, maintenance of the exchanges can be unified, the installation space can be reduced, and the exchanges can be used economically.

(Problem to be Solved by the Invention) However, in the conventional system, the office line corresponding to each tenant is identified by tenant information that is assigned a trunk for each office line, and each tenant occupies these office lines. Therefore, especially when there are many tenants and the number of office lines per tenant is small, division losses occur and the office lines cannot be used effectively, even though the entire exchange accommodates a sufficient number of office lines. There was a problem that I couldn't do it.

The present invention solves the above problems, and even when the number of tenants is large and the number of station lines per tenant is small,
The purpose of the present invention is to provide a central office line receiving system that makes effective use of central office lines.

(Means for Solving the Problem) In order to achieve the above object, the present invention divides the extension lines of a private branch exchange capable of dial-in connection into a plurality of groups (tenants), and incoming calls from the central office line for each tenant are In a central office line receiving system that connects to an extension within a tenant, receiving means receives selected numbers of the extension sent from the central office line for dial-in connection, and a tenant that accommodates the selected numbers of the extension and the extension. A tenant number table showing the correspondence with the number of
an incoming call display means for displaying an incoming call from a central office line, reads the tenant number corresponding to the selected number of the extension received by the receiving means from the tenant number table, and operates the incoming call display means for the corresponding tenant; The central office line was connected to the responding extension within the tenant.

(Operation) According to the present invention, when an incoming call occurs and the selection digits of the extension are sent from the central office line, the receiving means receives the call, reads out the tenant number corresponding to the selection digit from the tenant number table, and reads the corresponding number from the tenant number table. The incoming call is displayed on the incoming call display means of the tenant, and when there is a response from the extension within the tenant, the central office line is connected to the extension.

(Embodiment) Fig. 1 is a block diagram of an exchange showing an embodiment of the method of the present invention.
NW is a communication path, REC is a receiving means (receiving circuit) for selected numbers of extensions, TN1, TN2, and TN3 are multiple tenants provided in the exchange, here three tenants,
COID1, COID2, COID3 are the tenants TN1, TN2 for displaying incoming calls from the central office line,
Incoming call display means (office line display panel) installed for each TN3, EXT1, EXT2, EXT3 are tenant TNs
Extensions accommodated in 1, TN2, and TN3, respectively,
CPU is the central processing unit.

Figure 2 shows a tenant number table stored in the storage device (not shown) of the central processing unit CPU.
This indicates TNNCNV, and the number of the tenant (tenant number) that accommodates the extension is recorded in advance in correspondence with the selection number of the extension sent from the central office line. In addition, here, the tenants TN1, TN2,
The tenant numbers of TN3 are "1", "2", and
Set it to "3". Furthermore, there is no problem with the selection number of this extension even if the extension does not exist.

Next, the operation will be explained according to FIG.

When there is an incoming call on the first central office line, the central processing unit CPU
As shown in 3a, the central office line incoming trunk BWT accommodating the central office line is connected to the receiving circuit through the communication path NW.
Connect to REC. Further, the central processing unit CPU receives the selection number of the extension, for example "123", sent from the central office line via the receiving circuit REC.
Further, the central processing unit CPU refers to the selected number "123" section of the tenant number table TNNCNV and obtains the corresponding tenant number, for example "2".

Based on the obtained tenant number "2", the central processing unit CPU directly displays an incoming call on the office line display panel COID2 in tenant TN2 by lighting a lamp and generating a signal sound, as shown in Figure 3b. . For this incoming call, extension EXT in tenant TN2
If there is a response such as special number dialing from 2, the central office line incoming trunk BWT and the corresponding extension are sent as shown in 3c.
Connects to EXT2 via communication path NW and performs response connection for incoming calls from the central office line.

Also, if the tenant number corresponding to the received selected number is "1" or "3", the tenant TN
1 or TN3 station line display board COID1 or COID
3 will display an incoming call, and at this time, the extension number will also be displayed.
If there is a response from EXT1 or EXT3, the call path will be established.
Trunk BWT for incoming central office line and extension line via NW
Connect with EXT1 or EXT3.

In this way, according to the embodiment, one central office line can be shared by multiple tenants, and there is no need to divide the central office line for each tenant, and one trunk can be used to connect multiple tenants. It is now possible to receive calls.

In addition, in the above embodiment, an example was shown in which an incoming call dialed in is displayed for each tenant using the distributed call reception method, but the same principle applies to the relay stand method and dial-in method when the tenant function is used. It can reduce line splitting loss.

Furthermore, the selection number of an extension received from a central office line can be set regardless of whether the extension actually exists or not, providing flexibility in terms of number planning.

(Effects of the Invention) As explained above, according to the present invention, the receiving means receives the selected digits of the extension sent from the central office line for dial-in connection, and the tenant corresponding to the selected digits of the extension is received. The number is read from the tenant number table, the incoming call display means of the corresponding tenant is operated and displayed, and the central office line is connected to the responding extension within the tenant.
Unlike in the past, where each office line was designated by a tenant and tenant identification information was provided for each trunk that housed the office line, the office line can be shared by each tenant, eliminating the loss of division and It is possible to reduce the number of central office lines used by the entire tenant, thereby reducing the amount of necessary switching hardware and reducing central office line usage fees. It has advantages such as being able to construct a switching system.

[Brief explanation of drawings]

FIG. 1 is a configuration diagram of an exchange showing an embodiment of the method of the present invention, FIG. 2 is an explanatory diagram showing an example of a tenant number table, and FIGS. 3 a, b, and c are explanatory diagrams showing connection processing. be. BWT... Trunk for incoming central office line, NW... Call path, REC... Receiving circuit, TN1, TN2, TN3
...Tenant, COID1, COID2, COID3...
Station line display panel, EXT1, EXT2, EXT3...extension lines, CPU...central processing unit.

Claims (1)

[Scope of Claims] 1. A central office line incoming call method in which the extensions of a private branch exchange capable of dial-in connection are divided into a plurality of groups (tenants), and incoming calls from the central office line for each tenant are connected to the extensions within the corresponding tenant. , a receiving means for receiving selected digits of an extension sent from a central office line for dial-in connection; and a tenant number table showing a correspondence between the selected digits of the extension and the number of the tenant accommodating the extension. , an incoming call display means installed for each tenant and displaying an incoming call from the central office line, reads the tenant number corresponding to the selected number of the extension received by the receiving means from the tenant number table, and displays the number of the corresponding tenant. A central office line receiving system characterized in that an incoming call display means is operated and a central office line is connected to the responding extension within the tenant.