JP2760844B2 - Telephone equipment - Google Patents

Description

Description: BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a telephone apparatus for calling an extension terminal having an extension number corresponding to an extension designation number sent from a digital public network when receiving an incoming call.

[Prior Art] With the development of communication technology in recent years, public lines have been digitized, and various services have become available not only in conventional analog public networks but also in digital public networks (ISDN). . Above all, at the time of outgoing call operation, the subaddress can be added to the network in addition to the other party's line number. Is possible.

[Problem to be Solved by the Invention] However, in the above conventional example, when the extension to be ringed cannot be specified due to, for example, a missing number when the added destination address is read, even if the call is an important requirement. Processing such as rejecting the incoming call was performed. For this reason, there are drawbacks such as giving a great deal of inconvenience and discomfort to the other party, and, for example, missing a large business opportunity on the receiving side.

The present invention has been made in order to solve the above-mentioned problem, and when there is no extension terminal having an extension number corresponding to an extension designation number sent at the time of an incoming call, when a predetermined digit in the extension designation number is used, It is an object of the present invention to provide a telephone device that can handle an incoming call without rejecting an incoming call by calling an extension terminal having an extension number stored in a storage means.

[Means for Solving the Problems] In order to achieve the above object, the present invention provides a telephone device for calling an extension terminal having an extension number corresponding to an extension designation number transmitted from a digital public network when receiving a call. A storage means for storing an extension number corresponding to a predetermined digit of the extension designation number; and an extension when there is no extension terminal having an extension number corresponding to the extension designation number sent at the time of incoming call. Calling means for calling an extension terminal having an extension number stored in the storage means in correspondence with a predetermined digit of the designated number.

Preferably, the extension designation number is a destination sub-address sent from the digital public network upon receiving a call, and a predetermined digit of the extension designation number is the upper one digit of the destination sub-address. And

More preferably, the storage means stores a value corresponding to the upper one digit of the destination subaddress, and an extension number is stored in each corresponding area.

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

<First Embodiment> FIG. 1 is a diagram showing a configuration of a telephone exchange system according to a first embodiment. In the figure, 1 to 5 are extension telephones, 6 is an extension interface, 7 is a communication path, 8 is an ISDN interface, 9 to 11 are ISDN lines (in this case, a basic interface indicated by 2B + D), and 12 is a communication path Control unit, 13 is CP
U and 14 are ROMs containing programs, and 15 is a RAM containing data and the like.

In the following description, the extension numbers of the extensions connected to the extension telephones 1 to 5 are respectively "10" to "14", and the line numbers of the accommodated ISDN lines 9 to 11 are "1" to "3", respectively.
And

FIG. 3 is a diagram showing the configuration of a ringing extension table according to the first embodiment. This table is stored in the RAM 15. In the figure, reference numeral 30 denotes a memory area corresponding to the ISDN line 9, and "1" is stored as the line number. Then, if there is an incoming call on that line 9,
This area stores the extension number of the extension telephone to be ringed. Similarly, 40 corresponds to line 10, 50 corresponds to line 11, 41 to
Reference numerals 45 and 51 to 55 denote areas for storing extension numbers to be sounded. For example, when there is an incoming call on the line 9, the above-mentioned incoming call ringing extension table is searched for the corresponding line number "1", and the extension numbers "10", "" stored in the memory areas 30 to 31 to 35 are searched. The incoming call ringing process is performed on the extensions 11 "and" 12 ", that is, the extension telephones 1, 2, and 3, respectively.

Next, a processing procedure at the time of an incoming call in the first embodiment will be described below with reference to a flowchart shown in FIG.

First, in step S20, when an incoming call from the ISDN lines 9 to 11 is detected via the ISDN interface 8, the process proceeds from the incoming call waiting state to step S21, and the destination subaddress sent at the same time is read. And step S2
The process proceeds to 2 to determine whether an extension number corresponding to the value has been set. For example, the destination address is "10"
If so, the extension telephone 1 of that extension number corresponds. As a result, if there is a corresponding extension, the process proceeds to step S23, and it is determined whether the extension phone 1 is empty or busy. This processing is performed by the extension telephone 1 via the extension interface 6.
Is checked, and if it is busy, processing such as rejecting the incoming call is performed in step S24. However, if it is empty, the process proceeds to step S25, and a process for ringing the extension telephone 1 having the extension number "10" is performed.

If there is an incoming call on the ISDN line 9 and the destination subaddress read out in step S21 is "15", the extension number corresponding to that value is not set in the telephone exchange system, so the determination in step S22 is made. It is determined that there is no result. Then, the process proceeds to step S26, and the extension number corresponding to the incoming line is read out with reference to the incoming call extension table shown in FIG. More specifically, since the number of the incoming line is 9, the table is searched with the line number “1”, and “1” set in the areas 31 to 35 of the memory area 30 that matches is searched.
0 "," 11 ", and" 12 "are extracted respectively, that is, the extension telephones 1, 2, and 3 are selected as the extension telephones to ring. A process for ringing the registered extension telephones 1, 2, and 3 is executed.

As described above, according to the first embodiment, even if the extension specified by the destination subaddress cannot be specified due to a missing number or the like, the extension to be ringed for each incoming line is registered in the table, so that the incoming call can be received. It can respond to important communications without rejection. As a result, there is an effect that communication with the opponent is separated and discomfort is not given.

Second Embodiment Next, in the above-described first embodiment, a ringing extension is specified for each line number of a plurality of incoming lines, but in the second embodiment, the ISDN shown in FIG. An example will be described in which only one line such as a basic interface of 2B + D or a primary group interface of 23B + D is used.

In the second embodiment, only one ISDN line 16 is accommodated in the telephone exchange system, and only one telephone number is accessed. In this case, the destination subaddress is 3
The exchange system interprets that the lower two digits excluding the upper one digit of the three digits indicate the extension number assuming that the digits are sent.

FIG. 4 is a diagram showing the configuration of the telephone exchange system according to the second embodiment. The same components as those shown in FIG. 1 are denoted by the same reference numerals, and a description thereof will be omitted. FIG. 6 has the same configuration as the table (see FIG. 3) for specifying the ringing extension in the first embodiment, but in the second embodiment,
In the memory areas 60, 70, and 80, values corresponding to the upper digit of the destination sub address are stored, and the corresponding areas 61 to 65, 7 are stored.
1 to 75 and 81 to 85 store extension numbers of lower two digits.

Next, a processing procedure at the time of an incoming call in the second embodiment will be described below with reference to a flowchart shown in FIG.

First, in step S50, when an incoming call from the ISDN line 16 is detected via the ISDN interface 8, the process proceeds from the incoming call waiting state to step S51, and the destination subaddress sent at the same time is read. Then, the process proceeds to step S52 to determine whether an extension number corresponding to the value is set. For example, if the destination subaddress is "11
If "0", the last two digits "10" are the extension phone 1 of the extension number
Corresponds. As a result, if there is a corresponding extension, step
The process proceeds to S53, and it is determined whether the extension telephone 1 is empty or busy. In this processing, the state of the extension telephone 1 is checked via the extension interface 6, and as a result, if it is busy, processing such as rejecting the incoming call is performed in step S54. However, if it is empty, the process proceeds to step S55, and a process for ringing the extension telephone 1 with the extension number "10" is performed.

If there is an incoming call on the ISDN line 16 and the destination subaddress read out in step S51 is, for example, "115", the extension corresponding to the last two digits "15" is not set in the telephone switching system. It is determined that there is no determination result in step S52. Then, the process proceeds to step S56, and the extension number corresponding to the upper one digit "1" is read out with reference to the incoming call extension table shown in FIG. That is, "10", "11", and "12" set in the areas 61 to 65 of the memory area 60 shown in FIG. 6 are respectively read. Then, the process proceeds to step S57 to execute a process of ringing the extension telephones 1, 2, and 3 corresponding to the searched extension number.

[Effects of the Invention] As described above, according to the present invention, when there is no extension terminal having an extension number corresponding to the extension designation number sent at the time of incoming call, a predetermined digit of the extension designation number By calling the extension terminal having the extension number stored in the storage means in response to the call, it is possible to respond without rejecting the incoming call.

[Brief description of the drawings]

FIG. 1 is a block diagram of a telephone exchange system according to a first embodiment, FIG. 2 is a flowchart showing an incoming call processing procedure in the first embodiment, and FIG. 3 is a ringing extension in the first embodiment. FIG. 4 is a diagram showing the configuration of a telephone exchange system according to a second embodiment, FIG. 5 is a flowchart showing an incoming call processing procedure according to the second embodiment, FIG. FIG. 9 is a diagram illustrating a table configuration for specifying a ringing extension in the second embodiment. In the figure, 1 to 5: extension telephones, 6: extension interface, 7 communication paths, 8: ISDN interface, 9 to 11 ...
ISDN line, 12 ... Channel control unit, 13 ... CPU, 14 ... R
OM, 15 ... RAM.

Claims (3)

(57) [Claims] 1. A telephone apparatus for calling an extension terminal having an extension number corresponding to an extension designation number sent from a digital public network when receiving an incoming call, wherein the telephone device corresponds to a predetermined digit of the extension designation number. Storage means for storing an extension number, and when there is no extension terminal having an extension number corresponding to the extension designation number sent at the time of the incoming call, the storage corresponding to a predetermined digit of the extension designation number Telephone means for calling an extension terminal having an extension number stored in the means. 2. The extension designation number is a destination sub-address sent from the digital public network at the time of an incoming call, and a predetermined digit of the extension designation number is an upper one digit of the destination sub-address. The telephone device according to claim 1, wherein 3. The telephone according to claim 2, wherein the storage means stores a value corresponding to the upper one digit of the destination sub-address, and an extension number is stored in each corresponding area. apparatus.