JPH0314394A - Terminating ringing system - Google Patents

Abstract

PURPOSE:To effectively utilize an extension telephone set by providing the terminating ringing system with a means for ringing the extension based on an extension number stored correspondingly to a terminating line when a ringing extension can not be specified by an extension specifying number at the time of its termination. CONSTITUTION:The above system is provided with a memory 15 for storing one or plural extension numbers out of extensions 1 to 5 to be rung in each terminating line or in each specific value. If a ringing extension can not be specified from a subaddress at the time of reading out the subaddress, the extension numbers stored in each terminating line or in each specific value are read out and corresponding extensions 1 to 5 are rung. Thereby, even if the extension to be rung can not be specified by the terminating subaddress, the terminating side can respond to the terminating call without reject it.

Description

[Detailed Description of the Invention] [Field of Industrial Application] The present invention relates to an incoming call ringing system, and particularly to a digital public network (I
The present invention relates to an incoming call ringing method for a telephone switching system connected to the SDN (SDN).

[Conventional technology] With the recent development of communication technology, public lines are being digitized, and various services are now available not only on conventional analog public networks but also on digital public networks (ISDN). . Among other things, when making a call, a subaddress can be added in addition to the other party's line number and sent to the network, so for example, if the other party is a private branch exchange, when the call is received, the subaddress can be read out and a specific extension connected to that private branch exchange can be directly called. is possible.

[Problem to be Solved by the Invention J] However, in the above-mentioned conventional example, when the added called party subaddress is read out, if the extension to be ringed cannot be specified due to a missing number, etc., even if the call is an important requirement, The call was rejected, etc. For this reason, there are drawbacks, such as causing a great deal of trouble and discomfort to the other party, and causing the receiving party to miss out on a major business opportunity, for example.

The present invention was developed to solve the above problems, and
To provide an incoming call ringing method for a telephone exchange system that can answer an incoming call without rejecting the incoming call even when the extension to be ringed cannot be specified based on the incoming subaddress.

[Means for Solving the Problems] In order to achieve the above object, the incoming call ringing system of the present invention has the following configuration. In other words, it is an incoming call ringing method for a telephone switching system that is connected to a digital public network and has a specific means for specifying the ringing extension based on the extension designation number that is sent at the same time when a call is received from the network. and ringing means for ringing the extension based on the extension number stored corresponding to the incoming call line when the ringing extension cannot be specified by the extension designation number.

Further, the incoming call ringing method of another invention is as follows: Incoming call of a telephone switching system that is connected to a digital public network and has a specifying means for specifying the ringing extension based on an extension designation number that is sent at the same time when a call is received from the digital public network. It is a ringing method, and includes a ringing means for ringing an extension based on an extension number stored corresponding to a value obtained by dividing the extension designation number when the ringing extension cannot be specified by the extension designation number when a call arrives. [Function] In the above configuration, a memory is provided to store one or more extension numbers of extensions that should ring for each incoming line or for each specific number, and when the subaddress is read at the time of incoming call,
If the ringing extension cannot be identified from the subaddress, it reads the extension number stored for each incoming line or for each specific numerical value and operates to ring the corresponding extension. [
Embodiments] 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 the structure of a telephone exchange system in a first embodiment. In the figure, 1 to 5 are each extension telephone, 6 is an extension interface, 7 is a call path, and 8 is an ISDN.
Interfaces 9 to 11 are ISDN lines (in this case,
2B+D), 12 is a communication path control unit, 13 is a CPU, 14 is a ROM containing a program,
15 is a RAM containing data, etc. In the following explanation, the extension numbers of the extensions to which the extension telephones 1 to 5 are connected are respectively referred to as "10" to "l4", and the line numbers of the ISDN lines 9 to 11 accommodated are respectively referred to as rl.
J ~ "3".

FIG. 3 is a diagram showing the structure of the incoming ringing extension table in the first embodiment, and this table is stored in the RAM 15. In the figure, 30 is a memory area corresponding to the ISDN line 9, and "1" is stored as the line number. Numerals 31 to 35 are areas for storing the extension numbers of extension telephones that are to ring when there is an incoming call on the line 9. Similarly, 40 corresponds to the number 1110, 50 corresponds to the line 11, and 41 to 45 and 51 to 55 are areas for storing extension numbers to be ringed, respectively. for example,
When a call is received on line 9, the corresponding line number “1”
” to search the above-mentioned incoming ringing extension table and search the extension numbers stored in areas 31 to 35 from memory area 30.
Extensions 10, 11, and 12, that is, extension telephone 1
, 2, and 3, respectively.

Next, the processing procedure at the time of incoming call in the first embodiment will be explained in the second embodiment.
A description will be given below according to the flowchart shown in the figure.

First, in step S20, ISDN lines 9 to l1
When an incoming call is detected via the ISDN interface 8, the process advances from the incoming call waiting state to step S21.
Reads the destination subaddress sent at the same time. Then, the process advances to step S22, and it is determined whether an extension number corresponding to that value has been set. For example, if the destination address is rlOJ, the extension telephone l of that extension number corresponds. As a result, if there is a corresponding extension, the process advances to step S23, and it is determined whether the extension telephone l is free or busy. In this process, the status of the extension telephone 1 is checked via the extension interface 6, and if the result is that it is busy, processing such as rejecting the incoming call is performed in step S24. However, if it is empty, the process advances to step S25,
Take measures to cause the extension telephone l with extension number "10" to ring for an incoming call.

Furthermore, if there is an incoming call on the ISDN line 9 and the called subaddress read in step S21 is rl5J, the extension number corresponding to that value is not set in this telephone switching system, so the determination result in step S22 is It is determined that there is no such thing. The process then proceeds to step S26, and the extension number corresponding to the incoming call line is read out with reference to the incoming call ringing extension table shown in FIG. 3 mentioned above. Specifically, since the incoming line is 9, the table is searched for the line number "1", and "10", "1l", "12" set in areas 3l to 35 of the memory area 30 that match are found. Extract each. In other words, extension telephones 1, 2, and 3 have been selected as the extension telephones to ring. Then, the process advances to step S27, and a process is executed to ring each of the extension telephones 1, 2, and 3 registered in the incoming call ringing extension table. As explained above, according to the first embodiment, even if the extension specified by the called subaddress cannot be identified due to a missing number, etc., by registering the extension that should ring for each incoming line in the table, it is possible to You can also respond to important communications without rejecting them. As a result, communication with the other party is improved and there are effects such as not causing discomfort.

Second Embodiment Next, in the first embodiment described above, 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. A case where there is only one line, such as a basic interface of 28+D or a primary group interface of 23B+D, will be explained as an example.

In the second embodiment, the telephone exchange system accommodates only one ISDN line &I16, and there is only one telephone number to access. Furthermore, in this case, the called subaddress is sent with three digits, and this exchange system interprets the three digits, excluding the first digit and the lower two digits, as indicating the extension number.

FIG. 4 is a diagram showing the configuration of a telephone exchange system according to the second embodiment. Components that are the same as those shown in FIG. Also, Figure 6 shows
The structure is similar to the table for specifying the ringing extension in the first embodiment (see FIG. 3), but in the second embodiment, the upper one of the called sub-addresses is stored in the memory areas 60, 70, and 80, respectively. Store values corresponding to digits, and store each corresponding area 61
~65.71~75.81~85 store the lower two digit extension numbers.

Next, the processing procedure at the time of incoming call in the second embodiment will be explained in the fifth embodiment.
A description will be given below according to the flowchart shown in the figure.

First, in step S50, when an incoming call from the ISDN line 16 is detected via the ISDN interface 8, the process advances from the incoming call waiting state to step S5l, and the called subaddress sent at the same time is read out. Then, the process advances to step S52, and it is determined whether an extension number corresponding to that value has been set. For example, if the host address is lrl10J, the last two digits f l O. Q The extension telephone ■ with extension number C corresponds. As a result, if there is a corresponding extension, the process advances to step S53, and it is determined whether the extension telephone 1 is free or busy. This process is
The status of the extension telephone till is checked via the extension interface 6, and if the result is that it is busy, processing such as refusing the admonition is performed in step S54.

However, if it is empty, the process advances to step S55, and a procedure is performed to cause the extension telephone l with extension number "10" to ring for an incoming call.

Further, there is an incoming call on the ISDN line 16, and step S51
If the called subaddress read in step S5 is rll5J, for example, the extension corresponding to the last two digits 1rl5j is not set in this telephone switching system, so step S5
The determination result in step 2 is determined to be none. and step S
56+ processing is continued, and the extension number corresponding to the upper l digits flJ is read out with reference to the incoming call ringing extension table shown in FIG. 6 mentioned above. In other words, “lO゜゛“l l” set in areas 6l to 65 of the memory area 60 shown in FIG.
, “12” respectively. Then, the process advances to step S57, and a process is executed in which each of the extension telephones 1, 2, and 3 corresponding to the searched extension number rings.

[Effects of the Invention] As described above, according to the present invention, even if the extension to be ringed cannot be specified based on the called subaddress, the incoming call can be answered without being rejected.

Therefore, there is an effect that the extension telephones of the telephone exchange system can be used effectively.

[Brief explanation of drawings]

Fig. 1 is a configuration diagram of the telephone exchange system in the first embodiment, Fig. 2 is a flowchart showing the incoming call processing procedure in the first embodiment, and Fig. 3 is a diagram showing the ringing extension in the first embodiment. Figure 4 is a configuration diagram of the telephone exchange system in the second embodiment; Figure 5 is a flowchart showing the incoming call processing procedure in the second embodiment; Figure 6 is a diagram explaining the table side to be specified; FIG. 7 is a diagram illustrating a table configuration for specifying a ringing extension in a second embodiment. In the figure, 1 to 5... extension telephone, 6... extension interface, 7 call path, 8... ISDN interface,
9 to 1l... ISDN line, 12... call path control unit, . 13...CPU, 14...ROM, 15...
It is RAM. Figure 2 Figure 3 Figure 5 Figure 6

Claims (2)

[Claims] (1) An incoming call ringing method for a telephone switching system that is connected to a digital public network and has a specific means for identifying the ringing extension by the extension designation number that is sent at the same time when a call is received from the network; , a ringing means for ringing an extension based on an extension number stored corresponding to the incoming line when the ringing extension cannot be specified by the extension designation number. (2) An incoming call ringing method for a telephone switching system that is connected to a digital public network and has a specific means for identifying the ringing extension based on the extension designation number that is sent at the same time when a call is received from the network; and a ringing means for ringing an extension based on an extension number stored corresponding to a value obtained by dividing the extension designation number when the ringing extension cannot be specified by the extension designation number. Ring ring method.