JP2000201220A - Incoming call connection system - Google Patents

Abstract

PROBLEM TO BE SOLVED: To limit the number of lines which can connect a call even if same incoming information are simultaneously received from plural lines at the time of an incoming call in the line notifying incoming information. SOLUTION: In a private exchange 100 storing plural lines such as dial-in lines and extension terminals, which notify incoming information of an incoming number at the time of an incoming call, a station subscriber telephone set 108 dials a line number decided in a public network 107, which corresponds to a central office 104. Thus, the incoming signal arrives at the central office 104 and the private branch exchange 100 recognizes that the incoming call arrives from the public network 107. Incoming information (line number) is received with a known procedure, which is previously decided between the public network 107 and the private branch exchange 100. A pertinent extension terminal 106 is call-connection-controlled by analyzing incoming information in a central control unit 102. When same incoming information are received from the plural lines, the incoming call of the line when the line exceeds the number of lines that, can simultaneously connect the call, is limited.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a line for notifying incoming information such as a called number when a call is received from a public network to a private branch exchange (for example, a dial-in line for notifying the called number).
For the incoming connection method.

[0002]

2. Description of the Related Art In a private branch exchange accommodating a plurality of extension terminals such as a line and a telephone for notifying incoming information such as a called number at the time of an incoming call, the incoming call information is notified based on the incoming information from the line notified at the time of an incoming call. Is determined, and a call connection is made.

For example, in the case of a dial-in line, the lower 1 to 4 digits of the line number given by the central office are notified to the private branch exchange, and the private exchange which has received this is connected to the extension terminal corresponding to the received number. Call connection control.

In the case of a dial-in line, it is possible to assign more line numbers than the number of lines. Line number 1 uses the same line, such as extension terminal 1 and extension number 2 uses extension terminal 2. A line number is assigned to each extension terminal or a group of extension terminals of a specific department by configuring an extension representative to operate.

[0005]

However, in the above-described conventional incoming call connection system, since a representative on the line side is constituted, it is possible to receive an incoming call with the same line number for a plurality of lines. A line is occupied by incoming calls to the same extension terminal or a group of extension terminals (department), and the number of lines that can be connected to a call cannot be limited.

SUMMARY OF THE INVENTION The present invention solves the above-described problems. In a private branch exchange accommodating a plurality of extension terminals such as telephone lines and a line for notifying incoming information such as a called number when receiving an incoming call, the incoming call information is notified. It is an object of the present invention to provide an incoming call connection method capable of limiting the number of lines that can be connected even if the same incoming information is simultaneously received from a plurality of lines when receiving a line.

[0007]

SUMMARY OF THE INVENTION In order to solve the above-mentioned problems, the present invention provides a private branch exchange accommodating a plurality of lines such as a dial-in line and a plurality of extension terminals such as telephones for notifying incoming information such as a called number when receiving a call. An incoming call connection method in which the private branch exchange makes a call connection to the extension terminal based on incoming information notified when the line arrives, wherein the private branch exchange has a number of lines that can be simultaneously connected for each of the incoming information. And second means for restricting incoming calls on lines that can be simultaneously connected when the private branch exchange receives the same incoming information from the plurality of lines and the number exceeds the set number of lines. It is characterized by having.

According to a second aspect of the present invention, in the private branch exchange, a line number given to a line such as the dial-in line and a destination to which the private branch exchange is connected when there is an incoming call corresponding to the line number Extension terminal number, number of simultaneously connectable calls (number of lines) that can be simultaneously connected for each piece of incoming information when incoming information corresponding to the line number is received, and current number of call connections corresponding to the line number Is stored as a block, the second means searches the storage means for a line number corresponding to the incoming call information from the incoming call information received at the time of the incoming call, and stores the line number corresponding to the corresponding line number. The number of simultaneously connectable calls and the current number of call connections are compared, and when the number of currently connected calls is less than the number of simultaneously connectable calls, the number of currently connected calls is updated and a call is received from the destination extension terminal number. Extension end Extracted and was call connection to the internal line terminal, if the current connection number of calls exceeds the number of simultaneously-connectable calls characterized by regulating the processes busy and determines that it can not call incoming.

Therefore, according to the present invention, when an incoming call is received on a line for notifying incoming information, the second means sets the number of lines (the number of simultaneously connectable calls) set when the same incoming information is received from a plurality of lines. In this case, the number of lines that can be connected even if the same incoming information is simultaneously received from a plurality of lines can be limited.

[0010]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS Embodiments of the present invention will be described below with reference to FIGS. FIG. 1 is a block diagram showing an embodiment of a private branch exchange to which the terminating connection system of the present invention is applied, and FIG. 2 determines an extension terminal of a destination from incoming information such as a called number in the embodiment of the present invention. FIG. 3 is a flowchart showing a processing procedure at the time of an incoming call according to the embodiment of the present invention.

In FIG. 1, a private branch exchange 100 includes a communication path switch 101 for forming a communication path between various extension terminals such as telephones and a dedicated line or a public network, and a communication path switch 101.
And a central control unit (CPE) 102 connected to the central control unit 102 via a bus 109 and connected to the central control unit 102 via a bus 109. A storage device (MEM) 103 for storing various programs, office data, various tables, incoming information control data, and the like, and a plurality of office line trunks connected to the communication path switch 101 and performing interface control for connection to the public network 107 (COT) 104 and a plurality of extension terminal controllers (line circuits: LIN) 105 connected to the communication line switch 101 and controlling extension terminals. Each of the extension terminal controllers 105 includes an extension terminal 106 such as a telephone. Is connected. In addition, a station subscriber telephone 108 is connected to the public network 107.

[0012] The central control unit 102 and the incoming call connection program are provided with a first means and a second means.
The means are configured.

In the private branch exchange constructed as described above, the office subscriber telephone 108 dials a line number determined in the public network 107 corresponding to the office trunk 104, and an incoming signal is sent to the office trunk 104. Arrived,
Accordingly, the private branch exchange 100 recognizes that there is an incoming call from the public network 107. Here, in the case of a dial-in line, incoming call information (line number) is received between the public network 107 and the private branch exchange 100 according to a known procedure predetermined. Further, the incoming call information is analyzed by the central control unit 102 in accordance with the incoming call information control data and the incoming call connection program to control the call connection to the corresponding extension terminal 106, and the station subscriber telephone 108 and the extension terminal 106 in the private branch exchange 100 are controlled.
Enable calls between users.

According to the incoming call information control data and the incoming call connection program, when the same incoming call information is received from a plurality of lines, incoming calls on the lines when the number of lines that can be simultaneously connected is exceeded are regulated.

Next, according to FIG.
0 will be described. This incoming information control data 20
0, as shown in FIG. 2, the incoming call information (line number) 201 given to the dial-in line and the incoming call extension connected to the incoming call information corresponding to the incoming call information (line number) 201 The terminal number 202, the number of simultaneously connectable calls (number of lines) 203 that can be simultaneously connected for each piece of incoming information when incoming information corresponding to the incoming information (line number) 201 is received, and the incoming information (line number) ) 201 corresponding to the current number of call connections 204.

The incoming call information control data 200 is
Incoming call information (line number) 201, destination extension terminal number 20
2. The number of simultaneously connectable calls 203 and the number of call connections 204 are 1
The block is composed of a plurality of blocks, which can be freely rewritten according to operating conditions, and can determine conditions such as a destination extension terminal number 202 to be connected for each incoming information (line number).

The operation of the incoming call connection system according to the present embodiment will be described below with reference to FIGS.

The station-set telephone 108 is connected to the station trunk 104.
When an incoming signal arrives at the office trunk 104 by dialing a line number determined within the public network 107 corresponding to the public network 107, the private branch exchange 100 recognizes that there is an incoming call from the public network 107. Thereafter, in the case of a dial-in line, incoming information (line number) is received according to a procedure determined between the public network 107 and the private branch exchange 100. When the private branch exchange 100 receives the incoming call information (line number) due to an incoming call from the public network 107, the central controller 102 makes the incoming call information (line number) in the incoming call information control data 200 based on the received incoming call information (line number). ) 201 is searched, and the number of simultaneously connectable calls of the matched (corresponding) block is 20
3 is extracted (step 300). Thereafter, the current number of connected calls 204 of the matched (corresponding) block is extracted (step 301).

Next, the extracted number of simultaneously connectable calls 2
03 is compared with the current number of connected calls 204 to determine whether or not call connection is possible (step 302). If the call connection is possible, the current number of connected calls 204 is updated (step 303), and the extension terminal 106 to be called (received) is extracted from the destination extension terminal number 202 of the reception information control data 200 (step 303). 304). And this extension terminal 10
6 is processed by ringing transmission or the like, and the destination extension terminal number 20 corresponding to the incoming call information (line number) 201
The call connection control is performed for the second extension terminal 106 (step 305), and the call connection processing ends.

In step 302, if the current number of connected calls 204 exceeds the number of simultaneously connectable calls 203, it is determined that connection is not possible and the call cannot be received, and the public network 107 is not connected.
A busy process such as transmitting a busy tone to the station subscribed telephone 108 connected to the terminal is executed (step 306), and the call connection process ends. In addition, the current number of connected calls 204 is decremented at the end of the call to prepare for the next incoming call.

According to the above-described embodiment, the incoming call information (line number) 201 corresponding to the incoming call information is searched from the incoming call information control data 200 based on the incoming call information received at the time of the incoming call. The number 203 of simultaneously connectable calls corresponding to (line number) 201 and the number of currently connected calls 20
And if the current connection call number 204 is equal to or less than the simultaneously connectable call number 203 and the call connection is possible, the current connection call number 20
4 is updated, and the extension terminal 106 that receives the call is extracted from the destination extension terminal number 202.
If the current number of connected calls 204 exceeds the number of simultaneously connectable calls (number of lines) 203, it is determined that the call cannot be received, and the busy network is processed for the public network to regulate line incoming. Therefore, even if the same incoming information is received simultaneously from a plurality of lines, the number of lines that can be connected can be freely limited, and all lines can be used for incoming calls to the same extension terminal or extension terminal group (department). Occupation can be prevented.

[0022]

As described above, according to the present invention, when an incoming call is received on a line for notifying incoming information, the incoming call is restricted when the number of simultaneously connectable calls (the number of lines) is exceeded. Even if the same incoming information is received at the same time, it is possible to limit the number of lines that can be connected.

[Brief description of the drawings]

FIG. 1 is a configuration diagram showing an embodiment of a private branch exchange to which a termination connection system of the present invention is applied.

FIG. 2 is a configuration diagram of incoming information control data for determining an extension terminal of a destination from incoming information such as an incoming number in the embodiment of the present invention.

FIG. 3 is a flowchart showing a processing procedure at the time of an incoming call according to the embodiment of the present invention.

[Explanation of symbols]

 REFERENCE SIGNS LIST 100 Private branch exchange 101 Call path switch 102 Central control device 103 Storage device (storage means) 104 Central office trunk 105 Extension terminal control device (line circuit) 106 Extension terminal 107 Public network 108 Station subscribed telephone 109 Bus 200 Incoming information control data 201 Incoming call Information (line number) 202 Destination extension terminal number 203 Number of simultaneous connectable calls (number of lines) 204 Current number of call connections

 ────────────────────────────────────────────────── ─── Continuing on the front page (72) Inventor Ayako Matsuzaki 94, Kojiyama-shi, Fukushima, Fukushima Prefecture F-term (reference) 5K024 AA65 DD02 9A001 BB04 CC07 DD10 JJ12 KK56

Claims (2)

[Claims] 1. A private branch exchange accommodating a plurality of extension terminals such as telephones and a line such as a dial-in line for notifying incoming information such as a called number when an incoming call is received, and the private branch exchange is notified when the line arrives. An incoming call connection system for making a call connection to the extension terminal based on incoming information, wherein the private branch exchange sets a number of lines that can be simultaneously connected for each of the incoming information, and the private branch exchange comprises a plurality of lines. And a second means for restricting incoming calls of lines that can be simultaneously connected when the same number of lines is exceeded when the same incoming information is received from the line. 2. The private branch exchange includes: a line number given to a line such as the dial-in line; a destination extension terminal number to be connected to when a call information corresponding to the line number is received; When the incoming call information corresponding to the number is received, the number of simultaneously connectable calls (the number of lines) that can be simultaneously connected for each incoming call information and the current number of call connections corresponding to the line number are stored as a plurality of blocks. Storage means, wherein the second means searches the storage means for a line number corresponding to the incoming information from the incoming information received at the time of the incoming call, and determines the number of simultaneously connectable calls corresponding to the corresponding line number; Compare the current number of call connections and, if the current number of connected calls is equal to or less than the number of simultaneously connectable calls, update the current number of connected calls and extract the incoming extension terminal from the destination extension terminal number to extract the For extension terminals 2. The incoming call connection system according to claim 1, wherein a call connection is made, and if the current number of connected calls exceeds the number of simultaneously connectable calls, it is determined that an incoming call cannot be made, and busy processing is performed to restrict incoming calls.