JP2862601B2 - Private branch exchange system - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION [Purpose of the Invention] (Industrial application field) This invention relates to a private branch exchange system which is connected to an ISDN network and displays a call charge on a terminal in the system.

(Prior art) A service that uses an ISDN (Integrated Service Digital Network) network.
There is a service sent from the DN network. The private branch exchange system that has received this information displays the call fee information on the terminal in the system that was performing the call. However, if the call charge information is not sent from the ISDN network for some reason, or if the call charge information is sent but is not received, the call charge will not be displayed even if it is charged. Was.

(Problems to be Solved by the Invention) As described above, in the conventional private branch exchange system, the IS
If the call charge information was not sent to the party to be charged from the DN network, or if the call charge information was not received correctly, the call charge could not be displayed on the terminal in the private branch exchange system.

The present invention has been made in view of this problem, and has as its object to provide a private branch exchange system that displays a call charge on a terminal in the system even when call charge information cannot be obtained from an ISDN network.

[Means for Solving the Problems] To achieve the above object, the present invention provides a communication system which is connected to a network for transmitting communication charge information at the end of communication and which is transmitted from the network at the end of communication. In a private branch exchange system having a communication charge detecting means for detecting a communication charge of the communication from the information, a communication charge calculating means for calculating a communication charge based on a called number and a communication time of communication based on the call. ,
Display control means for displaying the communication charge calculated by the communication charge calculation means on the display means instead of the communication charge detected by the communication charge detection means, when the communication charge detection means fails to detect the communication charge. It is characterized by having.

(Operation) In the private branch exchange system of the present invention, the calling party number and the calling number are set apart from the communication charge detecting means for detecting the communication charge of the communication from the communication charge information transmitted from the network at the end of the communication. Communication fee calculation means for calculating the communication fee based on the communication time of the communication based on the communication fee, if the detection of the communication fee by the communication fee detection means fails, the display control means calculates It is displayed on the display means of the terminal in the system instead of the communication charge detected by the communication charge detecting means.

According to such a configuration, even when the communication fee detection unit that detects the communication fee of the communication from the communication fee information transmitted from the network at the end of the communication fails to detect the communication fee,
The communication fee can be displayed on the display means of the terminal in the system, and user operability can be improved in system operation.

(Example) Hereinafter, an example of the present invention will be described in detail with reference to the accompanying drawings.

FIG. 1 is a diagram showing a schematic configuration of the present invention.
Will send call charge information at the end of the call. This call charge information is detected by the detection means 2 and transmitted to the call control means 3. A memory 4 is connected to the detecting means 2, and the memory 4 stores the call charge information sent from the ISDN 1. A call charge calculating means 5 is connected to the call control means 3, and the call charge calculating means 5 calculates a call charge from the telephone number and the call time of the other party obtained through the call control means 3. . Call charge means 5
Is connected to a memory 6, and the calculated call charge information is stored in the memory 6. The selection means 8 selects one of the call charge information stored in the memory 4 and the memory 6 and transmits it to the display means 7, and the display means 7 displays the selected call charge information on the display unit of the terminal 9.

FIG. 2 is a block diagram showing one embodiment of the private branch exchange system of the present invention. In FIG. 2, extension telephones T1 to Tn are connected to line circuits L1 to Ln. Central office trunk circuit 22
Is connected to the ISDN network 23 and detects call charge information sent from the ISDN network 23 at the end of the call. The communication path network 21 is controlled by the central processing unit 25 and forms a communication path between the line circuits L1 to Ln or between the line circuits L1 to Ln and the local trunk circuit 22 corresponding to the ISDN network 23. Call management department
24 calculates a call charge based on the telephone number of the called party and the talk time dialed when the extension telephones T1 to Tn make a call through the ISDN network at the end of the call, and the calculation result is sent through the central processing unit 25. And stored in the storage unit 26. The central processing unit 25 operates on a bus in accordance with the program and data in the storage unit 26.
Each part is controlled via B1 to B4.

In FIG. 1, the terminal 9 corresponds to the extension telephone shown in FIG. 2, the detecting means 2 corresponds to the central office trunk circuit 22, the central processing unit 25, and the call charge calculating means 5 corresponds to the call managing section.
24, the call control means 3 corresponds to a line circuit, a communication network 21, a trunk circuit 22, a central processing unit 25,
The selection means 8 and the display means 7 correspond to the central processing unit 25. It is assumed that the memory 4 and the memory 6 are formed in the storage unit 26.

Based on the above configuration, FIG. 3 shows how a call charge is displayed when a call end operation is performed during a call.
This will be described with reference to the signal sequence diagram of FIG. 4, the flowcharts of FIGS. 5 to 8, and FIG. Now, it is assumed that the extension telephone T1 is making a call with the ISDN network 23 via the call network 21. Here, when the extension telephone T1 performs a call termination operation, the central processing unit 2 via the line circuit L1 and the bus B1.
A signal to that effect is sent to 5. Upon receiving this signal, the central processing unit 25 sends a disconnection message to the ISDN network 23 via the bus B1 and the local trunk circuit 22, as shown in FIG. On the other hand, the central processing unit 25 receives the release message from the ISDN network 23 and transmits a release completion message to the ISDN network 23. When the central processing unit 25 receives the release message, as shown in FIG. 5, the central processing unit 25 checks whether or not the release message includes call rate information (step 501). (Step 502), and store it in the memory 4 of the storage unit 26 via the bus B3 (Step 503).
Further, a signal indicating this by the end call operation in the extension telephone T1 is transmitted to the line circuit L1, the bus B1, the central processing unit 25,
It is sent to the call management unit 24 via the bus B4. As a result, the call manager 24 knows the end of the call, and calculates the call charge from the dial number and the call time of the called telephone on the ISDN network 23 that has called from the extension telephone T1. Then, as shown in FIG. 7, the calculated call fee information is sent to the central processing unit 25 via the bus B4 (step 701). Upon receiving the call charge information, the central processing unit 25 stores the call charge information in the storage unit 26.
(Step 702). Then, the central processing unit 25 performs the operation of displaying the call charge information on the extension telephone according to the flowchart of FIG. First,
If there is call charge information in the memory 4 of the storage unit 26, the call charge information in the memory 4, that is, the call charge information from the ISDN network 23 is displayed on the display unit (not shown) of the extension telephone T1 (step).
802). If the determination in step 802 is negative, it is checked whether there is call charge information in the memory 6 (step 803), and the call charge information in the memory 6, that is, the call charge information from the call management unit 24 is displayed on the extension telephone T1. (Step 804). If there is no call charge information in either the memory 4 or the memory 6, no display is performed (step 805).

Next, a case where a call termination operation is performed from the ISDN network 23 during a call will be described with reference to FIGS. 4 and 6. FIG. That is,
When the central processing unit 25 receives the disconnection message from the ISDN network 3 via the local trunk circuit 22, the central processing unit 25 sends a release message to the ISDN network 23 via the local trunk circuit 22. The ISDN network 23 receiving this release message sends a release completion message to the central processing unit 25. Also,
When a disconnection message is received from the ISDN network 23,
As shown in the figure, the central processing unit 25 checks whether or not there is call charge information in the received disconnection message (step 60).
1) If there is, call information is taken out (step 602),
The data is stored in the memory 4 of the storage unit 26 via the bus B3 (step 603).

At the end of the call, the central processing unit 25 receives the call charge information calculated by the call management unit 24 from the call management unit 24 as shown in FIG.
1) The data is stored in the memory 6 of the storage unit 26 (step 701).

Then, the processing shown in FIG. 8 is performed in the same manner as described above. If the call charge information is stored in at least one of the memory 4 and the memory 6, the call charge information is stored in the extension telephone T1.
Is stored in the display unit.

In this embodiment, the call charge information from the ISDN network 23 is prioritized since the presence / absence check of the call charge information in the memory 4 is performed first, but the call charge information in the memory 6 is displayed with priority. You may do so. If there is call charge information in both the memory 4 and the memory 6, the call charge information to be displayed may be selected, for example, depending on the value of the call charge.

Further, in this embodiment, the terminal in the private branch exchange system is a telephone. However, the present invention is not limited to this, and another terminal such as a facsimile apparatus may be used.

[Effects of the Invention] As described above, according to the private branch exchange system of the present invention, at the end of a call, the call management unit also calculates the call fee, and the calculated call fee information is stored in the storage unit. Therefore, even if the call charge information cannot be obtained from the ISDN network, the call charge information obtained from the calculation stored in the storage unit can be displayed on the display unit of the terminal in the private branch exchange system.

[Brief description of the drawings]

FIG. 1 is a schematic configuration diagram of a private branch exchange system of the present invention.
Fig. 3 is a block diagram of a private branch exchange system according to an embodiment of the present invention. Figs. 3, 4 are signal sequence diagrams according to an embodiment of the present invention, Figs. 5, 6, 7, 8 and 8. FIG. 4 is a flowchart according to one embodiment of the present invention. 2 ... Detection means, 3 ... Call control means, 4,6 ... Memory,
5: Call charge calculation means, 7: Display means, 8: Selection means, 9: Terminal, 21: Call path network, 22 ...
Office trunk circuit, 23 ... ISDN network, 24 ... Call management unit,
25 central processing unit, 26 storage unit.

Claims (1)

(57) [Claims] 1. A private branch exchange system connected to a network for transmitting communication charge information at the end of communication and having communication charge detection means for detecting a communication charge of the communication from communication charge information transmitted from the network at the end of communication. A communication charge calculating means for calculating a communication charge based on the called number of the called party and a communication time of the communication based on the call; and a communication charge if the communication charge detection by the communication charge detection means fails. And a display control means for displaying the communication charge calculated by the calculation means on the display means instead of the communication charge detected by the communication charge detection means.