KR950014626B1 - Communication fee imposition method for pbx - Google Patents

Abstract

The method for laying extension call charge of a private branch exchanger comprises the steps of: storing a calling subscriber number and a called subscriber number at a common memory if the state of the called subscriber is idle and recording the charge laying time and call starting time an extension call table of the calling subscriber of the common memory if the called subscriber responds; determining if it is a calling subscriber restoring or a called subscriber restoring after completing the call, and if it is a calling subscriber restoring, generating a charge laying data via the information stored at the common memory and storing it at the common memory; and transmitting extension charge laying information to a call charge laying circuit.

Description

How to charge an internal call rate for private exchange

1 is a block diagram of a device for charging a conventional trunk line call.

2 is a block diagram of a device for inter-telephone billing according to the present invention.

Figure 3 is a flowchart for explaining the call information storage and response signal processing of the present invention.

Figure 4 is a flow chart for explaining the call recovery signal detection and charging information processing process of the present invention.

5 is a flowchart illustrating a process of transmitting an extension call charging information to a billing device of the present invention.

* Explanation of symbols for main parts of the drawings

3: switching circuit section 4: extension subscriber circuit section

5: central processing unit 7: memory

8: Time generating circuit part 10: Number and response recovery signal detection part

11: common memory 12: multiple frequency receiving circuit

13: Call charge circuit

The present invention relates to a method for allowing a charge for a call connected between stations in a private exchange, and in particular, to enable use as a group telephone and a small-capacity trunk line exchange using a private exchange.

In the conventional private exchange, as shown in FIG. 1, when the external subscriber of the outside Ext1 calls the external subscriber through the trunk line TRK1 and responds while the external subscriber is listening to the ringing tone, the external subscriber is answered. Charge charge signal is applied by private charge exchange signal detecting circuit (2) to give charge charge signal (50Hz, 12Hz, 16Hz) or polarity reversal, charge charge pulse, etc. so that charge can be charged from private exchange to accepted exchange. When detected and applied to the central processing unit (5) will be charged for the call.

Here, 1 is a trunk line circuit, 3 is a switching circuit, 4 is an internal subscriber circuit, 6 is a trunk call charging circuit, 7 is a memory, and 8 is a time generation circuit.

However, the conventional apparatus for charging a trunk line call is capable of charging a trunk line call when a call is made by an outside subscriber (Ext2) when a call is made between external subscribers (Ext1 and Ext2). There is a problem that the use of a large-capacity, expensive local exchange is required because it is impossible to charge for.

The present invention has been made in view of such a conventional problem, and an object of the present invention is to provide a method for charging a charge for inter-telephone calls in a private exchange.

In order to achieve this object, the present invention provides a switching circuit section 3, an extension subscriber circuit section 4, a central processing unit 5, and a memory 7, as shown in the block diagram of the inter-line call charge apparatus of FIG. And a time generation circuit section 8, a number and response recovery signal detection section 10, a common memory 11, a plurality of frequency reception circuit sections 12, and a call charge section circuit section 13.

The inter-line call charging method of the present invention by such a device includes a call information storage and response signal processing, a call recovery signal detection and charge information processing process, and a charge charging device as shown in FIGS. 3 to 5. It consists of sending an extension call charge information of erotic. In addition, the above call information storage and response signal processing process stores the called subscriber number and the called subscriber number in the common memory 11 when the called party is idle, and the called subscriber answers the call when the called subscriber answers. The process of recording the charge start and the call start time in the extension call table of the called subscriber of the memory 11 is performed. In addition, when the call recovery signal detection and billing information processing process is recovered after the call is terminated, it is determined whether the recovery of the called subscriber or the called subscriber is restored and the information stored in the common memory 11 is determined. Through the process of generating the charging data through the common memory 11 consists of. In addition, the extension call charging information transmission process to the charge charging device is characterized in that it consists of a process of transmitting the extension charge information to the call charging circuit unit (3).

Referring to the call charging method according to the present invention by performing such a process, when the subscriber (Ext1) calls the subscriber (Ext2) in FIG. 2, the subscriber (Ext1) is in a state of listening to the dial tone Dials the telephone number of the extension subscriber Ext2. At this time, if the telephone of the extension subscriber Ext2 is a dial pulse type telephone, the numbers dialed by the number and response recovery signal detection unit 10 are transmitted to the central processing unit 5 through the common memory 11, and if the telephone is a push button telephone, The dialed numbers are detected by the central processing unit 5. When the extension subscriber Ext1 dials all the telephone numbers of the extension subscriber Ext2, the central processing unit 5 detects whether or not the called subscriber state shown in FIG. 3 is idle. Detects whether is idle. At this time, if the extension subscriber Ext2 is not in the idle state, the central processing unit 5 transmits a busy tone to the extension subscriber Ext1.

If the subscriber Ext2 is idle, the telephone number of the subscriber Ext1 is recorded as the telephone number information called in the telephone extension information table of the memory 7, and the telephone number of the subscriber Ext2 is used as the telephone number called. do. In such a state, the central processing unit 5 sends a ringing tone to the extension subscriber Ext2 and a ringing tone to the extension subscriber Ext1. Then, when the extension subscriber Ext2 responds to the call of the extension subscriber Ext1, the response state is detected by the number and response recovery signal detection unit 10 through the extension subscriber circuit unit 4, and the response information is detected by the common memory 11. It records in and transmits the response of the subscriber (Ext2) to the central processing unit (5). Recognizing the response of the extension subscriber Ext2, the central processing unit 5 performs the charging time and the call start time recording process on the extension call table of the called subscriber of the common memory 11. After the call is completed between the subscribers Ext1 and Ext2, either the subscribers Ext1 or Ext2 will first on-hook. At this time, the number and response recovery signal detecting unit 10 detects the recovery state in the subscriber subscriber circuit unit 4 and transmits the recovery information to the central processing unit 5 through the common memory 11.

The central processing unit 5 that receives the recovery information through the common memory 11 determines whether the currently restored subscriber is the called subscriber or the called subscriber in the process of detecting whether the called subscriber is in the restored state. In case of the recovery state of the called subscriber by detecting the extension call start bit of the extension call information table, the recovery message is transmitted to the calling subscriber and the recovery message is received from the called subscriber in FIG.

When the restored subscriber is a calling subscriber or a recovery message is received from the called subscriber, the extension call information recorded in the common memory 11, i.e., the calling subscriber, is obtained in the process of obtaining call information recorded in the extension call table of FIG. After the number, the called subscriber number, and the call start time are obtained, the process of creating the data necessary for the extension call charging of FIG. 4 is performed.

At this time, call duration is calculated using recovery time and call start time.

When the data of the supplementary information is completed in the process of making the data necessary for the extension call charge of FIG. 4, the information for transmission to the call charge circuit unit 13 is stored in the extension charge data table of the common memory 11.

Next, as shown in FIG. 5, the process of transmitting the station charge information to the call charge circuit unit 13 will be described.

The extension call information transmission program of the central processing unit 5 is periodically performed by the time generation circuit unit 8 at a predetermined time to transmit the call information to the call charge circuit unit 13 through the process shown in FIG. do.

Thereafter, after detecting whether the call charge circuit unit 13 is in a normal state through an injection state and a state detection protocol, if the call state is normal, call information is written to the extension charge data table of the common memory 11 of FIG. Reads the extension call information stored in the common memory 11 through the storing process, reads the charging information of FIG. 5 and converts the charging information of FIG. 5 into ASCII data, and converts it into ASCII code. Let's do it.

When the conversion is completed, transmission of the extension call information is performed through the abbreviated process between the central processing unit 5 and the call charging circuit unit 13.

In FIG. 5, if it is detected whether another call information is stored in the common memory 11 through the extension billing information transmission process by the predetermined method between the central processing unit 5 and the charging unit 13. Is repeated from the process of reading the extension charge information stored in the common memory 11 of FIG.

As described above, according to the present invention, by enabling charges for calls between stations at private exchanges, the private exchanges can be widely used for group telephone systems and small trunk line exchanges.

Claims (1)

In the case of the called subscriber state, the called subscriber number and the called subscriber number are stored in the common memory 11, and when the called subscriber answers, the charge is made in the extension telephone table of the calling subscriber of the common memory 11. Call information storage and response signal processing that records charge start and call start time, and it is stored in common memory 11 if it is recovery of called subscriber by determining whether called subscriber recovery or called subscriber recovery at recovery after call termination. To the billing device which generates the billing data based on the received information and processes the call recovery signal detection and billing information processing in the common memory 11 and transmits the billing information to the call billing circuit unit 13. A method of charging an inter-exchange charge of a private exchange, comprising the process of transmitting information of an extension call charge.