JPH0220948A - Selecting system for optimum telephone network - Google Patents

Abstract

PURPOSE:To select an optimum telephone network by accumulating in advance dial information for showing one's own speech prediction time and selecting an optimum telephone network by the prediction speech time and a line wire number, and informing a fact that the end of the prediction time has approached, to a speaker in the course of speech to a processing part for outgoing to a trunk line. CONSTITUTION:A dial information analyzing circuit 8 analyzes in advance dial information for showing one's own speech prediction time before or after dialing a line wire number from an extension telephone set, and a central storage device 7 accumulates the dial information which has been analyzed. A central control circuit 6 selects an optimum telephone network by the speech prediction time and the line wire number and executes an outgoing to a trunk line, and a timepiece circuit 10 informs a fact that the speech prediction time has approached to a speaker by a prediction alarm tone in the course of speech. In such a way, an optimum speech network can be selected.

Description

DETAILED DESCRIPTION OF THE INVENTION (Field of Industrial Application) The present invention relates to an electronic automatic private branch exchange, and particularly to a method for selecting an optimal telephone network.

(Prior Art) Conventionally, in this type of selection method, the expected call time for a caller to an outside line of each private branch exchange is fixedly set in advance in a storage device inside the exchange. A known method is to select the optimal telephone network based on a fixed call time and an external line number that is called from an extension, and then make the call from the central office trunk.

(Problems to be Solved by the Invention) In the conventional optimum telephone network selection method described above, the expected call time is set from the beginning, so the call time and the time fixedly set in advance for each call are There is a drawback that the difference between the expected call time and the expected call time is likely to be large (and the selected telephone network may not be optimal).

An object of the present invention is to store dialing information representing the expected call time in advance, either before or after dialing an external number from an extension telephone, when an extension caller makes a call to a telephone network with a different call rate structure. The system selects the most suitable telephone network based on the expected call time and outside line number, makes a call to the central office line, and notifies the caller during the call that the expected call time is about to end. It is an object of the present invention to provide an optimal telephone network selection method configured to eliminate the above problems and select the telephone network optimally.

(Means for Solving the Problems) The optimal telephone network selection method according to the present invention is configured so that an extension caller can make a call to a telephone network with a different call rate structure in an electronic automatic private branch exchange. The system includes a dial information analysis circuit, a central storage device, a central control circuit, and a clock circuit.

The dial information analysis circuit is for analyzing dial information indicating the expected call time of the user, either before or after dialing an external number from the extension telephone.

The central storage is for storing analyzed dialing information.

The central control circuit selects the most suitable telephone network based on the expected call time and external line number and makes the call to the central office line.

The clock circuit is used to notify the caller during a call that the expected call time is approaching by means of a forecast tone.

(Example) Next, the present invention will be explained with reference to the drawings.

FIG. 1 is a block diagram of a relay device showing an embodiment of the optimum communication network selection method according to the present invention.

In Fig. 1, 1 is an extension telephone, 2 is an extension subscriber circuit, 3 is a main call switch, 4 is a central office trunk circuit, 5 is a central office line, 6 is a central control circuit, 7 is a central storage device, and 8 is a dial. An information analysis circuit, 9 a forecast sound source circuit, and 10 a clock circuit.

In addition, @3.
The table shows an example of contents stored inside the storage device according to the present invention.

In Fig. 1, when an extension caller makes a call to a central office line 5 with a different call rate structure, the extension caller uses an extension telephone L to enter the central office trunk acquisition number (for example, 10''), the expected call time (
For example, for 15 minutes, enter @15”) and the outside line number (
For example, dial 03-123-4567).

The dial information is applied to the dial information analysis circuit 8 through the extension subscriber circuit 2, and is counted and analyzed by the dial information analysis circuit 8. Next, the above-mentioned dial information is transferred to the central control circuit 6, and stored in the central storage 7 as the calling extension number, outside line number, and expected call time using the configuration shown in Table 1.
is accumulated in

The central control circuit 6 selects the optimum telephone network number based on these contents, and sends a dial pulse to the office line 5 through the office line trunk circuit 4 as described in the optimum telephone network number in Table 1. When the called party on the outside line answers, a response signal is detected by the central office trunk circuit 4, and the main call switch 3 allows the caller to communicate with the extension caller.

At this time, the central control circuit 6 drives the clock circuit 10 to monitor the call time, and calculates the difference from the expected call time (Table 1) stored in the central storage device 7. As a result, for example, when one minute has passed, the main call switch 3 is switched to the extension caller, and the caller hears the forecast sound from the forecast sound source 9 through the main call switch 3 and the extension subscriber circuit 2. ing.

In fact, by listening to the forecast tone, the extension caller will know that the difference between the expected call time and the actual call time is one minute, and will promptly end the call. As soon as the call is completed, the central control circuit 6 uses the restoration signal of the office line 5 detected on the office line trunk 4 to calculate the actual call time and call charges as shown in Table 1, and the process ends. do.

(Effects of the Invention) As explained above, when an extension caller makes a call to a telephone network with a different call rate structure, the caller can predict his or her own call in advance, either before or after dialing an external number from the extension telephone. It stores dialing information that indicates the time, selects the most suitable telephone network based on the expected call time and outside line number, and sends a notification to the caller during the call that the expected call time is nearing the end. By making a report, a more optimal telephone network can be selected, and the caller can hear the forecast sound from the forecast power source, which has the effect of making a call at a cheaper call rate.

Table 1

[Brief explanation of the drawing]

FIG. 1 is a block diagram of a relay device showing an embodiment of the optimum telephone network selection method according to the present invention. 1-・Extension telephone 2...Extension subscriber circuit 3...
Main call switch 4... Office line trunk circuit 5... Office line 6... Central control circuit 7-- Central storage device 8... Dial information analysis circuit 9... Forecast sound source circuit 10... Clock Circuit patent applicant Hisashi Inoro, patent attorney representing NEC Corporation

Claims (1)

[Claims] A dialing information analysis circuit for analyzing dialing information representing an expected call time before or after dialing an external number from an extension telephone; and storing the analyzed dialing information. a central storage device for selecting the most suitable telephone network based on the expected call time and the outside line number, and a central control circuit for making a call to the central office line; and a clock circuit for notifying the caller, and is configured so that a common-law caller can make a call to a telephone network with a different call rate system using an electronic automatic private branch exchange. Net selection method.