JPS6130860A - Control system of charging pulse transmission - Google Patents

Abstract

PURPOSE:To decrease the processing time of a central controller by providing a control means to transmit a charging pulse to subscriber's equipment into a subscriber circuit intalled corresponding to each subscriber line in a telephone exchange. CONSTITUTION:The subscriber circuit 11 installed in correspondence to each subscriber line 5 has a talking current supply circuit 2 or the like. A central controller 4 decides the charging pulse period based on a connection destination of a call from the subscriber's equipment detected by a loop supevisory circuit 3 and transmits it to a charging pulse period generating circuit 10. Since the circuit 10 drives a normal/reverse polarity switching circuit 1 and the circuit 3 via a changing pulse waveform control timing generating circuit 8 at each pulse period, the call number is stored in a charging call storage memory 9 together with a changing pulse transmitted to the subscriber's equipment. Then the central controller 4 does not require timing generation processing, the processing time is reduced.

Description

DETAILED DESCRIPTION OF THE INVENTION [Technical Field of the Invention] The present invention relates to a billing pulse sending control system for sending billing pulses to in-home devices.

[Prior art]

FIG. 1 is a block diagram showing a conventional billing pulse sending control system. In the figure, 1 is a normal lever polarity switching circuit, 2 is a power supply 25 (e.g. -48V), and a resistor 2b.
and 2c, 3 is a loop monitoring circuit, 4 is a central control unit, 5 is a subscriber line, 6 is an in-home device, 7 is the normal lever polarity switching circuit 12, a speech current supply circuit 2 and a loop. It consists of a monitoring circuit 3,
This is a subscriber circuit connected to the in-home device 6 via the subscriber line 5.

Next, the operation of the billing pulse control system with the above configuration will be explained. First, the central control device 4 determines the charging pulse period according to the connection destination of the call generated from the home device 6, and then, for each determined charging pulse period, the charging pulse waveform is set as shown in FIG. Normal polarity, reverse polarity on/off commands and scanning commands for control are sent to the subscriber circuit I at predetermined timing, and billing pulses are sent from the subscriber circuit 7 to the home device 6. That is, the central controller 4 sends a normal polarity OFF command P1 at time 1+, a reverse polarity ON command P2 at time t2, and a scan command P3 at time t1 to the subscriber circuit T. Then, the subscriber circuit T transfers the scanning result P4 to the central control unit 4 at time t4.
Send to. Next, the central controller 4 sends a reverse polarity OFF command P5 at time t5 and a normal polarity ON command P6 at time t6 to the subscriber circuit 7, respectively. As an example, normal polarity is A gland -48V, B line ground, reverse polarity is A line ground, B line -48V.

In addition, FIG. 2 (Xu) is a billing pulse waveform diagram, and FIG. 2(b) is an explanatory diagram of operation timing.

However, in the conventional billing pulse sending control method, the central control unit controls billing pulse sending to a large number of subscriber circuits, which consumes a lot of processing time. Normally, the command and scanning control lines are connected to a bus, and the path is occupied by a group of commands for charge pulse sending control for a large amount of time. This has resulted in drawbacks such as a limitation on the number of subscriber circuits that can be processed by the central control unit.

[Summary of the invention]

SUMMARY OF THE INVENTION Therefore, an object of the present invention is to provide a billing pulse transmission control system that can reduce the processing time in a central control unit and increase the number of subscriber circuits.

In order to achieve such an object, the present invention includes a subscriber circuit installed for each subscriber line in a telephone exchange.
This system is provided with a control function means for sending billing pulses to in-home devices, and will be described in detail below using examples.

〔Example〕

FIG. 3 is a block diagram showing an embodiment of the billing pulse sending control system according to the present invention. In the figure, 8 is a billing pulse waveform control timing generation circuit, 9 is a billing frequency storage memory, 10 is a billing pulse cycle generation circuit, 11 is the normal/reverse polarity switching circuit 12, and the call current supply circuit 2.
．． Loop monitoring circuit 31 Billing pulse waveform control timing generation circuit 8, Billing frequency storage memory 9. and a billing pulse cycle generation circuit 10.

Next, the operation of the billing pulse sending control system with the above configuration will be explained. First, the call connection light generated from the home device 6 detects dial information from the home device 6 by the loop monitoring circuit 3, and is notified to the central control device 4 as scanning information. Therefore, the central control device 4 analyzes this travel information to determine the billing pulse period, and sends this billing pulse period information to the billing pulse period generating circuit 10 as a command. This billing pulse cycle generation circuit 1
0 is also used as information on this billing pulse cycle, and drives the billing pulse waveform control timing generation circuit 8 at every predetermined timing cycle. Therefore, as shown in FIG. 2, this billing pulse waveform control timing generation circuit 8 generates billing pulses by driving the normal/reverse polarity switching circuit 1° loop monitoring circuit 3 according to predetermined timings t1 to t6. from the subscriber circuit 11 to the inside of the house via the subscriber line 5! , 6. [Effects of the Invention] As explained in detail above, according to the billing pulse sending control method according to the present invention, the processing of each document in the central processing unit, that is, the billing pulse period can be controlled. Counting process 1 Counting the timing for billing pulse waveform control Processing 1 Sending out a command for normal/reverse polarity switching for billing pulse waveform control Process 1 Based on the loop monitoring information for each billing pulse Since there is no need to perform processing to store the billing frequency for each device, the processing time of the central control device can be greatly reduced, and the number of subscriber circuits can be greatly increased. Ru.

[Brief explanation of the drawing]

FIG. 1 is a block diagram showing a conventional charging pulse sending control system, FIG. 2 is a diagram showing the timing of charging pulse waveform control, and FIG. 3 is an embodiment of the charging bus sending control method according to the present invention. FIG. i ass/normal/reversing polarity switching circuit, 2 arguments ◆/call t@ supply circuit, 2a...ia source, 2b and 2e*114/resistance, 3 fists/ll11 loop monitoring circuit, 4... ...Central control unit, 5...Participating entrant line,
6φ...Home equipment, 7...-Subscriber circuit, 8...Membership/charging pulse waveform control timing generation circuit, 9...
Charging frequency storage memory, 10O...Charging pulse cycle generation circuit, 11...-Subscriber circuit.

Claims (1)

[Claims] 1. A billing pulse sending control system, characterized in that a control function means for sending billing pulses to in-home equipment is provided in a subscriber circuit installed for each subscriber line in a telephone exchange.