JPS5937909B2 - Billing pulse sending method - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a billing pulse sending system to public telephones in an electronic exchange.

In the conventional billing pulse sending system, substantially the same billing pulse is sent to the public telephone regardless of whether the call is answered or a call is in progress.

For this reason, when making a short call from a public telephone in a car or within a short distance, the caller usually inserts a 10 yen coin, but in this case, a toll reminder sounds as soon as the called party answers. It will be sent to the person. On the other hand, since the called party identifies himself/herself at the same time as answering, the caller cannot hear the called person's name due to the toll reminder tone, and the caller cannot confirm who the called party is again. There was a problem that I had to confirm whether this was the case. It is an object of the present invention to provide a billing pulse sending system that eliminates the drawbacks of the conventional system.

That is, the caller from the public telephone is aware of this fact when only one coin has been inserted, and there is no need to send out a toll reminder sound in such a case.

The present invention suppresses the toll reminder sound to the caller when only one coin is inserted. Hereinafter, the present invention will be explained in detail with reference to the drawings. FIG. 1 is a relay system diagram showing one embodiment of the present invention using a storage program controlled electronic exchange, and shows the case of long-distance connection. In the figure, the location is a public telephone, SWF is a switch frame, and QGT-C
H is a public outgoing trunk that has the function of sending charging pulses to the public. Further, M is a memory that stores program data defining the procedure for performing the exchange operation, cc is a central control unit that controls the sequential execution of the programs stored in M,
SD is a signal distribution device having a function of operating and restoring relays in OGT-CH, and SC is a switch driving device that drives switches in SWF. The following describes the case where a long-distance connection is made from a public telephone. When the caller dials after inserting a coin from a public telephone, the telephone calls the public outgoing trunk O via the switch frame SWF.
It is connected to the GT-CH and further connected to the called subscriber of another station via several switching layers. When the called party answers, the first charging pulse is sent from the OGT-CH via the SWF to the public telephone. This billing pulse is sent to the public telephone equipment via the SWF. This billing pulse is created by a signal from the signal distribution device SD, and once the communication current is cut off, the current direction is changed, and after a certain period of time (injected coins are stored during this period), the current direction is changed again at 0GT-CH. the same current as before the called party answered. During the call, billing pulses are sent out from 0GT-CH at regular intervals based on the distance-based time difference method, and coins are sequentially stored. FIG. 2 shows a circuit diagram of a known public telephone.

In the figure, HS1 to HS3 are the contact points of the switch,
KSl to KS4 are lock contacts for talking without inserting coins; Di, DSl to DS2 are dial impulse contacts and off-normal contacts; F is a relay for identifying local calls and long distance calls; Controls the sending of reminder sounds. Note that relay F is no longer necessary after the introduction of the wide-area time and minute system, as it also sends out reminder tones for local calls. M is a relay for monitoring the response of the called party, which operates once the called party answers, mechanically maintains its operation, and recovers when the handset goes off-hook. P is a polarized relay for storing coins, which operates when the L2 wire is ten-polar. CCLl and CCL2 are contacts that operate when the first coin is inserted, are held mechanically, and are restored by on-hook, CCl is a contact that operates when one coin is at the bottom of the accumulation track, and CC2 is one coin above the bottom. A contact operated by a coin (second coin), CC
Both contacts 1 and CC2 will be restored if the coins run out.
CT is a contact that operates while the transceiver is off-hook and recovers in the event of a coin jam. TG is a signal oscillator for inserting additional coins, and a current flows for the duration of the charging pulse when storing the last accumulated coin, oscillates, and sends a signal tone (called a reminder tone) to the receiver R. . FIG. 3 is a diagram showing the charging pulse sending unit in the public outgoing trunk 0GT-CH, where P and Q are charging pulse sending relays that send out charging pulses in response to signals from the signal distribution device SD, and A is a call originating relay. This is a side monitoring relay.

Further, conventional circuit operation diagrams in FIGS. 2 and 3 are shown in FIGS. 4 and 5, respectively. First, a conventional billing pulse sending system will be explained using FIGS. 1 to 5. In Fig. 2, when the caller takes off the handset from the public telephone (Fig. 4 A), the switch contact HS
1 to HS3 operate.

Next, when a coin is inserted (portion in Figure 4), contacts CCLl,C
CL2 operates, and relay F operates through the next loop. Further, the dial impulse is sent out in the next circuit by connecting and disconnecting the contact Di.

When the connection is completed after sending the dial impulse and the called party answers (FIGS. 4 and 5 C), relay Q in the public outgoing trunk 0GT-CH in FIG. 3 is activated.

Due to the operation of relay Q, the line is disconnected, the communication current to the public telephone is stopped, and as a result, relay F in FIG. 2 begins to recover. The communication current disconnection time at this time is set to about 500 ms, as shown in FIG. 5, in order to allow the relay F, which has a slow-slow recovery characteristic, to sufficiently complete recovery. After that, relay P in 0GT-CH (Fig. 3)
operates, and the communication current is reversed (FIGS. 4 and 5 D). As a result, the relay M in the public telephone shown in FIG. 2 operates in the following circuit. The operation of relay M increases the communication current, and in the next circuit, relay P is operated to store coins. ≦-1ν The first coin is stored by the operation of the relay P, and the contact CCl is restored, but the contact p of the relay P inserted in parallel is operated and the operating circuit of the relay P is maintained.

At this time, if the caller has inserted only one coin, contact CC2. is inactive, so the signal tone oscillator TG
A current flows through the TG, causing the TG to oscillate, and a reminder tone is sent to the caller via the receiver R (FIG. 4).

On the other hand, if two or more coins are inserted, contact C
Since the signal tone oscillator TG is short-circuited during the operation of C2, it does not oscillate. Relay P in the building is public outgoing trunk 0G
The relay P in 0GT-CH in Figure 3 operates while the polarity reversal charge pulse (approximately 700ms) is sent from the TCH.
When the communication current is restored and the state of communication current interruption (FIG. 4 and FIG. 5 E) is resumed, recovery begins.

In the outgoing trunk 0GT-CH, after relay P is restored (approximately 10
0ms), and relay Q is restored (see Figures 4 and 5).
, the communication current returns to the same current direction as before the called party answered. Thereafter, relays P and Q in the 0GT-CH repeat operation and recovery periodically based on the distance-based time difference method, and send billing pulses to the public telephone. Note that the second and subsequent billing pulses differ from the first billing pulse in that they are interrupted for 100 ms, reversed for 700 ms, and interrupted for 100 ms, as shown in FIG. This charging pulse transmission is repeated until the last coin is stored. When storing the last coin, contact CC2 is inoperative in FIG.
A reminder sound is sent from G (Fig. 4, 1). Thereafter, when the call ends and the caller goes on-hook (Figure 4), each relay contact is restored. As explained above, in the conventional billing pulse sending system, if the caller using a public telephone inserts only one coin before the called party answers, the last coin is inserted as soon as the called party answers. will be stored, and a reminder tone will be sent to the caller at the same time.

For this reason, it is necessary to repeat the caller's name when answering the call, which is a major drawback in the service of using public telephones. In order to suppress such a reminder sound when the called party answers, the present invention uses a charging pulse (pole reversal pulse) when the called party answers, to suppress the signal tone oscillator T in the public telephone.
In order to prevent G from operating, the time until the polarity of the first billing pulse is reversed when the called party answers is shortened, and thereby the slow recovery relay F for local/long distance identification in the public telephone is restored. This is something I tried to suppress.

The billing pulse sending system according to the present invention will be explained below in FIGS. 2 and 3.
This will be explained with reference to FIGS. 6 and 7, which show circuit operation diagrams.

Further, a general flowchart of a program for realizing the present invention is shown in FIG. As shown in FIGS. 6 and 7, in one embodiment of the present invention, the first charging pulse sent from the charging outgoing trunk to the calling subscriber of the public telephone after the called party answers It was decided to use the charging pulses that had been sent out from the second time onwards, and the charging pulses that had been conventionally sent out the first time as the second charging pulses. That is, when the called party answers at point C in FIGS. 6 and 7, the central controller CC shown in FIG. 1 issues a charge pulse generation request to the memory M.
Then, the memory M takes out the processing index PT and branches based on this value. Since the initial values of the processing index PT are all 1, 0GT-C shown in FIG.
Sends an operation command for relay Q in H. Also, as shown in the time chart of Fig. 8, the data section of the time counter PTC is set to O (that is, the timing value is set to 100m).
s), the processing index PT is set to 2, and the cycle ends. Through this program processing, relay Q in the public outgoing trunk 0GT-CH operates, and the line to the public telephone equipment is disconnected. As a result, the relay F in Fig. 2
begins to recover. However, the disconnection time for this line is 100
ms, it is not possible to complete the recovery of the relay F having the slow-slow recovery characteristic during this time. And the next 10
After 0 ms (2 in Figures 6 and 7), since PT is 2, processing starts with PT = 2, and first the timer counter PT is
Data of C is retrieved. At this time, since PTC=0, a command is sent by the operation of relay P in 0GT=CH, and PTC is set to 2 and PT to 3, and this cycle ends.
When relay P in 0GT-CH operates, the communication current is reversed, and relays M and P in the device shown in Fig. 2 operate in the same circuit as described above for the conventional system, thereby Store coins.

At this time, if the caller using the public telephone has inserted only one coin, contact CC2 is inactive and current may flow to the signal tone oscillator TG, but according to the present invention, the relay Since F is not restored, TG is short-circuited by contact f of relay F. Therefore, the TG cannot oscillate, and a reminder tone to the caller is prevented. In the next cycle,
Program processing is performed in a routine with PT=3, but since PTC is initially 2, processing during timing is started and the timer is decremented until PTC=0. And P.T.
When C=O, check the inserted coin,
If there are no coins, a recovery command is sent to relays P and Q, and a busy tone is sent to the public telephone. On the other hand, if you have coins,
This cycle ends by setting PTC to 3 and PT to 5.
In the PT25 routine as well, the PTC is decremented, and when the timeout occurs, a recovery command is sent to the relay P, and the PTC is
Set T to 4 to end this cycle. When the relay P in the 0GT-CH is restored by this process (e in FIGS. 6 and 7), the communication current from the 0GT-CH to the station is cut off again. As a result, the internal relay P shown in FIG. 2 is restored. Then, after the next 100ms (6th
7), the process of PT24 begins. Here, a recovery command is sent to relay Q in 0GT-CH, PT is set to 6, and the time (Nms) until the next pulse occurs is calculated from the ground charging index, and the pulse number counter PCN is registered. . From the next cycle onwards, a timeout occurs in Nms, and at the time of timeout, the PCN is taken out and a check is made to see if it is the second billing pulse. If it is the second pulse, PT is set to 0, and the conventional first charging pulse (response pulse) is sent as the second pulse.
Take a timing of 0ms. As a result, 0GT-CH
Relay Q inside operates and cuts off the communication current to the station for 500ms. This 500 ms time allows the internal slow recovery relay F shown in FIG. 2 to fully recover. Therefore, if there is only one coin left in this time slot, when the call current is reversed in the next cycle, current flows through the signal tone oscillator TG, and a reminder tone is emitted to the caller. Sent out. Note that the third and subsequent billing pulses are generated in the same way as in the past, with billing pulses of 100 ms off, 700 ms inverted, and 100 ms off, and are sent out until the call ends or coins run out. As described above, according to the present invention, it is possible to prevent the sending of a reminder sound when the called party answers when only one coin is inserted, and when two coins are inserted.
If the number is more than one, a predetermined reminder sound can be sent out in the same way as in the past. As a result, due to the reminder tone, it was impossible to hear the callee's every response when the callee answered, and it was difficult to hear the callee's identity again. This eliminates the previous inconvenience and provides a major advantage when using public telephones.

[Brief explanation of the drawing]

Fig. 1 is a relay system diagram showing one embodiment of the present invention using a storage program controlled electronic exchange, Fig. 2 is a circuit diagram of a public telephone, and Fig. 3 shows a charging pulse sending unit in a public outgoing trunk. 4 and 5 are conventional circuit operation diagrams shown in FIGS. 2 and 3, respectively, and FIGS. 6 and 7 are circuit operation diagrams according to the present invention shown in FIGS. 2 and 3, respectively. FIG. 8 is a general flowchart of the program in the present invention. Location: Public telephone, 0GT-CH: Public outgoing trunk, S
WF: switch frame, CC: central control unit, M. Memo I). SC: switch drive device, SD: signal distribution device, TG: signal tone oscillator, F, P, Q: relay.

Claims (1)

[Claims] 1. In a telephone exchange that has the function of controlling the storage of coins and sending a charging pulse to a public telephone in order to make the caller hear a toll reminder sound when the last coin is stored, the time until the polarity of the charging pulse is reversed is determined. A control means is provided in the public telephone that is activated when a predetermined time has elapsed, and enables the transmission of a toll reminder tone when activated, and a control means is provided in the public telephone that activates when a predetermined time has elapsed. means for transmitting a first charging pulse whose time is set in a range in which the control means in the telephone does not operate, and transmitting a second charging pulse whose time is set in a range in which the control means is activated when the second charging pulse is transmitted; A billing pulse sending method characterized by providing: