JPH0315396B2 - - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a selective signal counting scheme in a telephone exchange.

Conventionally, when counting selection signals sent from subscriber end devices such as telephones housed in a telephone exchange and performing predetermined switching processing, for example, as shown in FIG. In a system comprising a push-button telephone 40 and a rotary dial telephone 50 connected via a line circuit 20, a register circuit 30 connected to the output side of the main channel network 10, and a central control circuit 60, the telephone 40, the central control circuit 60 detects this state transition via the line circuit 20, selects the register circuit 30a to receive the selection signal (multifrequency signal) from the telephone 40, and The network 10 is selectively connected and controlled to form a selection signal receiving path between the telephone 40 and the register circuit 30a. The selection signals counted and accumulated by the register circuit 30a are transferred to the central control circuit 60 and analyzed, after which a predetermined call connection process is performed. On the other hand, in the case of the rotary dial type telephone 50, the register circuit 30b for receiving the dial pulse signal is selected by the same process in the central control circuit 60 to perform the exchange process.

However, in such a conventional system, from the point of view of economic efficiency, register circuits 30a and 30b are arranged in a small number compared to the number of telephones 40 and 50. The transmission of the dial tone is delayed or is processed as a busy tone transmission. These are undesirable as they lead to poor service. Further, in order to count selection signals, empty selection is required depending on the type of register circuit, which inevitably increases the complexity and scale of the control program, leading to a decrease in the processing capacity of the central control circuit 60.

The purpose of the present invention is to solve these problems.

The selection signal counting method according to the present invention is provided with dial pulse signal counting means in each line circuit connected between the input side of the main channel network and the subscriber terminal equipment, and a multifrequency signal counting means. A register circuit having a register circuit is commonly accommodated on the output side of the main channel network for some of the subscriber terminal equipment, and if the selection signal sent from the subscriber terminal equipment is a dial pulse signal, the line The selection signal is counted by a circuit, and if the selection signal is a multi-frequency signal, the selection signal is counted by the register circuit.

Next, embodiments of the present invention will be described with reference to the drawings.

FIG. 2 is a block diagram showing an embodiment of the selection signal counting method according to the present invention. Referring to the figure, a push-button telephone 40 that uses a multi-frequency signal as a selection signal and a rotary dial telephone 50 that uses a dial pulse signal as the selection signal are housed on the input side of the main channel network 10 via a line circuit 200. has been done. Each line circuit 200 includes a telephone call circuit 210, a dial pulse detection circuit 220, a dial pulse counting circuit 230, a dial pulse numeric information storage circuit 240, and an interface circuit 250, and is connected to a line control circuit 260 via a control circuit l1. be done. On the other hand, a multi-frequency signal receiving register circuit 30 is provided on the output side of the main channel network 10.
0 is connected. Each register circuit 300
are a multi-frequency signal detection circuit 320 and a counting circuit 33.
0, a numerical information storage 340 and an interface circuit 350, and is connected to a register control circuit 360 via a control circuit 12. Also, the control line l
3, l4, and l5 respectively line control circuit 260, main channel network 10, and register control circuit 36.
A central control circuit 60 connected to 0 is connected to a memory circuit 61 that stores various exchange processing programs.

In the telephone exchange configured as described above, when the rotary dial telephone 50 makes a call, the state transition is read into the line control circuit 260 via the interface circuit 250 having a call detection function in the line circuit 200, and Control circuit 60
is sent as call information. When the central control circuit 60, which operates according to the program in the memory circuit 61, detects a call from the telephone 50, the central control circuit 6
0, a dial tone is sent to the telephone set 50 from a signal source (not shown) connected to the main channel network 10, for example. The dial pulse sent from the telephone 50 is sent to the dial pulse detection circuit 22 via the line circuit 200 and the telephone call circuit 210.
0, it is detected distinguishing it from other signals such as noise, is sequentially counted by the counting circuit 230, and is sent to the numerical information storage circuit 2.
4 is temporarily stored. The accumulated numerical information is sent from the interface circuit 250 to the central control circuit 60 via the line control circuit 260. The central control circuit 60 sequentially stores the received numerical information in a temporary storage circuit 62, analyzes it, and controls connection route selection with the called telephone.

Next, a case will be described in which a selection signal in a multi-frequency signal format sent from the push-button telephone 40 is received. Call detection for the telephone 40 is performed in the same manner as in the case of the rotary dial telephone 50 described above, using the interface circuit 2 of the line circuit 200.
50 and line control circuit 260 in central control circuit 60 . Thereafter, the central control circuit 60 performs an empty selection of the multi-frequency signal receiving register 300 connected to the main channel network 10, and after transmitting a dial tone to the telephone set 40,
The telephone 40 controls the connection route of the main channel network 10.
and the multi-frequency signal receiving register 30 are connected. The multi-frequency signal from the telephone 40 passes through the communication circuit 210 of the line circuit 200 and the main communication channel network 10, and then reaches the multi-frequency signal detection circuit 3 of the register circuit 300.
20, sequentially counted by a counting circuit 330, temporarily stored in a numerical information storage circuit 340, and then sent from an interface circuit 350 to a central control circuit 60 via a register control circuit 360. The central control circuit 60 has a temporary memory circuit 62
The connection to the called party is controlled based on the numerical information stored in the terminal.

It should be noted that the main channel network 10 shown in the embodiments described above may be either a space-division switch or a time-division switch. In addition, each line circuit 2
It is also possible to accommodate a plurality of telephones in 00 depending on the frequency of use.

As explained above, according to the present invention, counting is facilitated by intermittent DC signals among selection signals sent from various subscriber terminal equipment such as rotary dial telephones and push-button telephones accommodated in the main communication channel network. Dial pulses are counted in a line circuit housed on the main channel network input side, and multi-frequency signals that are not easy to count and complicate the circuit are accommodated in a selectively connectable manner on the main channel network output side. By counting in a register circuit, it is possible to reduce the incidence of invalid calls and improve service without causing a significant increase in equipment costs.

In addition, as mentioned above, the selection signal counting process can be performed by counting independently in the line circuit or register circuit depending on the type of selection signal, and temporarily storing it as necessary and sending it to the central control circuit. Therefore, the control program can be simplified and the processing capacity of the central control circuit can be improved.

[Brief explanation of the drawing]

FIG. 1 is a block diagram illustrating an example of a conventional selection signal counting method, and FIG. 2 is a block diagram illustrating an embodiment of a selection signal counting method according to the present invention. 10...Main communication channel network, 40...Push button telephone, 50...Rotary dial telephone, 60...
... Central control circuit, 61 ... Program memory circuit, 62 ... Temporary storage circuit, 200 ... Line circuit, 210 ... Call circuit, 220 ... Dial pulse detection circuit, 230 ... Dial pulse counting circuit, 240 ... Numerical information storage circuit, 250...interface circuit, 260...line control circuit, 300...multifrequency signal receiving register circuit, 3
20...Multi-frequency signal detection circuit, 330...Multi-frequency signal counting circuit, 340...Numeric information storage circuit, 3
50...Interface circuit, 360...Register control circuit.

Claims (1)

[Claims] 1. A vial pulse signal counting means is provided in each line circuit connected between the input side of the main channel network and the subscriber terminal equipment, and a register circuit having a multifrequency signal counting means is installed in each line circuit connected between the input side of the main channel network and the subscriber terminal equipment, and Provided in common for some of the subscriber terminal equipment on the output side of the network, if the selection signal sent from the subscriber terminal equipment is a dial pulse signal, the line circuit counts the selection signal; A selection signal counting method in a telephone exchange, characterized in that if the selection signal is a multi-frequency signal, the selection signal is counted by the register circuit.