JPS58170272A - Call tone transmitting system - Google Patents

Abstract

(57) [Summary] This bulletin contains application data before electronic filing, so abstract data is not recorded.

Description

DETAILED DESCRIPTION OF THE INVENTION (1) Technical Field of the Invention The present invention relates to a multiprocessor distributed control electronic switching system, and a device for sometimes checking a calling party's ringing tone to a called party's network and making a nine-call green advance. The present invention relates to a ringing tone transmission system that can eliminate phase delays between the ringing tone and the ringing signal by controlling the ringing tone and the ringing signal together with the called party's ringing signal.

(2) Background of the technology In recent years, active research has been conducted in electronic exchange@V systems with the aim of distributing control functions using a multiprocessor distributed control format to improve control efficiency and prevent failures from spreading. By adopting this multiprocessor distributed control mode, various problems that were not anticipated in conventional switching connections arise.

For example, one of the problems is the synchronization difference between the ringing tone for the calling party and the ringing signal for the called party.

0) Prior Art and Problems Figure 1 is a block diagram of ringing tone transmission control in a conventional multiprocessor distributed control electronic switching system, particularly in a distributed switching system in which the control range of the network control device is limited to each individual network. be.

In FIG. 1, 11 is a network #O, and 22 is a network control unit (CPUm) #n.

13 is the calling telephone (8TA-A), 2s is the called telephone (
STA-B”), 14 is a ringing trunk (RII
T) 30 is a signal bus, 24 is a switching relay, and 25 is a ringing signal generator (RG).

The ringing tone to the calling party (STA-A) 13 is transmitted by the ringing tone sending device (1
The calling party (STA-B) 23 receives the signal from the calling party's control unit (CPUn) 22 and sends the signal from the calling signal generator (RG) 25 to the called party (STA-B) 23. It was supplied by controlling a relay 24 corresponding to a telephone terminal. In this case, each network □4 21. +
2□11. Engineering, ga1.1゛ 7□. Yuuyuwayayagaga, yeah, 7'a (cyga.

Including the communication delay, there is a drawback that it is difficult to match the phases of the ringing tone and the ringing signal as shown in the second part.

(4) Purpose of the Invention In view of the above-mentioned drawbacks of the conventional art, the present invention supplies the ringing tone of the calling party to a nine ringing tone sending device accommodated in the called party's network, and controls the called party's side. It is an object of the present invention to provide a ringing tone and a ringing signal without phase delay by centrally controlling the device.

(5) Structure of the Invention According to the present invention, the object is to provide a control device capable of controlling only a plurality of networks and each individual network, and to connect a communication path between each network and between each control device. In a multi-processor distributed control electronic exchange SV system that is equipped with connecting information transmission paths and can operate as a single exchange, when controlling incoming calls, it is accommodated in one network and sent to nine calling party telephone terminals. The ringing tone is supplied by a ringing tone sending device housed in the network that accommodates the telephone terminal of the called party, and the ringing tone and the ringing signal are controlled by the control device that accommodates the telephone terminal of the called party. This is achieved by providing a ringing tone transmission method featuring:

Examples of embodiments of the invention Embodiments of the present invention will be described in detail below with reference to the drawings.

FIG. 3 shows a block diagram of a ringing tone transmission system according to the present invention.

In the figure, the same numbers as those shown in the first section indicate the same contents, and 26 is a ringing trunk (RBT) accommodated in the called party's network.

27 indicates a relay connecting a ringer generator (RG); each network (11 and 21) has an electric
Shimasue (13 and 23) is housed there. In addition, each of the old works is individually controlled by the control device (12 and 22), and the bisector # device (via the IT bus 30)
Accommodates in other networks and networks
(Control information for requesting control of the terminal that has been
The call from the ringing tone sending device 26 is received in the odd work 11 via the calling company communication path 31.

The calling signal is supplied from the calling signal generating device z5 to the telephone terminal 23 via a relay provided corresponding to the telephone terminal, and a bell within the telephone terminal rings. Further, phase control of the ringing tone and the ringing signal is performed by the control device 22, respectively.

In the distributed control exchange system in Chikyu Island, a call signal from a subscriber telephone terminal 13 housed in an odd work 11 is detected by a control device by a known means, and then the call signal is detected by the control device by a known means. The called subscriber is determined by the ＠虞 sign.

When the control device 12 identifies that the called party is accommodated in another network 21, the control device 12 requests the control device 22 to capture the empty ring tone sending device accommodated in the called party's network via the information transmission path 30. do. Based on the request, the control device @ 22 captures the empty discharge sound sending device 26 in its own system, and sends the communication path number accommodating the device via the information transmission path 30 to the control device f! ! Tell 12.

Based on the call path number, the control device 12 connects the call path and the calling telephone terminal via the network 11 via the bus t-ff1. After that, the control device 12 again sends a notification to the control device 22 via the information communication path 30 that the network bus connection has been completed.
tell to.

When the control device 22 learns that the bus connection has been completed, it simultaneously controls the nine relays 24 provided for the called party's telephone terminal and the relay 27 in the ringing tone sending device to send a ringing tone of the same phase to the calling telephone terminal 1.
3, a 1 ringing signal is supplied to the called telephone terminal 23.

FIG. 4 shows the ring tone/ring signal phase relationship in the present invention.

()) Effects of the Invention According to the present invention, in a distributed electronic switching system controlled independently by a plurality of control devices, ring tone and ring signal O control in incoming call processing can be concentrated in one control device. Therefore, regardless of the internal control procedure in each control device and the control request transmission time between control devices, it is possible to always supply a ring tone and a ring signal without phase delay to both the calling party and the called party. be.

[Brief explanation of the drawing]

@Figures 1 and 2 are diagrams explaining an example of a conventional ringing tone transmission method and the ringing tone/ringing signal phase relationship, and Figures 3 and 4
The figure is a diagram illustrating an embodiment of the ringing tone transmission method according to the present invention and its ringing tone/ringing signal phase relationship. In the figure, 11.21 is the network, 12.26 is the ringing tone sending device, 28 is the ringing device, 30 is the information transmission path, and 31 is the communication path. 3 eyes 4 sticks

Claims (1)

[Claims] Controlling the multi*0 network and side-by-side basics 1
A decentralized electronic switching system that is equipped with a simple control device, a communication path that connects the network controllers, and an information transmission path that connects the network controllers, and that can operate as a single switch as a whole. System KN,
During the ring control, a pre-call exit device housed in the network that accommodates the called party's telephone terminal supplies a ringing tone to be transmitted to the calling party's telephone terminal, which is accommodated in the telephone terminal of the called party. A ring tone transmission system characterized in that a ring tone and a ring signal 0 are controlled under a control device accommodating a called party's telephone terminal.