JPS60183897A - Wire broadcast telephone exchange - Google Patents

Abstract

PURPOSE:To enable a high rate transmission of telephone number information for connecting subscribers mutually between two stations by a simple I/O circuit by providing a serial transmission means for transmitting/receiving data between other exchanges in a variance system exchange. CONSTITUTION:A central controller 21 in an exchange is microcomputerized, where a microcomputer package 17 and a serial I/O package 20 are connected by a data bus 22. The serial I/O package 20 is connected to a MODEM24 by an interface cable 23. Exchanges 26-28 are connected mutually by serial transmission signal lines 35-37 through MODEMs 29-34, and sound signal lines 38-40 are separately connected mutually. For example, in case where a caller 42 makes a call to a subscriber 42, a telephone number is transferred from the exchange 26 to the exchange 27 through the MODEM30, on the basis of which a connection is made, thereby enabling the subscribers 41 and 42 to make a call by using the sound signal line 38.

Description

DETAILED DESCRIPTION OF THE INVENTION (Technical Field) The present invention relates to a cable broadcasting telephone exchange system, and particularly to a central control unit having a serial transmission interface as a method of transmitting telephone number information in a distributed type switch configuration. It is.

(Prior art) The main function of a cable broadcasting telephone exchange (hereinafter referred to as a cable broadcasting exchange) is to transmit a broadcast signal to a speaker built into each subscriber's telephone or attached with an ID. There are two functions: voice output function and mutual connection Af function between subscribers' TD calls.

In addition, there is a centralized method in which telephone exchange equipment is installed for subscribers in a specific area, a centralized method in which a single exchange is installed in a central office, and a
, 1[j There are two methods: a distributed method in which a number of exchanges with interconnection functions are installed.

In this distributed type of exchange, when interconnection between subscriber telephones is performed between two exchanges, the caller's exchange is connected to the called party's exchange. Telephone number information needs to be conveyed in some way.

In conventional cable broadcast exchanges, this T-talk street number information is transmitted by a step-by-step method or by a common control method using an outgoing sender and an incoming υ register. However, these methods mainly have a circuit structure that uses relays, so
The transmission speed is slow and requires a dedicated and complicated relay circuit.
This resulted in a decline in service to subscribers and an increase in manufacturing costs.

(Object of the Invention) The main object of the present invention is to provide a wired broadcasting telephone device capable of transmitting telephone number information for interconnecting subscribers between two stations at high speed using a simple input/output circuit. It is about providing.

(Structure/Function) The main features of the present invention are a call path switch that detects the hook of a plurality of telephones, and connects a subscriber-saving line, and other exchanges that connect incoming and outgoing calls. a trunk circuit, and a central control circuit that controls the circuit is provided with means for inputting and outputting serial data, and transmitting Kanban numbers to other stations;
The point is that you can receive phone numbers from other stations.

According to the present invention, it is possible to transmit serial signals and telephone number information through two serial signals and a standard modem, so the configuration can be simplified and high-speed transmission can be performed. You can do it.

(Example) Next, the present invention will be described in detail with reference to the drawings.

FIG. 1 is a block diagram of a line broadcast rα talk switching device 4, which is an embodiment of the present invention. This telephone exchange equipment is connected to a speaker for transmitting broadcast audio to a large number of subscribers equipped with handsets (and also to a speaker for transmitting broadcast audio).
3, subscriber circuits 4, 5, . . . 6 for inserting the call status of each subscriber name and controlling the transmission of audio signals from the broadcasting amplifier 11, a call path switch 7 for connecting the lines, and a dial. A calling register 8 for receiving information, an intra-office trunk 9 necessary when the called party is in the own office, and an outgoing/receiving trunk 10 to be connected when the called party is in another office;
Each subscriber circuit 4, 5...6L communication path switch 7, each trunk circuit 8, 9 . A central control unit 13 for detecting the state of IQ etc. and performing necessary control, and an f10 circuit 12 which is an interface for the central 1lb11 control equipment fi13.
A serial transmission modifier 6 (called a modem) 14 is controlled by the central control circuit 13.

The central diagonal system [12i] includes a serial transmission output circuit, and is converted into a microcomputer in this J'A example.

In this configuration example, one microphone and one computer are used.

The operation of the main structure 5i i'+J block is substantially the same as that of a conventional telephone exchange, and will not be described in detail since it is S.

FIG. 2 is a circuit block diagram of an embodiment of the present invention, in which the central control unit 13 of FIG. 1 is described in more detail.

The central control device 21 is implemented as a microcomputer, and a microcomputer package 17 and a serial input/output package 2o are connected by a data path 22. The microcomputer package 17 includes
A microcomputer 15 (called a CPU) and a memory 16 are included, and a serial input/output package 20
A serial input/output circuit 18 and an interface circuit 19 for connecting to a modem 24 are mounted on the frame, and are also connected to the modem 24 by an interface cable 23. An output signal line 25 from the modem is connected to a broadcast control device. The serial signal sent from the broadcast control station is demodulated by the modem 21, decoded by the serial input/output circuit 18 via the interface 9, and inputted to the CPU 15 as 8-bit data.

FIG. 3 is a block diagram showing the interconnection of cable broadcasting telephone equipment according to an embodiment of the present invention. The exchanges 26-28 connect serial transmission signal lines 35-3 via modenos 29-34.
7 are connected to each other, and the voice signal line 3
8 to 4\ are separately connected to each other. For example, when calling from subscriber 41 to subscriber 42, modem 29. Signal line 35. From exchange 26 to exchange 27 via modem 3\
The telephone number is transferred to the subscriber 41 and the subscriber 42 are connected according to the information, and the subscriber 41 and 42 can talk using the audio signal line 38.

[Brief explanation of drawings]

FIG. 1 is a schematic block diagram of a wired broadcasting telephone exchange device according to an embodiment of the present invention. FIG. 2 is a circuit block diagram showing the central control circuit of FIG. 1 in detail. FIG. 3 is a block diagram showing the interconnecting ribs 4 of the telephone exchange of FIG. In z1, 1 , 2 , 3 , 41 , 42 ,
4:'l...subscriber,'I + 5 H6・
....Subscriber circuit, 7..Call path switch, 8..Call register, 9..Trunk within own office, 1\...Call originating/receiving. Trunk, 11...
... Broadcasting amplifier ~ 12...1/() circuit, ],
3, 21... Central control circuit, 14, 24,
29, 30, 31° 32, 33, 34-...
Modem, 15...CPU. 16... Part of memory, 17... Microcomputer Hanokage, 18... Serial 1.10 circuit, 19... Modem interface times N, 2 &... ...Serial package, 22...
...Data bus, 23...Modem connection cable, 25.32', 35.36°37...Serial transmission signal line, 38.39.4\... Audio signal line, 26, 27. ．． 28...This is a cable broadcast exchange. L ---r --J

Claims (1)

[Claims] a plurality of telephones, a group of switches for connecting and connecting one of the four telephones to another telephone, and broadcasting means for outputting broadcast audio to the telephone; In a cable broadcast transliteration device that is equipped with a trunk circuit for connecting one of the telephones to another exchange device, data can be sent and received with the other exchange device. The telephone number information of the called party can be transferred using the serial transmission means when connecting to another switching device using the above-mentioned rank circuit. A wired broadcasting telephone exchange device characterized in that it has a configuration that allows it to operate at a temperature of 10°C.