JPS59212098A - Key telephone set - Google Patents

Abstract

PURPOSE:To reduce the cost of a system by storing an incoming tone source and a warning tone source in a main device. CONSTITUTION:When there is an incoming signal from a truck line, an incoming detecting circuit 18 detects the incoming and sends a signal to a CPU19. The CPU19 closes a link switch 9 and an incoming tone is sent from a generating circuit 5 to a TEL1 through an amplifier 16, input/output transformer 13, link switch 9, input/output transformer 12, hybrid transformer circuit 4, amplifier 7, and speaker 8 in order. The CPU19 counts the time and switches the link switch 9 to a switch 10 unless the TEL1 answers within a specific time. Consequently, an incoming warning tone is sent out of a warning tone generating circuit 6 to the TEL1 through an amplifier 17, input/output transformer 14, link switch 10, input/output transformer 12, hybrid transformer circuit 4, amplifier 7, and speaker 8 in order.

Description

DETAILED DESCRIPTION OF THE INVENTION Field of Industrial Application The present invention relates to a button telephone device used in companies, factories, etc. that conduct office work by telephone.

Conventional configuration and its problems FIG. 1 shows a conventional key telephone device.

The configuration of this conventional example will be explained below with reference to FIG. 1.

In Figure 1 on page 2, (nl, (ln2 is the central line and T) 11,
71. n indicates a telephone. Further, 1 is a main device that performs the exchange function of this device. The inside of the broken line shows the internal structure of the telephone, 2 is a transmitter, 3 is a receiver, 4 is a hybrid transformer circuit that converts from 2 wires to 4 wires, 6.6 is a ring tone and incoming call alarm generation circuit, 7 is an amplifier, and 8 is a speaker.

Conventionally, when a call is received from a central office line, the central control circuit (CPU) provided inside the main device 1 sends a control signal to the telephone, activates the ring tone generating circuit 6 of Th11, and activates the amplifier 7. A ringtone is output from speaker 8 through the cable. After a certain period of time of response in this state, the ring tone generating circuit 6 is stopped by a control signal from the main device 1, and the alarm tone generating circuit 6 is activated, and the ring tone is changed to an alarm tone.

This device requires a circuit for generating both a ring tone and an alarm sound inside each telephone, and as the system becomes larger, the number of telephones increases by 6, resulting in an increase in price.

OBJECTS OF THE INVENTION 31.--It is an object of the present invention to eliminate the problems of the above-mentioned conventional examples and to provide a button telephone device having an incoming call alarm function at a low price.

DESCRIPTION OF THE INVENTION In order to achieve the above-mentioned object, the present invention has a system in which a ring tone and an alarm tone generating circuit are included in the main device, and only an amplifier and a speaker are included in the telephone.

DESCRIPTION OF EMBODIMENTS An embodiment of the present invention will be specifically described below with reference to the drawings.

FIG. 2 is a block diagram showing the configuration of an embodiment of the present invention. Co1, Co2, total, position n and 1 to 8 are the first
It has the same function as the one shown in the figure. In this embodiment, a ring tone generation circuit 6 and an alarm tone generation circuit 6 are built into the main device 1. Note that 9°1o is a link switch that connects the signals from the ring tone generation circuit 5 and the alarm tone generation circuit 6 to the telephone set. In this embodiment, only one ring tone generation circuit 5 and one alarm tone generation circuit 6 are required in the main device 1, and the incoming call alarm function can be realized at a low cost.

FIG. 3 shows the configuration of FIG. 2 in more detail.

In Figure 3, CO is the office line, total is the telephone, 1 is the main unit, 2, 3, 4, 7.8 are the same circuits inside the telephone as in Figure 2, and 6, 6 are the ring tone generation circuit and alarm. This is a sound generation circuit. Reference numerals 9 to 11 are link switches that connect a telephone to a central office line or to a ring tone circuit. 12-16
performs impedance conversion at the input and output quadrance.

16. 17 is an amplifier, 18 is an incoming call detection circuit from the central office line,
19 is a central control circuit (CPU) that provides control signals to each circuit;
).

Next, the operation will be explained. In Fig. 3, when there is an incoming call from the central office line, the incoming call detection circuit 18 detects the incoming call.
Send a signal to pu 19. The CPU 19 closes the link switch 9, and the ringtone is generated from the circuit 6 → multiplier 16 → input/output quadrangle 13 → link switch 9 → input/output quadrangle 12 →
The hybrid transformer circuit 4→amplifier 7→speaker 8 leads to the output from the speaker 1. From this state, 0pu19 changes the time to 5 pages, and if the device does not respond within a certain period of time, link switch 9 is switched to 10. If there is a response, the link switch is switched to 11 and the call is made to a central office line. When the link switch is switched to 10, the alarm sound generation circuit 6 to the amplifier 1
7 → Input/output quadrant 14 → Link switch 10 → Input/output quadrant 12 → Hybrid transformer circuit 4 → Multiplier 7
→An incoming call alarm sounds on the speaker 8 route.

Although the incoming call alarm sound is generally louder and more intense than the ringtone, it is possible to generate various sounds by changing the alarm sound generation circuit 6 according to the user's needs.

Effects of the Invention The present invention is directed to the above-mentioned exocytotic acid, and provides the following effects.

(1L) By housing the incoming call sound source and the alarm sound source in the main device, the system cost can be reduced and the incoming call alarm function can be realized.

fb) Various sounds can be created to suit the user by changing the sound source or connecting an external sound source for the alarm sound.
-What ability is there?

(cl) The incoming call alarm can be performed not only in one stage but also in several stages by adding a link switch.

[Brief explanation of the drawing]

FIG. 1 is a block diagram of a conventional button telephone device, FIG. 2 is a block diagram of a button telephone device according to an embodiment of the present invention, and FIG. 3 is a more detailed block diagram of FIG. 2. Go, Co1. Co2−・・・Station line, place, total, place n
. ......Key telephone, 1...Main device of the key telephone, 4...Hybrid transformer circuit, 6...Ring tone generation circuit, 6... ...Alarm sound generation circuit, 9-11...Link switch, 1
8... Office line incoming detection circuit, 19... Central control circuit.

Claims (1)

[Claims] A button telephone device comprising a plurality of telephones connected to a recorder device by a communication line, and an amplifier and a speaker for generating a ring tone or an alarm sound based on a signal from the ring tone or alarm sound generation circuit.