JPH02284560A - User's simple exchange equipment - Google Patents

Abstract

PURPOSE:To eliminate the restriction of the number of telephone sets to be connected by installing telephone plug sockets having telephone moduler jacks and speakers between the telephone sets and a call control circuit and providing circuits driving the speakers by means of receiving the detection signals of incoming signals in place of pseudo ringing tone generation circuits. CONSTITUTION:When the incoming signals are transmitted in public telephone lines L1 and L2, an incoming call detection circuit 1 detects the incoming signals, and transmits them to the arithmetic processing circuit 2. It transmits the detection signals to a melody IC 5, which transmits driving signals for outputting a ringing tone equivalent to a line wire ringing tone from the speakers SP. The driving signals are amplified in a driving signal transmission circuit 6 and are transmitted to the telephone plug sockets TC1-TCn installed at the outer part of a user's simple exchange equipment mainbody P through lines S1 and S2. The driving signals are inputted to the speakers SP in the telephone plug sockets TC1-TCn, and the ringing tone is emitted from the speakers.

Description

DETAILED DESCRIPTION OF THE INVENTION [Field of Industrial Application] The present invention relates to a simple in-home switching device for connecting a telephone, a doorbell, etc. to a public telephone line.

[Conventional technology]

As shown in FIG. 4, the conventional simple home switching device P detects an incoming call signal (ringer ring signal) from the public telephone lines L+ and L2 using an incoming call detection circuit 1, and Upon receiving the signal, the arithmetic processing circuit 2 performs
A drive signal for the pseudo ringing signal generation circuit 4 is sent out. The pseudo ringing tone signal generating circuit 4 generates a pseudo ringing tone signal (75cm, 16Hz) that is the same as the incoming call signal. This pseudo ring tone signal is input to each telephone meter device n connected to the telephone modular jack MJ via the call control circuit 3, and is designed to ring the ringer of each telephone device L to position N. Ta.

Here, in the above conventional example, to each telephone metering device n,
The public telephone lines Ll and L2 are not directly connected, but are connected via the call control circuit 3. Therefore, since the incoming call signal is not directly input to the telephone metering device n, the pseudo ring signal from the pseudo ring signal generation circuit 4 is input. The reason for this will be explained next. In other words, telephone position L
According to the technical standards that must be followed by equipment, there is a restriction that the total capacitor component connected to the line must be 3 μF or less, and if it is a telephone meter device that usually has a capacitance of 0.5 μF to 1 μF, You will only be able to connect up to 3 devices. Therefore, when connecting four or more telephone sets L to N per line, it is not possible to connect the telephone sets I to N directly to the line, and a pseudo ring tone signal is sent to the simple in-home switching device P. This is because it was necessary to create and send it to telephone stations I to N.

[Problem to be solved by the invention]

However, the pseudo ringing signal generating circuit 4 in the above conventional example consumes a large amount of power, and the power consumption increases according to the number of connected telephones.
There were problems such as the need for a large-capacity transformer inside.

The present invention has been made in view of the above points, and its purpose is to eliminate the limitation on the number of telephones that can be connected, and to solve the problem that even when a large number of telephones are connected, a large amount of power consumption occurs. The purpose of the present invention is to provide a simple in-home switching device that does not require

[Failure to solve the problem]

The present invention detects an incoming signal from a public telephone line, receives the detection signal of the incoming signal, and generates a pseudo ring tone signal equivalent to a ring signal transmitted through the public telephone line by a pseudo ring generation circuit. , and sends the pseudo ring tone signal to a plurality of telephones via a call control circuit to ring a ringer of each of the telephones, wherein each of the telephones and the call control circuit A telephone outlet having a telephone modular jack and a speaker is installed between each of them, and in place of the pseudo ring tone generating circuit, the circuit is configured to receive a detection signal of the incoming call signal and drive the speaker to generate a ring tone. This device is characterized by being equipped with a speaker drive circuit.

[Effect]

According to the simple home switching device of the present invention, when an incoming call signal is transmitted within a public telephone line, this incoming signal is detected by the incoming call detection circuit, and the speaker drive circuit drives the speaker built in the telephone outlet. A driving signal is sent out to notify the user of the incoming call, and a ringing tone is generated from the speaker to notify the user of an incoming outside line.

〔Example〕

Hereinafter, one embodiment of the present invention will be described based on the drawings.

FIG. 1 is a block diagram showing one embodiment of the present invention. L
, ,L, are public telephone lines connected to the telephone office. Reference numeral 1 denotes an incoming call detection circuit, which detects an incoming call signal transmitted from the telephone office through the public telephone line, L2. FIG. 2 shows an example of the incoming call detection circuit 1, in which the telephone exchange on the L2 side is connected to a public telephone line.
Resistor R (resistance value is, for example, 30Ω
), DC voltage (48V) and AC voltage (75■rms)
A Zener diode ZD (generally 62V to 82V) that turns on only when an incoming signal with superimposed
It is composed of a photocoupler P1, a resistor R2, a resistor R3, etc. When an incoming signal arrives, the Zener diode ZD turns on, turning on the photocoupler P1, which causes the output OUT to go low, notifying the arithmetic processing circuit 2 (to be described later) that the incoming signal has arrived. . Reference numeral 2 denotes an arithmetic processing circuit, which notifies the later-described call control circuit 3 and the later-described melody IC 5 that an incoming call signal has been detected. Reference numeral 3 designates a call control circuit, which uses the detection signal from the arithmetic processing circuit 2 to perform switching to connect the public telephone lines LI, L2 and necessary telephone sockets TC1 to TCn (to be described later), and to connect the telephone to the telephone (to be described later). Switching between telephone outlets TCI to TCn for extension calls between stations L to N, and door phone 8 and telephone outlets TCI to TCn for calls between doorphones 8 and telephone stations L to N, which will be described later.
Switch between the two.

5 is a melody IC, and when a detection signal is input,
A driving signal is generated for driving a speaker SP built in each of the telephone outlets TCI to TCn, which will be described later, to cause the speaker SP to output a ringing tone. 6
is a drive signal sending circuit which amplifies the drive signal from the melody IC 5 and sends it to the telephone outlets TCI to TC,n. The melody IC 5 and the drive signal sending circuit 6 constitute a speaker drive circuit K.

Both the melody IC 5 and the ringing tone sending circuit 6 are circuits that operate at 5V, and their power consumption is greatly reduced compared to the conventional pseudo ringing tone generating circuit 4 which needs to generate a voltage of 75V.

TCI to TCn are telephone outlets, and as shown in FIG. 3, they have a built-in speaker SP and a telephone modular jack MJ.
Lines TI, T2 and public telephone lines L+, L connected to
Make a connection with z. The public telephone lines LI and L2 are connected to the line Tl5Tz when making an outside line call, and are connected to the extension line in the call control circuit 3 when making an extension call or a doorphone call.

In the telephone outlets TCI to TCn, when a speaker drive signal corresponding to an outside line ringtone, a doorbell ringtone, an extension ringtone, etc. sent from the speaker drive circuit K connected by lines S and S2 is input, a signal is output from the speaker SP. A ring tone is emitted. Moreover, the telephone outlet TCI-TCn is provided with a telephone modular jack MJ, and the telephone meter device n is connected to the telephone modular jack MJ of the corresponding telephone outlet TCI-TCn. 7 is a door phone interface that detects a door phone incoming signal from the door phone 8 and transmits it to the arithmetic processing circuit 2. Note that P indicates the main body of the simple in-home switching device.

Next, the operation of this embodiment will be explained. Public telephone line L+
, Lz, that is, when an outside line is received, the incoming signal is detected by the incoming call detection circuit 1 and sent to the arithmetic processing circuit 2. At this time, the connection between the public telephone line L2 and the telephone equipment L to N is cut off by the call control circuit 3. The arithmetic processing circuit 2 sends a detection signal to the melody IC5, and the melody IC5
Now, a drive signal for producing a ringing tone corresponding to an outside line ringing tone is sent from the speaker SP. The drive signal is amplified by the drive signal sending circuit 6 and sent to telephone outlets TCI to TCn installed outside the simple home switching device main body P via lines S, , S2. The drive signal is input to the speakers SP in the telephone sockets TC1 to TCn, and a ring tone is emitted from the speaker SP.

When telephone engineer L picks up the handset after hearing this ring tone, lines T+ and Tz connected to telephone outlet Tc1 and public telephone lines L+ and L2 are connected by call control circuit 3, allowing outside calls. becomes.

For internal/line calls, for example, when calling from telephone engineer I to telephone engineer 2, line T connected to telephone outlet TC1 is used.
I, T2 and the lines T, , T, connected to the telephone outlet TC2 are connected by the call control circuit 3. In the case of a doorphone call, the doorbell 8 and telephone equipment L to N are connected via the doorphone interface 7, the arithmetic processing circuit 2, and the call control circuit 3. In both the case of an internal call and the doorphone call, the ring tone is emitted from the speaker SP in the telephone outlets TCI to TCn, as in the case of an external call.

〔Effect of the invention〕

As described above, the present invention detects an incoming call signal from a public telephone line, generates a pseudo ring signal equivalent to a ring signal transmitted through the public telephone line by a pseudo ring generating circuit, and A simple in-home switching device is configured to send a ringing tone signal to a plurality of telephones via a call control circuit, and to make a ringer sound on each of the telephones. - Telephone outlets each having a jack and a speaker are installed, and in place of the pseudo ring tone generation circuit, a speaker drive circuit is provided for receiving the detection signal of the incoming call signal and driving the speaker to generate a ring tone. Therefore, in the past, the ringer was generated by driving the ringer of the telephone using a pseudo ringer generating circuit which consumed a large amount of power.
Since the ring tone is generated by driving the speaker in the telephone outlet using a speaker drive circuit with low power consumption, there is no limit to the number of telephones that can be connected, and even if a large number of telephones are connected, it will not take much time. We were able to provide a simple in-home switching device that does not consume as much power.

[Brief explanation of drawings]

FIG. 1 is a block diagram showing an embodiment of the present invention. FIG. 2 is a circuit diagram showing an incoming call detection circuit according to the above. FIG. 3 is a schematic diagram showing a telephone outlet according to the above. FIG. 2 is a block diagram illustrating an example. 1 - Incoming call detection circuit 2 - Arithmetic processing circuit 3 - Call control circuit 4 - Pseudo ring generation circuit 5 - Melody - IC
6-Drive signal sending circuit 7-Door phone interface 8-Door phone L, L2-Public telephone line TC1~TCn-Telephone line 7-1=:/)TE L1~
T E L n - Telephone SP - Speaker MJ - Modular Jack - Speaker drive circuit P - In-home simple exchange device main body

Claims (1)

[Claims] (1) Detects an incoming signal from a public telephone line, receives the detection signal of the incoming signal, and generates a pseudo ring tone signal equivalent to the ring signal transmitted within the public telephone line using a pseudo ring generation circuit. A simple in-home switching device that generates a pseudo ring tone signal, sends the pseudo ring tone signal to a plurality of telephones via a call control circuit, and causes each of the telephones to ring.
A telephone outlet having a telephone modular jack and a speaker is installed between each of the telephones and the call control circuit, and the speaker is driven in response to a detection signal of the incoming call signal instead of the pseudo ring generating circuit. 1. A simple in-home switching device characterized by comprising a speaker drive circuit for generating a ring tone.