JPH02284559A - 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 socket having telephone moduler jacks and speakers between the telephone set and a call control circuit, receiving the detection signal of an incoming signal, driving the speakers and generating a ringing tone. CONSTITUTION:The telephone plug sockets TC1-TCn incorporate the speakers SP, and they have the telephone moduler jacks MJ, whereby they connect lines T1 and T2 connected to the telephone sets TEL1-TELn with public telephone lines L1 and L2. When a speaker driving signal corresponding to a line wire incoming tone, a doorphone incoming tone, an extension ringing tone and the like, which are transmitted from a speaker driving circuit K connected by lines S1 and S2 in the telephone plug sockets TC1-TCn, the ringing tone is emitted from the speakers SP. The telephone moduler jacks MJ are installed in the telephone plug sockets TC1-TCn, and the telephone sets TEL1-TELn are connected to the telephone moduler jacks MJ of the corresponding telephone plug sockets TC1-TCn.

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. 7, the conventional simple home switching device P detects the incoming call signal (ringer ring signal) from the public telephone lines L+ and Lz by the incoming call detection circuit 1; Upon receiving the signal, the arithmetic processing circuit 2 sends out a drive signal for the pseudo ringing tone signal generation circuit 4. The pseudo ringing signal generation circuit 4 generates a pseudo ringing signal (75 Hz, 16'Hz) that is the same as the incoming call signal. This pseudo ringing signal is input to each telephone metering 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 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, as a technical standard that telephone equipment L to equipment N must comply with, there is a restriction that the total capacitor component connected to the line must be 3 μF or less, and telephone equipment equipment N, which usually has a capacitance of 0.5 μF to 1 μF, If so, you will only be able to connect up to 3 devices. Therefore, 4 or more telephones per line
When connecting telephone stations L to N, it is not possible to directly connect telephone stations L to N to the line, and it is necessary to create a pseudo ring tone signal on the simple home switching equipment P side and send it to telephone stations L to N. Because there was.

[Problem to be solved by the invention]

However, the pseudo ring signal generation 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

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

[Means to solve the problem]

The present invention provides a pseudo ring generating circuit that 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 within the public telephone line. In the simple home switching device, the simulated ring signal is generated by a call control circuit, and is sent to a plurality of telephones via a call control circuit, so that each of the telephones rings. 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. It is equipped with a speaker drive circuit, and up to a predetermined number of telephones, by connecting a public telephone line to each of the telephones, the ringer tone of each of the telephones is produced, and to other telephones, the speaker is driven without connecting the public telephone line. The present invention is characterized in that a ring tone is emitted from the speaker in response to a speaker drive signal from a circuit, and in the above invention, a pseudo ring tone generating circuit is left and a public telephone line is connected to each of the telephones up to a predetermined number. By connecting to
A ringer tone is generated for each of the telephones, and for other telephones, the ringer tone is generated by the pseudo ringing tone signal and the ringer tone is generated by the speaker drive signal. be.

[Effect]

According to the simple home switching device of the present invention, when an incoming call signal is transmitted within a public telephone line, a predetermined number of telephones will ring their built-in ringers in response to the incoming call signal, and other telephones will In this case, a ring tone is emitted from a speaker built into a telephone outlet in response to a speaker drive signal sent from a speaker drive circuit. In addition, if a pseudo ring generating circuit is also used, for telephones other than the predetermined number,
It can also make a ringer sound.

〔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
1 and LZ are public telephone lines connected to the telephone office. 1 is an incoming call detection circuit, which connects the telephone station to the public telephone line L.
This is to detect incoming signals transmitted through the LZ. Figure 2 shows an example of the incoming call detection circuit I, which is designed to prevent the flow of current (generally more than a few mA) that the telephone exchange on the public telephone line side considers to be a closed line. resistor R1 (resistance value is, for example, 30 Ω), and a Zener diode ZD that turns on only when an incoming signal with AC voltage (75 rms) superimposed on DC voltage (48 V) arrives (generally 62 V). ~82■), a photocoupler P0, a resistor R2, a resistor R3, etc. When an incoming signal arrives, the Zener diode ZD,
turns on and turns on the photocoupler P+,
The output OUT + becomes low level, and notifies the arithmetic processing circuit 2, which will be described later, that an incoming signal has arrived. Reference numeral 2 denotes an arithmetic processing circuit, which notifies the later-described call control circuit 3 and later-described melody IC 5 that an incoming call signal has been detected, and also notifies the later-described drive signal sending circuit 6,
It issues a control signal to which of the telephone outlets TCI to TCn (to be described later) the output is sent. To set which telephone outlet TCI to TCn is selected, use the separately provided setting switch (
(not shown). 3 is a call control circuit;
An example is shown in the figure. Based on the detection signal from the arithmetic processing circuit 2, switching is performed to connect the public telephone lines L+ and Lz to necessary telephone outlets TCI to TCn, which will be described later, as well as internal calls between telephone equipment I and N, which will be described later. Switching between the telephone outlets TCI to TCn for communication, and switching between the doorphone 8 and the telephone outlet TCI to TCn for calls between the doorphone 8 and telephone equipment L to station n, which will be described later, are performed. In other words, switch A...
By switching between B, -A, and Ba (set by a separately provided setting switch (not shown)), the lines T, , T, , which come out from the telephone outlets TCI to TCn are switched.
~Tl-A+T2-11 and public telephone lines L+, LZ or line I from the cross-point switch 10 described later
Switches connections between LI to ILn. Reference numeral 10 designates a cross-point switch that responds to, for example, an extension call between extension 4 (telephone operator 4) and extension n (telephone operator n), or a doorphone call between extension 5 (telephone operator 5) and doorbell 8. A commercially available crosspoint IC is used to form a communication path. switch A
. In the example in Figure 4, extension 1 (telephone engineer L)
~Extension 3 (telephone technician 3) is connected to the public telephone line LZ, and extension 4 (telephone technician 4) to extension n (telephone technician n) are disconnected from the public telephone lines L, Lz.

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 IC5 and connects one of the telephone outlets TCI to TCn.
Necessary telephone outlets (TC4 to TCn in this example)
Send to. In other words, the drive signal sending circuit 6 receives data from the arithmetic processing circuit 2 based on the settings of the setting switch (not shown).
A control signal from the controller controls whether or not to send an output. This means that there is no need to send speaker drive signals to extensions 1 (telephone operator L) to extension 3 (telephone operator 3) connected to public telephone lines Ll and LZ, and extension 4 (telephone operator n) This is because only the speaker SP corresponding to extension n (telephone operator n) needs to be sounded.

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, compared to the case where the conventional pseudo ringing tone generation circuit 4 is used, which requires generating a voltage of 75V when producing a ringing tone. As a result, power consumption is greatly reduced.

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.
A connection is made between the lines T + and T z connected to the public telephone lines T + and L, respectively. Public telephone lines L+ and Lz are connected to lines T1 and T2 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.

For telephone outlets TCI to TCn, lines S1 and S2
When a speaker drive signal corresponding to an outside line ringing tone, door phone ringing tone, extension ringing tone, etc. sent from the speaker drive circuit K connected to the speaker SP is input, a ringing tone is emitted from the speaker SP. Further, the telephone outlets TCI to TCn are provided with telephone modular jacks MJ, and the telephone meter device n is connected to the corresponding telephone outlets TCI to TCn.
is connected to the telephone modular jack MJ.

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.

In addition, P indicates the main body of the simple in-home switching device, and C11 to C1
n is telephone outlet TCI~TCn, telephone engineer L-place n
A constant current source is shown for supplying current to. Dl and D2 are lines for connecting the crosspoint switch 10 and the doorphone interface 8.

Next, the operation of this embodiment will be explained. Currently, according to the technical standards that telephone engineers I to N are required to follow, among the telephone engineers I to N,
Assume that only up to three devices can be connected to the public telephone lines L1 and L2, and, for example, telephone equipment L to 3 are directly connected to the public telephone lines L1 and L2.

This is set in advance with a setting switch (not shown), and the call control circuit 3 receives a control signal from the arithmetic processing circuit 2.
It is sufficient to switch the switches A, , B, ~A7, and B7.

When an incoming signal is transmitted through public telephone lines L+ and L2, that is, when an outside line is received, the incoming signal is detected by an incoming call detection circuit 1 and sent to an arithmetic processing circuit 2.

At this time, public telephone lines L1 and L2 and telephone equipment 4 to
The connection with the communication control circuit 3 is cut off by the communication control circuit 3. The arithmetic processing circuit 2 sends a detection signal to the melody IC 5,
In the melody IC5, 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 the line S I
-4,S N-4 to lines S, -, , S, □ are sent to telephone outlets TC4 to TCn installed outside the simple home switching device main body P.

The drive signal is input to the speakers SP in the telephone outlets TC4 to TCn, and a ring tone is emitted from the speaker SP.

At the telephone station L~3, the incoming signal on the public telephone line,
The ringer of station a itself is emitted as a ringing tone.

When the telephone operator L picks up the handset after hearing this ring tone, the lines TI and T2 connected to the telephone outlet TC1 and the public telephone lines ,L, are connected by the call control circuit 3, and the outside line is connected. You can now make calls.

When making an extension call, for example, from telephone operator 4 to telephone operator N, line Tl connected to telephone outlet TC4 is used.
-4, T2-4 and the line T, -7, T2-Il connected to the telephone outlet TCn are connected by the call control circuit 3. In the case of a doorphone call, the doorphone 8 is connected to the telephone equipment 4 to station n via the doorphone interface 7, the arithmetic processing circuit 2, and the call control circuit 3. Whether it's an internal call or a doorbell call,
The ring tone is the same as when making an outside line call.
Emitted from speakers SP within C4 to TCn.

Here, if you want to make an extension call or a doorbell call at the telephone @ locations L to 3, a setting switch (not shown) causes the drive signal sending circuit 6 to send a mosspeaker drive signal to the telephone outlets TCI to TC3. Just do it like this.

According to this embodiment, telephones 4 to 4 which are not connected to the public telephone lines L+ and Lz do not receive an incoming call signal of 16Hz and 75Vrms, so they can be used as telephones with an automatic answering function such as an answering machine or a fax machine. If applied equipment is connected, it will not work, but the public phone line L+
, Telephone installations I to 3 connected to L2 are 16Hz, 7
Since a 5Vrms incoming call signal is input, it is possible to operate even if the above-mentioned telephone application equipment is connected. Moreover, in order to generate a ring tone, without using the pseudo ring tone generation circuit 4,
Since the low power consumption speaker drive circuit K is used, there is no limit to the number of connected telephones, and even if a large number of telephones are connected, a large amount of power consumption does not occur.

FIG. 5 is a block diagram showing another embodiment of the present invention, and FIG. 6 is a circuit diagram showing the call control circuit 3 in this embodiment. In this embodiment, in addition to adding a pseudo ring tone generation circuit 4 to the above-mentioned embodiment, switches 01 to Cゎ for switching the connection to the pseudo ring generation circuit 4 are added in the call control circuit 3. has been done.

In this embodiment, in the above embodiment, a public telephone line,
, L2, and which is configured to emit a ring tone from the speaker SP in response to a drive signal from the speaker drive circuit K, the pseudo ring tone generation circuit 4 may be installed as needed. Pseudo ring signal (16Hz,
75Vrms), the ringer tone of telephones 4 to 4 is sounded. The connection state of the call control circuit 3 is as follows.
As shown in Figure 6, extension 4 (telephone i) to extension n
(telephone installation n) is switch A, , B, ~All, BI
, and are connected to the pseudo ring tone generation circuit 4 via switches 04 to Cfi. In this embodiment, all of the telephones 4 to 5n are connected to the pseudo ring tone generation circuit 4, but any telephone can be set.

In addition, if all that is required is to connect all of the telephone installations 4 to 4 to the pseudo ring generation circuit 4,
In FIG. 5, the speaker drive circuit may be omitted.

According to this embodiment, compared to the case where all the telephones m to I to n are connected to the pseudo ring generator circuit 4, at least the telephones from I to 3 connected to the public telephone lines Ll and Lm are The power consumption of the simple in-home switching device main body P can be reduced.

〔Effect of the invention〕

As described above, the present invention detects an incoming signal from a public telephone line, uses a pseudo ring generation circuit to generate a pseudo ring signal equivalent to a ring signal transmitted within the public telephone line, and A simple in-home switching device is configured to send a pseudo ring tone signal to a plurality of telephones via a call control circuit, and to cause a ringer to sound on each of the telephones. Telephone outlets each having a modular 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. However, up to a predetermined number of telephones, by connecting a public telephone line to each of the above-mentioned telephones, the ringer tone of each of the above-mentioned telephones will sound, and without connecting the public telephone line to other telephones, the speaker drive circuit will drive the speaker. In the above invention, a pseudo ring generating circuit is left in place, and a public telephone line is connected to each of the telephones up to a predetermined number of telephones. Since a ringer tone is emitted, and for other telephones, the ringer tone is generated by the pseudo ring tone signal and the ringer tone is generated by the speaker drive signal, there is no limit to the number of telephones that can be connected. , and a simple in-home switching device that does not consume a large amount of power even when a large number of telephones are connected can be provided.

[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. 5 is a block diagram showing another embodiment of the present invention; FIG. 6 is a circuit diagram showing an example of the call control circuit according to the embodiment; FIG. 1 is a block diagram showing a conventional example. 1 - Incoming call detection circuit 2 - Arithmetic processing circuit 3 - Call control circuit 4 - Pseudo ring tone generation circuit 5 - Melody - I
C6 ~ Drive amount sending circuit 7 - Door phone interface 8 - To the door phone --- Speaker drive circuit L+, Lz - Public telephone line TCI ~ TCn - Telephone outlet placement 1 ~ Place n - Telephone SP - Speaker MJ - Modular jack A+, B+ ~A,,,B,-switch CI~C,-switch

Claims (2)

[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. The telephone is equipped with a speaker drive circuit for generating a ring tone, and up to a predetermined number of telephones, a public telephone line can be connected to each of the telephones to generate a ringer tone, and other telephones can be connected to the public telephone line. 1. A simple in-home switching device characterized in that a ring tone is produced from the speaker by a speaker drive signal from a speaker drive circuit without being connected to the speaker. (2) Detects an incoming signal from a public telephone line, receives the detection signal of the incoming signal, and generates a pseudo ringing tone signal equivalent to the ringing tone signal transmitted within the public telephone line using a pseudo ringing tone 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 a speaker drive for driving the speaker and generating a ring tone upon receiving the detection signal of the incoming call signal. A circuit is provided, and up to a predetermined number of telephones, a public telephone line is connected to each of the telephones to generate a ringer tone, and for other telephones, a ringer tone is generated by the pseudo ring tone signal. A simple in-home switching device characterized in that a combination of the above and the sounding of a ring tone based on a speaker drive signal is used.