JPS6065652A - Interphone set - Google Patents

Abstract

PURPOSE:To decrease the number of lines and to attain the effective use of lines by using a talking line in common with a line for emergency broadcast when one interphone line is used, and using one for talking line and the other for emergency broadcast and service broadcast when two lines are used. CONSTITUTION:When an external line is only T1, switches SWa, SWc are closed, a signal from a microphone M is transmitted to the line T1 via n amplifier BA and the SWa, and a signal from the T1 is received by a receiver YP via the SWa, SWc, the amplifier BA and a hook switch FS, Furthermore, a point (t) of the SWb is connected to the line T1, the SWb is closed to apply the emergency broadcast to a speaker SP via the amplifier BA and a power amplifier PA. When two external lines T1, T2 are used, the SWa, SWc are closed and the line T1 is used for talking. Moreover, the line T2 is used, the SWb is closed and signals of emergency and service broadcast are applied to the speaker SP. In receiving the service broadcast by the receiver YP, an SWf is closed.

Description

DETAILED DESCRIPTION OF THE INVENTION (Field of the Invention) The present invention relates to an interbon device particularly suitable for use in housing complexes such as condominiums, dormitories, and apartments.

(Background of the Invention) In a housing complex such as a condominium, one or two external communication lines (interbon lines) are provided for communication between each dwelling unit (or room) and the common entrance or the manager. As an example of such an intercom system, FIG. 1 shows a connection diagram of an apartment building management device. In the figure, MC is a central control device as the main device installed in the manager's room, and this central control device MC is connected to each pair of external communication lines (voice lines) T and transmission (calling signal) including a grounding line. line"
The home controller HC (Hc1HC2,...
, l-1cn) are connected in a multi-drop manner.

This housing complex management device has a function as an intercom system, and the manager etc. can call the home control [Coke 1-IC] of any dwelling unit via the transmission line from the central control device MC. It is possible to make calls via the line, and the home controller of each dwelling unit l-I
It is also possible to call the central control unit MC from C and make a telephone conversation. A similar intercom system will also be installed between each dwelling unit and the common entrance, if necessary.

By the way, in such an apartment complex, a broadcasting line separate from the intercom line is provided for emergency broadcasting and service broadcasting, which has the disadvantage of increasing the number of wiring lines.

In order to avoid such an increase in wiring, we have created an intercom device that uses existing intercom lines to make emergency broadcasts and service broadcasts to save wires, and that can be used for either one or two lines. The configuration shown in FIG. 2 (zt) has been proposed. In the same figure, TI
, T2 is the external call line (or connection terminal), SW
(SWa, SWb.

...SWa) is an electronic switch, BA is a buffer amplifier, PA is a power amplifier, M is a microphone (telephone), YP
is a telephone receiver, FS is a hook switch, and SP is a speaker. The electronic switch SW is controlled as shown in Table 1 by a control circuit (not shown) that responds to control signals transmitted via a communication line or transmission line (not shown) and the state of the hook switch FS. Same table and second
In the figure, a to Q are the outputs of the above control circuit, and the electronic switch SW is turned on (closed) when these outputs are T1.
When it is L, it turns off (circuit). In addition, in the case of a platform with only one communication line, only outputs a, b, and c are effective.

Table 1 a b c d' e f g External call (TI) 1-ILHLLL (T2) L L HHL LL Service (address) LLLLHHL (hand) L L L l, HL HΔNS 1~ILLLL+- Like this The device shown in Fig. 2 allows calls on line T1, emergency broadcast (ANS) on line T1, calls on line T2, and calls on line T2 by opening and closing the electronic switches sw.
NIJζru service broadcast (sound reinforcement and handset reception)
It is possible to realize various modes such as By the way, in this interbon device, even when two lines are used, line T1 is used for calls and emergency broadcasting, so when an emergency broadcast is made, the call on the lower line 1 side is 'aIJl'. There is an inconvenience that you may be attacked. In other words, since lines T1 and D2 are generally separated for calls by the manager and the common entrance, for example, calls made using line T1 cannot be made via line T2 even if line T2 is free. , there is an inconvenience that the line cannot be used effectively.

(Object of the Invention) The present invention provides an intercom circuit having one or two external communication lines, in which when there are two external communication lines, the first line is used for communication and the second line is used for emergency broadcasts and service broadcasts. , in the case of one, use that line for calls and emergency broadcasts,
The concept is that emergency broadcasts can be received with amplified sound, and service broadcasts can be received with amplified sound and a handset, and the control circuit that switches between these call modes will perform the same operation regardless of whether there are 1 or 2 external lines. Based on this, we have developed an intercom device that makes effective use of external call lines, reduces the total number of lines, and standardizes the circuit by sharing the control circuit and control flow whether there is one or two external call lines. The purpose is to provide.

(Explanation of Examples) This will be explained below using the drawings.

Note that parts common or corresponding to those of the apparatus shown in FIG. 2 are denoted by the same reference numerals.

FIG. 3 shows the configuration of an interbon device according to one embodiment of the present invention. As shown in Table 2, in the equipment shown in Figure 2, the telephone line T1 is used for both telephone calls and emergency broadcasting (ANS), regardless of whether there is one external telephone line or two external telephone lines. In the device shown in Fig. 3, if there is one external communication line, this line T1 is used for both calls and emergency broadcasting, but if there are two lines, the communication line T1 is used exclusively for calls and the communication line T2 is used for both calls and emergency broadcasting. It is used for emergency broadcasts and service broadcasts.

Table 2 Device shown in Figure 2 In the case of one line of the present invention T1: Call, ANS call, In the case of AN32 line T1; Call, ANS call Bottom 2: Call, service To NS, Service Table 3 bc f External call (" rl) HL l-I LAN5 L H
L L Service (Amplitude) Ll-ILL Service (Hand > LLLH Table 3 shows the control outputs of the control circuit (not shown) of the intercom device shown in FIG. The control circuit for controlling each mode in Table 3 can be constructed using a well-known method using, for example, a microprocessor.

FIG. 4 shows the connections when the intercom device of FIG. 3 is used with one external communication line, and Table 4 shows the control circuit output in this case.

Table 4 bcf External call (TI) l-I L H- ANS LHL- In this case, connect the terminal t of the electronic switch SWb that was connected to the line T2 in FIG. 3 to the line T1,
Electronic switch SWf is removed. Such circuit changes may be made by connecting the terminal t of the electronic switch SWb and the connection terminal lower 1 or T2 with a jumper wire, jumper bin, or It is sufficient to use a mechanical switch for switching, and to leave the electronic switch SWf idle.

(Effects of the Invention) As described above, according to the present invention, since the intercom line for telephone calls is also used for emergency broadcasting, line saving can be achieved, and when there are two intercom lines, one line Since one line is dedicated to calls, and the other line is used for emergency broadcasts and service broadcasts, calls can be made even during emergency broadcasts, and the line can be used effectively. Furthermore, since a common control circuit and control flow are used in the case of one intercom line and the case of two intercom lines, it is possible to contribute to circuit standardization.

[Brief explanation of drawings]

Fig. 1 is a connection diagram of an apartment building management device to which the intercom device of the present invention is applied, Fig. 2 is a block diagram of a conventional intercom device that can share emergency broadcasts with one line and two lines, and Fig. 3 is a diagram of the present invention. FIG. 4 is a block diagram of an intercom device to which the present invention is applied for one line. HC...Home controller (intercom split) T
, T1. T2: Telephone line, 5Wa-8W (1: Electronic switch, SP: Loudspeaker, M: Transmitter, YP: Receiver. Patent applicant: Toshiba Denzai Co., Ltd. Agent, Patent attorney Person Patent Attorney Tetsuya Ito Figure 1 HCI HC3 Figure 2 Figure 3 Figure 4

Claims (1)

[Claims] 1. First and second connection terminals to which two external communication lines are connected, a transmitting circuit and a receiving circuit for handset communication, a loudspeaker circuit, and outputs of the first connecting terminal and the transmitting circuit. a second switch having one end connected to the input end of the loudspeaker circuit and the other end being switchable and connectable to the first or second connection terminal;
A third switch inserted between the output end of the transmitter circuit and the input end of the receiver circuit, and a fourth switch connected between the input end of the receiver circuit and the second connection terminal. If there is only one external line, connect this line to the first connection terminal, connect the transmitting circuit and receiving circuit to the line during a call, and connect the above external line to the above line in case of an emergency. If the line is connected to the above-mentioned loudspeaker circuit, and there are two external lines, when making a call, connect the above-mentioned transmitting circuit and receiving circuit to the first line, and in case of an emergency, connect the second line to the above-mentioned loudspeaker circuit. and when the service broadcast section loudspeaker output is selected, the second line and the loudspeaker circuit are connected, and when the handset reception is selected, the second line and the reception circuit are connected. An intercom device featuring: