JPH031864B2 - - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention connects a common entrance machine, a manager's base machine, and a plurality of residential base machines via a telephone line and a calling line, respectively, and sends a called address signal to the calling line. The present invention relates to an intercom device that allows an external call to be made via a telephone line by sending a call and picking up the callee.

This type of intercom device is typically used in housing complexes such as condominiums, and an example of the system configuration is shown in FIG. In the system shown in Fig. 1, the common entrance unit is the main unit M, and a calling bus CB and a talking bus TB are installed in any direction from the main unit M, and each in-house unit installed as a terminal is connected from both buses. Branch wiring the calling line PCL and talking line PTL to T1, T2..., and
The main machine M and the manager's room master machine TO, which is a special terminal, are communicated by a call line QCL and a call line QTL.

Unlike call communication devices, intercom devices are legally prohibited from making calls between residential base units, that is, between one residential base unit and another residential base unit, and there is no provision for such calls. Each base unit is provided with means for preventing the formation of a closed circuit.

FIG. 2 shows an example of the internal configuration of the main engine M. The main machine M includes a CPU 11, an I/O port 12, a memory 13 storing an intercom number, a keyboard 14, a display 15, and a relay 16. The CPU 11, I/O port 12, and memory 13 are each directly connected to the bus 17, and the keyboard 14, display 15, and relay 16 are each connected to a key input interface 18, a display interface 19, and a relay drive interface 20.
It is connected to bus 17 via. A transmission interface 21 is inserted between the I/O port 12 and the call bus line CB or call line CL. There is electrical conductivity between the talking line and the QTL.

Each in-house base unit T is configured as shown in FIG. In other words, each base unit T has a bus 22.
A CPU 23, a key input unit 24, a memory 25, a call generation circuit 26, and an I/O that send and receive signals via the
A board 27 and a relay drive interface 28 are provided. I/O port 27 is connected to control line PCL via transmission interface 29. The output side of the call generation circuit 26 is connected to a speaker 30. As described later, the relay drive interface 28 closes the switch 32 based on a command from the CPU 23 on the condition that the handset 31 is in a hook-down (hereinafter referred to as "HD") state, and inputs the signal of the communication line PTL to the amplifier 33. At the same time, the changeover switch 34 is switched to guide the output of the amplifier 33 to the handset 31. In addition to this receiving system, there is also a communication line from base unit T through a changeover switch, amplifier, and switch.
A transmission system leading to the PTL is also provided, but its illustration is omitted. When the changeover switch 34 is always in the illustrated switching position, a communication circuit with the doorphone is formed, and the doorphone 35 and handset 3 are connected to each other.
1 through an amplifier 36 and a changeover switch 34. Bidirectional communication is also possible here, but only the receiving system is representatively shown in the figure as seen from the base unit side. Normally, the in-house base unit T is also provided with a circuit for making calls similar to the door phone 35 with a sub-base unit provided in another room within the dwelling unit, but this circuit is omitted here. The key input unit 24 is provided with a manager call key, an indoor call key (not shown), etc. that are operated on the main unit T side. For example, when the manager call key is pressed, the CPU 2
reads the manager's address from the memory 25 and sends the address signal to the control line PCL. Also,
When there is a doorbell call from the doorphone 35, a doorphone call signal is input to the key input unit 24 via a signal line (not shown), which is determined by the CPU 23 and sent to the speaker 3 via the ring generation circuit 26.
0 to notify you of a doorbell call.

The administrator base unit TO has almost the same configuration as the residential base unit T, but when there are many residential base units T, a keyboard is used in the same way as the common entrance unit M to specify the address of each dwelling unit. are used.

The above-mentioned device is always in the "door phone call" mode corresponding to the circuit state shown in FIG. 3, and operates as an intercom device within each dwelling unit. In response, from each residential unit T to the manager TO,
Or, when calling from the manager's base unit TO or common entrance unit M to each residential unit, and furthermore from the common entrance unit M to the manager's base unit TO, a dedicated key (inside unit) is used for each call. Press or press 18 on the keyboard
By keying in the address of each dwelling unit or the manager's address using the (common entrance machine or manager's main unit), the address signal representing each address is sent to the call bus line CB, call line PCL, QCL with the help of each CPU. The address is input to each base unit or main unit via the , and its built-in CPU determines whether it is its own address. When it is determined that the own address is being called, a ring tone is emitted through the ring generation circuit 26 and the speaker 30, the switch 32 is closed via the relay drive interface 28, and the changeover switch 34 is switched. to set the circuit state to "external call" mode.
Thus, by hooking up the handset (hereinafter referred to as "HU"), it becomes possible to make two-way calls, that is, outside calls, to and from outside the residence.

The conventional intercom device configured in this manner is always in the doorphone call mode. Even if an outside call is received while using HU to make a doorbell call, the doorbell call will continue, and by ending the doorbell call and going to HD, you can start HU again based on the stored outside call. Enter external call mode. The problem here is that when an external call is made between a base unit in a certain residence and a common entrance unit or a manager base unit, the external call line becomes busy, and an external call by another base unit in the residence is interrupted. This means that it becomes impossible to do so. Even if the HD is incomplete after an external call ends, the call will continue to be in a busy state, and the external call line will remain in a busy state, which will still prevent others from making external calls.

SUMMARY OF THE INVENTION Accordingly, it is an object of the present invention to provide an intercom device equipped with means for regulating external call mode.

In order to achieve this purpose, the present invention starts measuring the call time on the communal entrance device side by sending a pickup signal to the communal entrance device via the calling line at the time of pickup of the called party, and determines the predetermined call time. The present invention is characterized by providing a means for forcibly terminating an external call even when the called party is in a hook-up state by cutting off the call path on the side of the common entrance machine and sending a clear signal to the calling line when the call destination is reached.

The communal entrance machine M shown in FIG. 4 is characterized by being provided with a timer 37 controlled by the CPU 11. This timer 37 is configured, for example, as a one-shot timer, and the external call is
1 is determined and an external communication path is formed, that is, at the time of the call destination HU, and after a certain period of time, for example, 3 minutes, a time-up signal is sent to the CPU 11.
Send to. At that time, even if an external call is in progress, the CPU 11 forcibly cuts off the external call path.
Switch to the internal communication path corresponding to the switching state shown.

Hereinafter, an example of the operation of the apparatus of the present invention will be described in more detail with reference to a flowchart.

FIG. 5 shows a case where the communal entrance machine M calls a certain in-house master unit, for example T1, and makes a call, as seen from the communal entrance machine side. The specific in-house base unit T1 will be expressed as a specific terminal in the figure. First, the user inputs the terminal address of the desired destination using the keyboard 14 in the communal entrance machine M (step 51). This input result is displayed on the display 15 (step 52), so you can check it while performing the operation, and if you make a mistake, you can press the correction key and enter the correct address again. After confirming that the correct address has been input, press the call button provided on the keyboard 14 (step 53).The CPU 11 calls the call line CB based on the address number entered by the key and according to the address stored in advance in the memory 13. A signal is sent (step 54). This call signal is commonly input to each residential base unit (terminal), and each CPU
At step 23, it is determined whether or not it is the own address, and if it is the own address, the switch 32 in the own telephone line PTL is closed and the changeover switch 34 is switched to the telephone line side (step 55). If the received ringing signal is not the own address, the ringing signal acts as a ringing prohibition signal, so that the telephone line cannot be used, that is, both switches 32 and 34 are disabled.
Lock it so that it does not change from the state shown.
Therefore, a ring tone is generated from the speaker 30 in the in-house base unit T1, and based on this, HU is performed (step 56), and a communication state is established between the communal entrance unit M and the base unit T1 ( Step 57).
This HU sends a HU signal to the communal entrance machine M via the calling line PCL and the calling bus CB, and based on this, the timer 37 starts measuring the call time (step 58), and a preset time (e.g. 3
(step 59). It doesn't time out and on the terminal side
The call state continues unless it is set to HD (step 60). However, if the time-out occurs even during a call, or if the time-out occurs but the time-out does not occur, the display on the display 15 is cleared and the external communication path is cut off (steps 59, 60, 61).
A clear signal, that is, a call permission signal is sent via the call bus CL and the call line PCL (step 6).
2) Forcibly switch to the original standby mode, ie internal call mode.

Figure 6 is a flowchart viewed from the terminal (in-home base unit) side. First, reset FF=0 as an initial condition (step 71), and if there is a doorphone call, confirm that FF=0 is reset (step 72,
73), and if there is not, it is determined whether there is a call from the main machine M (step 74). If there is no such call, the process jumps to step 79, and if there is no HU, the process returns to step 72. When there is a call, it is determined whether the call is from the own address (step 75). If it is not the own address, take the above-mentioned call prohibition action (step 76),
Reconfirm the reset of FF=0 (step 77),
If it is the own address, FF is set to 1, and it is determined whether the next terminal HU has been performed (step 79). If HU has not been performed, the process returns to step 72 and the steps described above are repeated. If HU is performed, it is determined whether FF=0 (step 80). If FF=0, it means that a doorphone call path has been established, and a doorphone call is made (step 81).
If there is a call from the main machine M during the call and the call is from the own address, FF is set to 1 (steps 82, 83, 84). If it is not the own address, a call is prohibited (step 85), and FF is reset to 0 (step 8).
6). In either case, if HD is performed (step 87), the original state is returned. If HD is not performed, the doorbell call will continue (Step 8)
7,81). If there is no call from the main engine M in step 82, the process jumps to step 87.

If FF is not 0 in step 80, an external call is made between the main machine M and the terminal (step 88). Here, it is determined whether or not there is a doorbell call (step 89), and if there is no doorphone call, FF = 0.
After resetting (step 90), it is checked whether the main machine has given permission to call, that is, whether the timer on the main machine has timed up (step 91). If no time-up occurs, unless HD is performed (step 9)
2) The process returns to step 88 to continue the conversation. However, if the time is up, or if HD is performed even if the time is not up, the process returns to the initial step 71 (steps 91 and 92).

As described in detail above, according to the present invention, by providing a timer means for limiting the outside call time, it is possible to prevent a specific in-house base unit from occupying the outside call path, thereby creating a highly efficient intercom with a more public nature. equipment can be provided.

[Brief explanation of the drawing]

FIG. 1 is a block diagram showing the overall structure of an intercom device to which the present invention is applied, FIG. 2 is a block diagram showing the internal structure of a common entrance device in the device shown in FIG. 1, and FIG. 3 is a block diagram showing the device shown in FIG. 1. FIG. 4 is a block diagram showing an embodiment of the communal entrance device in the intercom device according to the present invention, and FIG. 5 shows the operation of the communal entrance device in the intercom device according to the present invention. FIG. 6 is a flowchart showing the operation of the in-home base unit in the device. M...Common entrance unit (main unit), TO...Administrator's main unit, T1 to T6, T...Inside unit, CB...Control bus, PCL, QCL...Control line, TB...Talking bus, PTL, QTL...Telephone line.

Claims (1)

[Claims] 1. By connecting the common entrance unit, the manager base unit, and multiple residential base units via a telephone line and a calling line, respectively, and sending a called address signal to the calling line, the called party picks up. In an intercom device that enables external calls via a telephone line, at the time of the call-up, the communal entrance unit starts measuring the call time by sending a hook-up signal to the communal entrance unit via the calling line, and When the call time reaches the call time, the common entrance machine disconnects the call path and sends a clear signal to the calling line.
An intercom device characterized by a means for forcibly terminating an external call even when the called party is in a hold-up state.