FI85086B - TRAPPTELEFONSYSTEM. - Google Patents

Description

85086

Porras Telephone system

The invention relates to a stair telephone system, which is defined in more detail in the preamble of claim 1, in particular to be installed in apartment buildings 5. It consists mainly of a combination of a keypad connected to the entrance of an apartment building, a central unit and residential units connected to the central unit in the apartments of the apartment building, whereby an external door opening controlled from the residential unit is connected to the stair telephone system.

Currently available stair telephone systems require their own cabling. A keypad is then placed outside the entrance to the stairwell 15 of the apartment building. Each key leaves the wiring to a specific apartment. The need for stair telephone systems is increasing, especially due to vandalism and other interference. As a result, stair telephone systems are increasingly being installed in old multi-storey buildings that have not been designed with the requirements of stair telephone systems in mind, especially for cabling. Thus, in the old apartment buildings, several penetrations have to be made for cabling, which causes a considerable amount of rework. In addition, cabling often has to be performed at least in part as surface wiring. Due to the structure of the stair telephone system currently in use, the housing unit will have to be permanently installed in a specific location in each of the 30 apartments.

From the above, it should be clear that current stair telephone systems are disadvantageous in several respects. First, due to the difficulty of installing 35 in already built apartment buildings, more than half of the acquisition costs consist of the side costs of installation. The installation work often takes a long time, which makes the installation work inconvenient for apartment building residents. It is clear that 2 85086, even if the work is done carefully, the retrofitted surface wiring will remain visible. In use, the above-mentioned stair telephone system is cumbersome, as the housing unit is always permanently installed 5 more generally next to the door between the apartment and the stairwell. Installing a parallel housing unit is very cumbersome. It should also be noted that the cabling of the stair telephone system cannot be utilized for other uses.

The object of the present invention is to provide, in particular, a stair telephone system to be installed in apartment buildings, by means of which the above-mentioned drawbacks can be eliminated as much as possible and thus the state of the art can be raised. The stair telephone system according to the invention also offers other advantages, since the same system can be used not only for the actual stair telephone system but also for other information transmission.

20

In order to achieve the above objects, the stair telephone system according to the invention is mainly characterized by what is set forth in the characterizing part of claim 1.

25

The invention has several advantages, some of which are listed below: A stair telephone system utilizing an electrical network is very easy and quick to install. The system can in principle be installed without professionals, as the system can in principle be connected directly to the mains sockets.

35 - The dwelling unit can be moved freely inside the apartment building, so it can also be taken outside the dwelling, eg in the laundry room of a housing association, in a sauna, etc.

3 85086

Parallel housing units located in the same dwelling can be connected to the stair telephone system, which is of course an advantage, especially in the larger 5 households.

In addition, additional functions can be connected to the stair telephone system, such as an answering machine, the possibility to leave a message, switching off at night, connecting an alarm for 10 elevator and HVAC equipment, e.g. to a caretaker's residential unit, etc.

The invention is explained in more detail in the following description, in which reference is made to the 15 application examples shown in the accompanying drawings. In the drawings, Fig. 1 shows a schematic overview of a staircase Helin system installed in an apartment building comprising seven apartments, Fig. 2 schematically shows a front view of a stairphone system housing unit, Fig. 3 shows -30 tetta.

Figure 1 shows a schematic diagram of an apartment building incorporating a stair telephone system according to the invention. The apartment building will have a high-voltage mains cable 4 - 35 as a ground cable (either llOVsn or 220V voltage). The network cable 4 has a filter S which prevents the data of the stair telephone system from being transferred outside the block of flats.

4 85086

In connection with the outer door 1 of the stairwell, there is a keypad 2 for the stair telephone system. The keypad 2 has information for each key as to which apartment in question.

5 keys to connect. The keypad 2, each of its keys, communicates with the central processing unit 5 via a low current line 3. Pressing a certain key on the keypad 2 causes a signal to be transmitted to the central processing unit 5 via the low current line 3.

10 Each apartment A ^ ... An (seven pieces in Figure 1) has its own code key, which is formed in the central unit 5 as a result of pressing the key mentioned. The central unit 5 sends said code key to the electrical network 4, whereby the housing unit having the same code key alarms. In connection with the keyboard, there is also a speaker for establishing a voice connection between the housing unit and the user of the keyboard 2.

Each apartment in the apartment building naturally has 20 fuse boards 6 and sockets 7 connected to it. The apartment unit 8 in the apartment is connected to one of the apartment sockets, said housing unit being ready to operate as part of a stair telephone system and always receive signals socket is completed. In Fig. 1, reference numeral 9 further shows the connection cable of the housing unit 8 to the socket 7.

30

When the code key leaves the central unit 5 to the electricity network 4, each housing unit 8 tests whether said code key is the same as the one in question. the housing unit is programmed. If this is the case, the housing unit 8 will sound an alarm and if the line opening key 10 is pressed in the housing unit according to Fig. 2 35, a voice connection will open between the speaker connected to the keypad 2 (Fig. 1) and the housing unit 8 5 85086. The voice connection works so-called. hands-free, eliminating the need for headphones. If, as a result of the above voice connection, the owner of the housing unit 8 wants to allow the interlocutor 5 at the keyboard 2 into the apartment building via the front door 1, he presses the housing unit key 11, the housing unit 8 sending the door (Fig. 1) along the outer door 1 to the electrically operated lock. The voice connection between the housing unit 8 and the keypad 2 can be disconnected with the housing unit disconnection key 13 in Fig. 2. An automatic disconnection 15 is also connected to the stair telephone system.

In the housing unit 8 according to Fig. 2, reference numerals 20 14, 15 and 16 show the indicia of the keys 10, li and 13, and parts 17 and 18 are indicator lights (LEDs), the explanations of which are indicated by reference numerals 19, 20.

Reference numeral 21 denotes a combination of a speaker and a microphone in a housing unit 8.

25

In the following, the operation of the central unit and the housing unit of the stair telephone system will be explained in the block diagram level with particular reference to Figures 3 and 4.

30 1. CENTRAL UNIT 1.1 Transmitter and receiver 1.1.1 Reception 35

The received signal with a frequency of 125 kHz enters the device via the mains cable. The operating voltage transformer 6 85086 is bypassed by capacitors C1, C2 and C3 and the high frequency is separated from the mains voltage by a ferrite ring transformer T1. The signal is passed through a low pass filter to amplifier A5 and a bandpass filter. 5 The amplitude variations of the signal are limited and the signal is fed to a phase locked loop where the FM modulated signal is detected. Amplifier A4 amplifies the PT signal before terminating as amplifier A3. After amplifier A4, a 10 kHz signal is separated by a bandpass filter 8 to control the locking of the outer door.

1.1.2 Transmission

The speaker also acts as a microphone from which the spoken signal 15 is routed to the amplifier AI. The phase-locked loop VCO is controlled by this PT signal and the output of the VCO results in an FM modulated 125 kHz signal. This is confirmed by amplifier A2. A low-pass filter removes harmonics from the signal and conducts the signal thus obtained with a ferrite ring transformer

Teaspoon network. Capacitor Cl bypasses the supply voltage transformer. Capacitors C2 and C3 transmit the signal to the second phases.

25 1.2. Generating an ID key

The eight-bit binary counter receives a clock signal from the VCO. Six bits of the resulting running binary word control the keyboard. The same six bits 30 also go to the input of the six least significant bits of the parallel / serial converter. When a key is pressed, the converter receives an LD signal from the keyboard controller, which loads the six-bit code corresponding to the pressed key into the converter register. The seventh bit can be permanently selected with a separate switch to either state 1 or 0. The eighth bit is set to always be loaded to state 1.

7 85086 1.3. Timing logic and data transmission

At the same time as the converter receives the LD signal, the timing logic receives the start signal. In this case, after a short delay of 5 (approx. 1 ms), the logic sets the connection and reset signal. The binary counter resets and the transmitter sends a signal to the mains, which the receivers interpret as a logic zero (the receivers reset). The RESET signal lasts for a few seconds. 10 After a reset, data is sent. The data is transmitted the most significant bit above, so always the first bit to be transmitted is a logical one. When the data leaves the register, the bits are loaded in the corresponding order to state 1, which is sent after the data is output 15 for the time when the signaling data of the timing logic is high. The data signal opens the housing unit with the code corresponding to the data.

After the data, a paging signal is sent, which is heard in the 20 open housing units. After this, the connection is on as long as you are online. The connection signal to the timing logic indicates whether there is traffic on the network. If the traffic slows down, the connection is lost after the set time, eg after approx. 10 seconds, and the device 25 returns to the initial state.

1.4. traffic Logic

The signals coming to the traffic logic are speech, 30 traffic and connection. The output signals are transmission reception and mute. The outputs depend on the inputs as follows.

Sent. = Transport and communication and speech - 35 = Speech

Mute = Transport and communication and speech 8 85086 2. HOUSING UNIT 2.1. Transmission and reception 5 In the housing unit, transmission and reception are identical to the functions of the central unit.

2.1. Identification of the identification key 10 In sleep mode, the housing unit continuously listens to the network. When the central unit sends a RESET signal, it is routed to the receiver's RESET indication. When the signal is down long enough, the receiver's binary counter and serial / parallel converter reset. The above-mentioned circuits remain in the RESET state until the central unit starts transmitting data. The first bit in the data, which is always a logical one, clears the RESET. Data is received until the the first bit is moved from the converter to the most 20 significant bits in place. This causes the clock to be blocked and at the same time the comparator is allowed to transfer the comparison result to the output. If the received data is the same as the one set with the code switches, the control logic receives a signal from this.

25 2.3. The control logic

When the reference signal is true, pressing the ON switch (open key 10, Fig. 2) sets the connection signal. Pressing the 30 OFF switch (close key 13, Fig. 2) resets the device.

2.4. Traffic logic 35 The signals entering the logic are otherwise the same as on the control panel, but the signal COMPARISON has been added.

9 85086 Outputs depend on income as follows Send. = traffic and connection and speech

Equiv. = speech 5 Mute = comparison and connection and speech 2.5. Opening a door

When the connection is active and the release switch 10 is pressed, the apartment unit sends an 8 kHz signal to the network, which causes the relay to pull the relay.

Claims (3)

A stair telephone system, in particular for multi-storey buildings or similar buildings, comprising: a keypad (2) or a similar, block of flats or similar building, preferably in connection with its front door, a plurality of at least one housing unit (8) or the like 15. each cabling or similar wiring between the keypad (2) or the like and the contact points or the like, the means of the keypad (2) or the like and each dwelling unit ( ) or the like to provide information, in particular a voice connection, between the user of the keypad (2) and the contact selected by the keypad (2) or the like and means for locking the exterior door of a floor-25 house or similar building in each housing unit (8), or stair telephone system 30 further comprising: a central processing unit (5) comprising means for generating an identification code key 35 identifiable by access points to said central processing unit (5); to receive a signal corresponding to the identification key of the contact object and other information 5 having means for transmitting the identification code key belonging to the housing unit associated with the contact object to the high-voltage network of the floor-house or similar building; or a corresponding user and between a housing unit (8) or the like located at the access point provided with the identification code key 15, a housing unit (8) or the like detachably connected to the high-voltage network 20 and having means for generating and reading the identification code key specific to the housing unit. A stair telephone system according to claim 1, characterized in that a filter (S) is arranged in the high-voltage network to prevent information transmitted in the stair telephone system from entering the outside of an apartment building or similar building along the high-current network. A stair telephone system according to claim 1, characterized in that the housing unit (8) or the like comprises an electrical plug from which the housing unit (8) or the like can be connected to a mains socket. i2 8 50 86