DE4013387A1 - Telephone system operation - in which main phone is controlled by central controller and extensions can be added by 4-line - Google Patents

Abstract

Method of operation of a telephone system comprising a main telephone (1) and several connected telephones (2, 3 etc). The main telephone (1) is connected to an externally powered central control unit (RKES) which is coupled to the lines of a telephone network to enable connection to the other telephones via a four line bus. Speech is transmitted over two lines and the other two lines carry control commands and power. A local control unit (RKET) is connected between each telephone and the bus, which communicates with the central control unit (RKES). The speech lines can connect the speech path between a telephone and an exchange or between two telephones. ADVANTAGE - Allows further connection. Also compact and convenient. Telephones may be used in every room, or wherever required.

Description

The invention relates to a method for operating a from a main intercom and several crosstalks represent existing telephone system, the main microphone unit with an external voltage supply central control unit connected to the Line wires of a telephone network is coupled;

So far, it is common to use those from the main intercom and intercoms existing telephone systems to be set up in such a way that the remote feed head of office at a central switching unit he follows. This switching unit is over a two-wire Cable connected to the main unit, which again to each with two-core cables with the individual Subsidiary stations is connected. If with a  existing system the configuration by another Intercom station is to be expanded, so is a relative elaborate wiring from the main station to to the desired installation location of the crosstalk place necessary. When ordering more than one additional sub-stations multiply this installation effort.

This installation effort is not only in commercial facilities complex and undesirable, but especially in private households with a larger one Flat or house grows the need for higher Telephone comfort, which also with a larger number of Telephones is connected. You want to be in can be reached in all rooms and can make calls. So far, this desired comfort has been achieved with a considerable installation effort.

Based on this state of the art Invention based on the object, a method and a circuit arrangement of the generic type  create a with little installation effort easy installation of a variety of extensions equipment.

To solve this problem it is proposed that the Extensions to the central via a 4-wire bus Control unit are coupled, with over two Line transmission is carried out by voice and control over the other two line wires commands and power supply and that between each sub station and bus a decentralized control unit is switched on, that communicates with the central control unit, the two being used for language transmission used wire cores alternately both for galvanic switching of the speech paths between the outside line and one of the microphone units serve as well between two microphone units that are expandable in number and each on the same bus via corresponding de central control units can be connected.  

The central unit controls the decentralized units with the help of a program that does the signaling (Choice information and loop states) the speech evaluate and connect them to the bus works. For this, the signaling of the secondary and the control commands via the bus transfer.

A circuit arrangement for performing the The method is characterized in that a central control unit that has a micro processor includes, the two speaking wires one Ver telephone network via a line adaptation are connected with polarity protection, a power supply unit internal power supply and a telephone are coupled and a 4-wire bus is connected, with two wires for speech transmission and two wires for transmission of the Supply voltage and serve of data, and  that on the bus decentralized control units with micro processors are switched on via a bus adaptation, each with an extension telephone are connected.

It is preferably provided that the tax units are each modular and made up a pre-wired frame part with pluggable Taxes exist.

It is also advantageous that the decentralized tax units a network that can be connected to the power grid Some have internal power supply.

By the inventive method and Circuit arrangement is achieved that a easy installation of additional speech is possible, but not on so-called System telephones according to the prior art must be gripped. According to the invention central and also the decentralized control unit microprocessor controlled, for example  the central control unit up to nine microphone units can operate on a connection. The central tax unit is only needed once per facility, while the decentralized control unit once for each extension telephone to be connected is necessary. The First phone can already be sent to the central tax office unit can be connected, preferably under Ver using the usual plug-in technology (TAE plug).

The wiring of the entire bus is 4-wire, whereby the bus configuration is completely free, so that a Star, ring or tree configuration can be installed can. Depending on the spatial need, the ent speaking structuring can be chosen. About each The control commands and are two wires of the bus transmit the power supply while over the the other two wires are being held can. The central control unit can be connected to the main trunk line or also to a secondary line be turned on. The power supply to the Intercom stations are used during an office  talk from the connecting line, while at in the speech stations via a Power supply. The phones and also the connecting cables can be connected regardless of polarity the control unit can be switched on. In the Installation of the control units can be normal find outlet boxes in which the relative small components of the control unit can. After installing the appropriate Control units is just the additional speech to connect to the respective control unit. It is the use of all in particular Area of the Federal Post Office approved telephones possible. The W wire present in telephones is used for the Function not required. For internal calls a speech path is available. It can alternate can be used for an outside call. It can additionally be provided for internal and external calls be signaled by a different call. Of course it is also possible to replace the Telephone equipment accessories (fax or  same). It is also possible to get one Train the intercom as a door intercom.

The features of the control units are the following:

Election process

The control units are bilingual. they work both in pulse and multi-frequency selection procedure (IWV, MFV). The procedures can also be changed during a call.

Authority

The secondary stations (for example, stations 2 to 9 ) can be switched with half authorization, that is, they can only make internal calls, accept external calls and forward them. They are blocked for outgoing external connections.

Office call assignment

The microphone units at which incoming connections can be signaled can be specified.

Priority for a microphone unit

When connecting z. B. an answering machine can e.g. B. the station 1 are privileged to take over the call from the answering machine at any time.

Number assignment

The assignment of the phone numbers (e.g. numbers 1 to 9 ) to the individual microphone units can be selected individually, for example according to custom. It is programmed at the respective station.

Pick up

An incoming external call can be made by anyone Intercom station authorized by choice a digit can be accepted.  

Outgoing external call from each station

Each authorized intercom station can, at your choice a number, via the connecting line establish an outgoing call.

Call transfer

Call forwarding is done during an outgoing or incoming connection the call station number to whom the call will be forwarded should. There is a special call signals. By lifting the handset you can next announced the call and then through Hang up the handset at the transferring speech put the conversation over. A Special disclosure is that after dialing the number of the conference unit during a Connection of the handset is hung up. The call will signaled at the other station. Will that Conversation within a certain time,  For example, if it is not queried for 45 seconds, it is done a call back at the first station. Within another specific time period, for example another 45 seconds, the call can be taken over will. If there is no call station the conversation over has taken, the connection is made after a certain one Time, for example 90 seconds, triggered.

Inquiry

During an external call, another Call station can be selected to consult and then by dialing a number back into the going back to the original conversation.

Collective call

The collective call is activated if the next one no specific call station can be selected should take over the conversation. Then it will called on all phones at the same time.  

Code call

Ver by assigning different call rhythms divorced persons can pass on or Query addressed to a specific subscriber without knowing which unit he is on is currently located. The corresponding call sounds at all microphone units.

Conference call

An internal call can be made by dialing a code be expanded to a conference call, so that up to three participants at the same time can make calls.

Call waiting

Call waiting is activated without a special procedure. A participant is activated by an attention tone during an internal conversation on an incoming Official call made aware.  

Withdrawal of mediation

By dialing a digit a conversation can continue should be given, withdrawn again.

Further election

By dialing a specific digit, you can use the Call setup with DTMF can be dialed without that the switching device this as a choice knows. This is for example with a telephone Order from mail order companies necessary.

Quiet in front of the phone

This feature is available to a maximum of 8 out of 9 spokes make programmable. The last station he holds a signal when programming. Calm before the phone prevents both internal and external incoming calls are signaled. The caller he holds the ringing tone as with participants who are not present.  

Night shutdown

The night shutdown is similar to the performance feature Quiet in front of the phone, but only locks the external ones Links. A call transfer is still possible.

Internal call forwarding

With this feature, the accessibility improved. Incoming calls are not lost, because during the absence to another Call station can be redirected. At the um will be directed to the call station during this time the calls are not signaled.

All of these features are through appropriate Programming can be saved and called up.

In one possible embodiment, the central control unit be designed so that  with two custom-made cover caps of the cover a usual junction box or the like under can be brought. You can then double be installed so that a standard Installation is possible. The whole in the double Functional insert housed in the frame can electrical components and the TAE junction box for the telephone set. In addition, the power supply to the central control unit fed. The decentralized control unit can do that Have the size of a normal installation box, the Functional use again the corresponding elec trical components includes plug connection.

When operating, the performance features in Settings and dialing processes divided. Under Election processes are outside line, pick-up, return taking mediation, transfer, return question, collective call, code call, conference call and  Understand further selection. They are identified by codes election initiated. The performance is considered a setting Features silence before the phone, night shutdown, before authorization of a microphone unit, internal call forwarding, Outside call assignment, outside line authorization and phone numbers assignment. You are programmed on a call station bar. The procedure is in progress for all programs equalizations. It differs only in the digits to be programmed.

The settings must be switched on and off can be. By using modern storage they remain media even after a network selection receive.

One embodiment is strict in the drawing represented schematically and in more detail below described.  

It shows:

Fig. 1 A circuit arrangement operating according to the inventive method is shown schematically;

Fig. 2 is a central control unit;

Fig. 3 shows a remote control unit;

Fig. 4-6 different bus arrangements.

In Fig. 1, A is the trunk line or a branch line connection of a telephone network. The line wires a / b of line A and also all other connections are connected, for example, to the central control unit RKES via a plug connector. This central control unit is additionally connected to a voltage supply SV, which is connected to the power supply (220 volt alternating current). The bus is connected to the central control unit RKES. In addition, a call station 1 is connected to the central control unit RKES. Decentralized control units RKET are connected to the 4-wire bus, whereby two wires of the bus each take over the voice communication and two wires of the bus supply the voltage and data. Another call station 2 to n is connected to the decentralized control unit RKET via two wires. The basic structure of a central control unit is shown in FIG. 2. G denotes a housing which serves as a carrier and cover for the components of the control unit. In the housing, for example, a microprocessor µP is arranged on a circuit board, which is connected to an internal voltage supply, which is connected to the plug-in power supply unit at SV, which is connected to the bus and is connected to a call station 1 SpSt 1 or one has so-called TAE connection socket. Starting from the trunk line, a line adaptation and signaling is easily seen, starting from the 8 V plug-in power supply, an internal power supply is arranged, starting from the bus, a power supply and signal transmission is provided and starting from the station 1 , a power supply and further signaling are seen before . All function groups are linked to each other and to each other via the microprocessor. The circuit board P comprising the assembly can be plugged into the base frame G.

In FIG. 3, a remote control unit rket is shown. A base frame G is in turn provided with a board P which can be plugged thereon, in turn providing connection options for the 4-wire bus and for a further speech station (SpSt 2 ... n) or into a TAE socket. On the board P, an internal power supply connection point, a bus adapter connection point, a voltage supply and signal processing connection point to the call station 2 to n are provided, which are program-connected to the microprocessor µP. An additional voltage supply SV can optionally be provided.

In FIG. 4 to 6 different bus arrangements are shown, through a bus, the distributed control units rket are connected to the central control unit RKES. A so-called line bus is provided in FIG. 4, while in FIG. 5 there is a star-shaped distribution via an additional distributor V. In FIG. 6, finally, the assembly is provided by two manifolds on the bus, which in turn, each of the manifolds V lacks a bus in the arrangement shown in Fig. 4. If, for example, the bus according to FIG. 4 is to be expanded by a further speech point, then a further connection point for a further decentralized control unit can be tapped at any connection point of a decentralized control unit. It is then only a four-wire line to the corresponding new installation point to be laid from the nearest connection point of the bus, from which it can be seen that an extremely low installation effort is required.

The invention is not limited to the exemplary embodiments limited, but a lot within the scope of the revelation times variable.  

All new, in the description and / or drawing disclosed individual and combination features regarded as essential to the invention.

Claims (5)

1. Procedure for operating one from a main speech station and several secondary stations Telephone system, the main station with one externally powered central control unit ver is tied to the line wires of a telephone network is coupled, characterized in that the extensions via a 4-wire bus to the central control unit are coupled, wherein Voice transmission over two line wires takes place and over the other two line wires Control commands and power supply is performed, and that between every sub station and bus a decentralized control unit is switched on communicates with the central control unit, wherein the two used for language transmission Cable cores alternate to the galvanic through switching the speech paths between the outside line and one of the call stations as well between two  Call stations are used, the number of which is arbitrary are expandable and each on the same bus via ent speaking decentralized control units connected will. 2. The method according to claim 1, characterized in that that the central unit is the decentralized units with the help of a program that controls the Signali sations (election information and loop status) the call station evaluates and their connection on causes the bus, what the signaling of the subsidiary and the control commands via the bus will wear. 3. Circuit arrangement for performing the method according to claim 1 or 2, characterized in that to a central control unit that has a micro processor includes, the two speaking wires one Reverse the polarity of the telephone network via a line adapter are securely connected to a power supply internal power supply and a telephone are coupled and a 4-wire bus is connected, with two wires for speech  transmission and two wires for transmission of Ver supply voltage and data, and that to the Bus decentralized control units with microprocessors are switched on via a bus adaptation, each connected to an extension telephone are. 4. Circuit arrangement according to claim 3, characterized records that the control units are each modular are constructed and from a pre-wired frame partly with plug-in tax inserts. 5. Circuit arrangement according to claim 3 or 4, characterized characterized that the decentralized control units a power supply that can be connected to the mains as have internal power supply.