DE3149412A1 - Circuit arrangement for setting up charge-free calls for the calling subscriber - Google Patents

Abstract

The facility for setting up charge-free calls for the calling subscriber to predefined subscriber connections in a telephone switching system, it being the case that translation into the telephone number of the allocated subscriber connection is effected by dialling a special service number and a subsequently dialled number identifying the predefined subscriber connections and that, following the successful through-connection of the call, charges are recorded and debited in each case to the predefined called subscriber connection, is comprised in that a telephone PABX system connected to the local exchange concerned is reached by dialling the special service number, in which PABX system the conversion also takes place and which also takes over the further call set-up to the predefined called subscriber connection. With the aid of announcement devices, operator positions and subscriber connections on the telephone PABX system, the calling subscriber obtains appropriate support which may comprise the transfer of announcement texts or information or the input of the telephone number by the operator position. If the call set-up initiated by the telephone PABX system to the predefined called subscriber does not reach the destination, the calling subscriber is automatically connected to an operator position or a predefined subscriber connection, the owner of the latter connection being identical to those of the predefined called subscriber connection. <IMAGE>

Description

Circuit arrangement for the production of for the calling party

Subscriber toll-free connections The invention relates to a circuit arrangement for establishing connections to predetermined subscriber lines, which will the calling subscriber reduced or free of charge 0win a hierarchically structured telephone exchange system formed from switching systems with continuous connection establishment, whereby by dialing a special service number and a subsequent number that characterizes the specified subscriber connections is converted into the call number of the assigned subscriber connection and after the connection has been switched through each time at the expense of the given routed Tellnenmeransclilusses tent-related fee recording is made.

Such a circuit arrangement is already known. This is how in DE-AS 27 37 811 a circuit arrangement for free of charge for the calling subscriber Push connection establishment in telephone systems, in which one in the upstream central exchange arranged and via the assigned special service number Additional device to be selected directly free of charge is provided in which the revaluation of the number and the recording of charges are carried out. With help the converted phone number is then automatically set up a connection the relevant subscriber line caused by the additional device.

The specified subscriber lines are such from service companies, travel agencies, mail order companies, etc., which with the possibility The toll free calls give their customers an easy way to establish business relationships want to offer.

The object of the invention is now to provide a circuit arrangement indicate which of the telecommunications administration is introducing such a service made possible in an economical way.

According to the invention, this object is achieved in that at a local exchange a telephone exchange incoming with the dialing of the special service number accessible outputs and outgoing is connected to the inputs that by appropriate Measures for an incoming connection to the telephone exchange this is treated free of charge in the local exchange and that on the telephone exchange, which characterize the conversion of the subsequently selected, the specified subscriber connections Number in the phone number of the connected subscriber line, Subscribers9, announcement devices, operator stations, etc. are connected, which can be connected to incoming connections as required. Through the announcement devices can send standard announcements to the calling subscriber for the simplest assistance will.

Further support is possible via the operator stations, which in further information, in the transfer of the connection to a subscriber line or also in the initiation of a connection establishment to the specified (remote) Subscriber connection can exist. The subscriber lines of the telephone exchange can refer to the local branch of the owner of the specified (remote) Be assigned to the subscriber line.

The use of a telephone exchange to convert the Call number, which is looped into the relevant connection, is already has been proposed (P 31 23 615.4). Here is the telephone exchange however i arranged central switching area, with the connection as a through connection is treated. Connections to subscriber lines are not provided.

A further development of the invention is that in the telephone exchange an incoming busy line transmission initially with an announcement device is connected. After dialing the special service number, the subscriber initially receives an announcement that informs him of the further steps to be taken.

A further development of the invention also consists in the fact that in the cases in which the connection establishment to the specified subscriber line does not reach the goal leads or this is busy, the connection in the telephone exchange is thrown onto the operator station. The operator station can now use the Find out what connection you want and either initiate a new connection or the calling party with a subscriber line of the telephone exchange associate.

A further development of the invention also consists in the fact that in the cases in which the connection establishment to the specified subscriber line does not reach the goal leads or this is busy, the connection in the telephone exchange is recoupled to a predetermined subscriber line of the same. Dependent on the calling subscriber will use the selected number to be converted Case connected to a subscriber line of the telephone exchange, which is assigned to the owner of the specified (remote) subscriber line. Here for example, it can be the local office of the remote subscriber Act.

A further development of the invention is that in a outgoing connection, which is via the input switching stage of the local exchange runs, the incoming charge impulses summed up and in one of the relevant Storage space assigned to the phone number. The phone number is it is the phone number of the specified (remote) subscriber line, which is determined in the telephone exchange by the conversion. Through the Recording the incoming charge impulses is not only a time, but also time and zone-dependent fee recording is possible.

A further development of the invention also consists in the fact that the call number-individual Storage locations are arranged in a memory of the telephone exchange, the content of which can be called up by a higher-level body. At the parent Position can be, for example, an already existing operating computer, which already for this purpose with centrally controlled local exchanges is used. In this way, there is a partially centralized or centralized recording of the fees possible, since the specified (remote) subscriber line is available from a large number can be reached from local exchanges.

A further development of the invention is that the telephone exchange is a private branch exchange, which over line transmissions with the Local switching steal is connected. As a telephone exchange can a conventional private branch exchange are used, with its control device only the new features such as conversion of the phone number, through traffic must be adjusted via the trunk lines, etc. Further changes are not necessary as a telephone exchange for connection to a local network anyway is provided.

Further advantages result from the subclaims.

The invention is explained in more detail using an exemplary embodiment, which is shown in the drawing.

The local exchange OV consists of a switching stage AS and several elective levels, of which the group elective levels 1.GW, 2.GW and 3.GW are shown will. The remote level yx is reached via the height step 0 of the option level 1.GW. A large number of subscriber stations, one of which is shown as a subscriber station TA are connected to the AS switching stage. More details about the structure a local exchange, for example, the book by Krause, local offices, dialing, Verlag Erich Herzog, Goslar, 1958, so that in the context of this description will not be discussed further.

In the local exchange OV there is a facility OZ, which is connected to the entrance of elective level 1.GW. This facility serves for feeding in charge impulses for a time-dependent counting of local calls. The private branch exchange F is a switching system with a programmable controller, as for example in the magazine TN - Nachrichten 1978, issue 79, on the Pages 8-14. A variety of subscriber stations T are over in each case an individual subscriber connection circuit TS with a coupling field KF tied together. Announcement devices AS, one or more operator stations are also available PL and several dialing records WS connected to the switching network KF. Traffic # between the local exchange OV and the private branch exchange F is handled via the cable sets UEk and UEg, with the cable sets via Connecting lines are connected to the line sets DW, which in turn are connected to the input of switching stage AS or to the output of optional stage 3.GW.

The subscriber line circuits TS, the announcement devices AS, the space controls PS, the elective acceptance sets WS and the line sets UE are with a common Control device ST connected, which the connected Einrichzungen processes incoming messages and issues corresponding commands to them. The switching network is also controlled by the common control device KF, which has a large number of crosspoints for connecting the individual facilities having with each other.

It is now assumed that the subscriber station TA one free connection for the calling subscriber to a specified (remote) Subscriber connection TB is to be set up, the subscriber station TB being connected to a is connected via the remote level attainable local exchange, which is shown symbolically by the last option level LW.

Hand After unhooking the / device at the subscriber station TA the subscriber is prompted by the dialing character to enter the dialing information. It is assumed that in order to obtain the service one for the calling party Subscribers initiated the toll-free connection by dialing the special service number 130 will. A corresponding setting is made by entering this special service number of the elective levels 1.GW, 2.GW and 3.GW, whereby the line transmission DW is achieved. This also has the assignment of the line transmission Uek connected to this the private branch exchange F result. The assignment of the same is sent to the common control device ST reported, which thereupon the switching network KF to Connection of the relevant line transmission Uek with a free announcement device AS initiates. The subscriber station TA receives an announcement text through the announcement device AS transmitted, which says that the subscriber then the desired Enter the number identifying the subscriber line. This number is well known not identical to the actual call number of the relevant connection TB. The announcement device can also inform the subscriber if he does not know the number in question by entering a specific number to initiate a connection to an operator station.

First of all, it is assumed that the calling part number, die.Rúfnummer .. = taker; under which the subscriber station Tb can be reached is known. At the end of the announcement, a corresponding signal is transmitted from the Announcement device AS to the control device ST, whereupon this prompts the Ko ¢ ifeld KF, to disconnect the connection and instead of the announcement device a free dialing record WS to connect with the line transmission Uek. The subscriber station TA inputted election information is received by the election record WS and sent to the shared control device ST passed. In the common control device ST a revaluation of the entered number takes place in the with the relevant Number of a memory location is controlled in a memory, not shown, - which contains the area code and the actual phone number of the specified subscriber. In this case the phone number of TB. This is then done by the common control device TS the assignment of a free line transmission Ueg, which over the connecting line and the wiring harness DW stimulates the switching stage AS. Then the transmission takes place the area code and then the number of the desired subscriber which causes a corresponding connection to the subscriber line TB will. If the sending of the election information is finished, the common one initiates Control device ST the coupling field KF the two line transmissions Uek and Ueg to connect with each other.

Just like the electoral acceptance through a special electoral reception facility WS takes place, the election information can also be sent out by a special facility which is connected to the line transmission Ueg for this purpose.

However, it is also conceivable that such a device is not required and instead the inclusion of the electoral information is already in the line transmission Uek / * takes place. Was not from the subscriber station TA the number of the desired subscriber but the number of the operator - / * and the Transmission through the line transmission Ueg ' entered place, this takes place on the basis of the evaluation of the number by the common control device the connection of the line transmission Uek with an operator station PL. The operator station can now give the calling subscriber the desired information or also in turn initiate a connection to the subscriber line TB.

The operator station PL can either nin the relevant number of the subscriber line Enter TB, whereupon this in the manner already described in the common control device ST is converted 5 or the connection with a free line transmission Ueg request, with the entry of the area code and the phone number of the subscriber line TB is carried out by the operator station, d. H. conversion is no longer necessary. To When the dialing information has been sent, the operator station disconnects and causes the common control device ST to switch the switching network KF in question Line transmission Uek and the line transmission Ueg to connect with each other.

Since an outgoing connection of the private branch exchange F in the local exchange OV is treated like a normal outgoing call, also come from a remote dialing device, not shown, time-dependent and zone-dependent Ge -..., on ~ ~~~~ buhrenimpulse / 9-which via the WegWahlsture 1.GW switching stage AS line set DW get into line transmission Ueg. These charge impulses are usually transmitted at 16 kHz. Every incoming fee is stimulated recorded by the line transmission Ueg and sent to the common control device ST passed on, where they are summed up and stored in a memory SP. For this purpose, the memory SP has a multiplicity of memory locations, with each memory location is assigned to a predetermined subscriber line.

The addressing of such a memory location can now either under the number or also under the telephone number of the subscriber connection concerned take place. In the main memory, not shown, of the common control device ST is the number dialed by the subscriber and also the converted phone number in one Storage area stored, which of the line transmission concerned Ueg is assigned. With this information, the relevant storage space is in the. Memory SP can be found at any time.

So far it has been assumed that the specified partial .TB subscriber connection / to a local exchange is connected, which can be reached via the remote level is.

However, it is also conceivable that this predetermined subscriber line is connected to the same local exchange OV. In this case not applicable the area code when converting. The charge impulses, in this case from the device OZ are sent out in the manner already described Line transmission Ueg and transmitted by the common control device ST processed in the same way.

If the case now arises that after the transmission of the received area code and phone number of the desired subscriber cannot be reached is because the connection path or the subscriber is already busy, so will due to the busy signal arriving in the line transmission Ueg, which received by a corresponding device and sent to the common control device ST is reported, the connection path in question from the line transmission Ueg triggered and the line transmission Uek with a subscriber station T of the private branch exchange connected at the instigation of the control device ST.

This subscriber station T is, for example, the Local representation of the subscriber line owner of the subscriber line TB. Of the calling subscriber can now communicate his wishes to subscriber line T. There no charge pulses are generated for this connection is a corresponding one Replication of these charges impulses within the common control device ST conceivable, which are summed up in the manner already described.

Since the private branch exchange F as well as the local exchange OV is operated by the telecommunications management, is an internal traffic between subscriber stations T within the private branch exchange V for the telecommunication administration not of interest, since fee recording is not easily possible. In contrast the private branch exchange points to a conventional telephone private branch exchange F therefore does not have any internal connection kits.

Outgoing calls to the local exchange OV can, however, be permitted be, since a line transmission Ueg is required for this purpose, which the Receives incoming charge pulses and to the common control device ST passes on. To prevent abuse, however, this traffic can be used on calls are limited to the given subscriber line, its subscriber is identical to that of the subscriber station T concerned. To this end the handset at the subscriber station T is either only in the idle state lift off, whereupon the relevant subscriber line through the common control device ST is identified and the further connection establishment in the already described Way with the determined area code and the phone numbers of the specified subscriber line is carried out at the instigation of the common control device ST. To this The purpose is to expand the memory area already described, not shown, by not only the number, the area code and the phone number but also in the same in addition, the address of the associated subscriber line T1 is also entered will. Another possibility can be that the subscriber station T one Has selector with which the number for the subsequent conversion must be entered. The further connection is established in the manner already described Way.

Carries out a connection setup controlled by the private branch exchange system F. to a given subscriber line is not successful because the connection device or the connection itself is busy, then instead of a connection to an operator station or to a subscriber connection of the telephone private branch exchange also a connection to another subscriber line of the public telephone network getting produced. For this purpose, the one already described and no further memory area shown by another memory location for storing the call number to expand this subscriber line, which can be selected alternatively when busy is. The recording and further processing of the fees incurred is already carried out described way.

Should the connection be established after dialing the specified special service number will be free of charge for the calling party through the broadcast transmission Uek prevents the counting voltage from being applied to a wire in the connection line, this has the consequence that the transmission of charge pulses by the device OZ to the calling subscriber is omitted. Otherwise, the calling party will charged with fees that are in any case lower than with a direct connection to the specified subscriber line. Is the private branch exchange F in the local network reachable, the calling subscriber only receives the charges for a local call charged.

The looping in of the private branch exchange system can increase result in attenuation of the speech path.

To compensate for the loss of attenuation, one of the two is in the speech path lying extension transmission (Ueg, Uek) with a corresponding amplification device to provide.

Claims (10)

Circuit arrangement for the production of for the calling party Toll-free connections P a t e n t a n s p r ü c h e: 1. Circuit arrangement for the establishment of connections to predetermined subscriber lines, which for The sooting participants are excessive or free of charge, in a hierarchically structured Q from switching systems with a telephone switching system that keeps pace with the establishment of a connection, whereby by dialing a special service number and a post-elected, the specified Number identifying subscriber connections into the call number of the assigned subscriber connection is converted and after the connection has been switched through Loads of the specified called subscriber a connection time-dependent billing is made daduch marked that to a local exchange (OV) one Telephone exchange (F) arriving with the by dialing the special service number accessible outputs (GW) and outgoing is connected to the inputs (AS, SW), that by taking appropriate measures for an incoming connection to the telephone exchange (F) this is handled free of charge in the local exchange (OV) and that on the telephone exchange (p), which is responsible for the conversion of the post-dialed, the specified subscriber connections identifying number in the phone number of the assigned Subscriber connection carries out, substations subscriber tT) announcement devices (AS), attendant consoles (PL) etc. are connected, which if necessary with incoming Connections are connectable. 2. Circuit arrangement according to claim 1, characterized in that an incoming line transmission (Uek) in the telephone exchange is first connected to an announcement device (AS). 3. Circuit arrangement according to claim 1, characterized in that in those cases in which the connection to the specified subscriber line is being established does not lead to the destination or if the destination is busy, the connection in the telephone exchange (F) is dropped onto an operator station (PL). 4. Circuit arrangement according to claim 1, characterized in that in those cases in which the connection to the specified subscriber line is being established does not lead to the destination or if the destination is busy, the connection in the telephone exchange (F) is recoupled to a predetermined subscriber line of the same. 5. Circuit arrangement according to claim 1, characterized in that in the case of an outgoing connection via the input switching stage (AS) of the local exchange (OV) runs, the incoming charge impulses summed up and in one of the relevant Storage space assigned to the phone number. 6. Circuit arrangement according to claim 5, characterized in that the individual call number storage locations in a memory (SP) of the telephone exchange (F) are arranged, the content of which can be called up by a superordinate body. 7. Circuit arrangement according to one of claims 1 to 6, characterized 9 that within the telephone exchange (F) the subscriber lines only incoming and cannot initiate any external connections. 8. Circuit arrangement according to one of claims 1 to 4, characterized in that that in those cases in which the connection to the specified subscriber line does not lead to the goal or it is busy from the telephone exchange a connection to a predetermined subscriber line of the local exchange (OV) or the rest of the telephone exchange system is initiated and the calling party Subscriber is then connected to this connection 9. Circuit arrangement according to one of claims 1 to 8, characterized in that a subscriber station (T) of the telephone exchange (F) to the subscriber of a given subscriber line is assigned and an outgoing connection is only possible to this. 10. Circuit arrangement according to one of claims 1 to 9, characterized marked that the telephone exchange (F) is a private branch exchange which is connected to the local exchange (OV) via line sets (LS) is.