FI64031B - DATAMASKINSTYRT REGISTER FOER AUTOMATIC TELEFONSTATIONER - Google Patents

Description

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Ruotsi-Sweden (SE) 7311U72Q

(71) 0 / Y L M Ericsson A / B, 02U20 Jorvas, Suomi-Finland (FI) (72) Rolf Ericsson, Tullinge, Arthur Lars Erik Lindblom, Äkersberga,

Per-Arae Mannby, Huddinge, Ruotsi-Sweden (SE) (7U) Oy Kolster Ab (5M Computerized Register for Automatic Telephone Stations -Tietokoneohjattu rekisteri automaattisia puhelinasemia varten) The present invention relates to a computerized register for automatic telephone stations with at least one subscriber selector step and at least one group selector step with each marker each normally comprising an actuator portion and an analysis portion, and a plurality of dialing connections connected to digit reception of the type at which the called subscriber's number in the form of digit signals is received by one of the registers, stored and analyzed The invention primarily finds use in automatic coordinate-type telephones and can be incorporated as part of a new telephone station or used to modernize it, possibly after conversion, to the respective markers. one already found near station.

Modern telephone exchange systems require a great deal of flexibility in terms of the possibility of introducing new services for the subscribers, and simple methods for adapting to varying traffic needs and partly the ability to rationalize the operation and maintenance operations. Through the introduction of computer technology, completely new systems have been created that meet these requirements, but due to the large investments it entails replacing existing systems, the new systems can only be introduced when it is necessary to dispose of existing ones for other reasons. Such a reason may be unsatisfactory function or the need to increase traffic capacity.

This slow rate of reimbursement leads to the major disadvantage that the telephone network receives an uneven structure from a technical point of view, which partly means that not all subscribers can be offered the same service and partly that many of the operational benefits cannot be fully utilized.

SE Expand Publication 318 621 only refers to an existing station, where it is desired to introduce new services, that this is done by processing these additional functions in a built-in unit, e.g. a data processing device, which has been introduced into already existing connection paths. In this case, it is therefore not a matter of replacing entire function blocks with a centralized processing device, where all of the analysis functions, which are normally handled by markers and registers, are combined into one unit. In order to enable this, the present invention strives for the markers, which are normally divided into an analysis part and an operating part, in order that the first-mentioned whole can be eliminated and the operating part can be connected to the register device as well as the subscriber step markers and the group selector marker. The Swedish publication deviates from this in that the existing marker can independently carry out complete analysis of the normal connections and that it is not in any way implied when the data processing device is switched on, that the marker is to be relieved from the normal work or new analysis functions should be provided in a simple way. Thus, according to SE Expand Publication 318 621, a data processing device is inserted as an intermediary in the previous information paths between existing registers and markers to perform the analysis functions conditioned by the new subscriber services, while the markers handle the analysis functions for the ordinary services.

However, a prerequisite for the implementation of the new services is the introduction of special connection circuits, which operate over specific bodies in connection with the data processing device, and which are used at the present time. The data processing device thus has a dual function as a complement to the existing markers and complements to new connection circuits, but has no part in the register function.

U.S. Patent 3,555,196 discloses a built-in data processing device whose purpose is to assist existing markers in calls from particular category subscribers, but does not contain any suggestions for simplifying the markers. The patent thus deals with a plant where the data processing device can be used as an auxiliary device and used to perform current specialized services, and the described device should in principle only be regarded as part of the marker.

The object of the invention is to provide a solution to this problem by introducing a computer controlled register device which can be built into already existing telephone stations, whereby they obtain a technical level comparable to new computer controlled stations and which also have such technical and economic qualities that this way the system created is also favorable for new production. This is achieved by forming a number of interfaces which enable communication in an optimal way between one side of conventional electromechanical design, such as markers and lines, and on the other a computer system comprising control logic and memories, whereby certain functions such as number analysis and viaval are transferred to the computer system. Because all data about subscribers and traffic conditions can be stored in the data memory in such a way, it is extremely easy to make changes to this data. Numerical analysis and viaval can also be executed faster than in the conventional system, which is why the station's traffic felling capacity is increased.

The features of the invention are set forth in the claim.

The invention will be explained with reference to the accompanying drawing, which shows an example of an automatic telephone station equipped with a register device, REG, according to the invention, but otherwise constructed of electromechanical components of the type used in Telefonaktiebolaget LM Ericsson's system ARF 10. Similarly, the subscriber's telephone apparatus TF is connected to a line equipment LR belonging to a subscriber selector step SL which comprises four sub-stages A - D. SL is of the combined call finder / line selector type and is exhibited by associated markers SLM with guidance from one side call indication from the line equipment LR and, on the other hand, digit information obtained from the register device on incoming calls. The station also contains a group selector GV comprising 4 6 A-C 31 partly a sub-stage A son »has an input connected via a lanyard SR to sub-stage B in SL and partly a sub-stage B which has an output connected to sub-stage D in SL. An overlay FIR for incoming traffic from interconnection to another station is connected to another entrance on stage A of GV and an overlay FUR for outbound traffic to interconnection is connected to another exit on sub-stage B of GV. The group selector's two part steps are displayed by the associated marker GVM, partly with the guidance of call indication received from SR or FIR and partly with the information obtained from the register device. The lacing line SR and the coated FIR are connected to one side of a register finder RS whose other side is connected to the register device. RS is displayed by an associated marker RSM when calling from the line or cover. From RSM there are also test paths for the marker SLM.

The register device REG is built around a logic controllable REP that can process data stored in an internal data memory with the guidance of instructions stored in an also internal program memory. REP cooperates with the electromechanical means located outside the register device via three interface units SLG, RSG and GVG in which a conversion is made of the signals exchanged with respect to levels and times to suit the requirements set by the units on both sides of the interface units.

This conversion can be carried out in a manner known per se, for example as shown in Swedish Patents 214,609 and 310,008. Thus, in Fig. 5 of the former, it is shown how relay contacts in the electromechanical units are sensed by means of pulsed gate circuits in which a diode receives bias from the relay contact in question by charging a capacitor which interferes with a pulse generator. Depending on this bias, the pulse supplied from the pulse generator is either blocked or transmitted to the computer system. The relay contacts are arranged in a matrix system consisting of rows and columns and sensing of the contacts is made in a row, the sensing result being obtained in the form of a data word where each bit corresponds to a column in the matrix.

Patent 310,008 shows in Figure 3b the circuits used for actuating relays in the electromechanical units. Also here, a matrix system consisting of rows and columns 5 64031 is used where each crosspoint contains a bistable rocker and a reed relay. By means of addressing gates, one row is selected at a time, at the same time setting pulses are applied to the flips of the designated row in response to the information in a data word where each bit corresponds to a column in the matrix. Operation signals to the electromechanical units are obtained from the end contacts of the respective reed relays.

Connected to the controller REP are three memories, namely the subscriber category memory AKM, the card number memory KNM and the conversion memory ORM and a further logical control unit DUP organized in a similar way as REP but provided with a typewriter SM with which new data can be written into the three memories .

In the following, a switching case will be described, whereby a call is made from an A subscriber to a B subscriber in the same telephone station. Each subscriber is connected to the station in the manner shown for the telephone apparatus TF shown in the figure.

In the known manner, a DC loop is formed in the known way through the A-subscriber's telephone apparatus, whereby a call relay in the line equipment LR switches on and gives a call indication to the marker SLM. This identifies the calling subscriber and provides a throughput to a free line of lines SR via sub-steps A and B of the subscriber selector step SL. Subsequently, the SLM calls the RSM marker associated with the register finder RS and orders the routing of the selected line to a RSG interface unit in the register device REG.

From the RSG connected unit, an indication signal is transmitted via RS, RSM and SLM to the SLG interface unit in REG. This signal has the purpose of identifying calling SLM in case the station is equipped with several seats. When this identification is effected, SLG sends an acknowledgment signal back via SLM, RSM, RS to the interface unit RSG which then calls the controller REP.

The call to REP causes this as the first measure to retrieve information about the A subscriber's identity from the SLM interface marker designated SLM and store this information in its data memory after which the SLM-SLG connection is released. With the guidance of the identity information, the control unit then reads the A-subscriber's category from the subscriber category memory AKM and also stores it in the data memory. By sensing a test path, from the line equipment LR

64C31, it is checked that connection has been established through the subscriber selector step, the lash line, the register finder to the interface unit RSG, whereby a return signal on the same tree causes the switching of a switch relay in the line equipment which in turn breaks the call to the marker SLM. This is released and thus also the marker RSM.

Depending on the category of the A subscriber, the interface RSG is prepared for receiving either finger disk pulses or keypad pulses after which switching tone is transmitted to the subscriber. The subscriber incoming digits are analyzed by REP using data stored in the ORM conversion memory and storing the analysis results in the data memory.

On the keypad telephones, in addition to keys for the ten digits 0-9, there are two extra buttons marked x and which are used as symbols for short numbers, thereby rendering a subscriber number with a reduced number of digits which can be converted to the full number with knowledge of the identity of the A subscriber. The conversion table is stored in the KNM card number memory. Even subscribers equipped with finger disk devices can, if they so wish, be available for this special service by being placed in a special category. In doing so, these subscribers must enter all full subscriber numbers with an extra number, e.g. 0, while card numbers start with another digit. This method thus means a sacrifice for the subscriber by extending the normal numbers by a number, but the profit is, however, great for such subscribers who prefer to phone to a limited number of counter subscribers.

An alternative method for utilizing the speed dialing service is to reserve certain entries to the subscriber selector step, SL, sub-step A for exclusively this service, eliminating the need for the aforementioned signs and extra digits for these entries. The method can advantageously be applied to subscriber switches where a number of central lines can be used for speed dialing in the manner specified here, while other central lines can be used for alternative speed dialing or normal numbering in the manner described above. Large subscriber switches are normally connected directly to the group selector step, GV, sub-step A. However, this does not mean any difference in principle for the application of the method.

Using the analysis result stored in the data memory, REP can also read the B subscriber's category from the subscriber category memory AKM and store it in the data memory. If the category designation shows that a connection can be allowed, calls are made to the group selector step GV via the interface unit RSG, the register finder RS and the leash line SR. The associated marker GVM identifies the input to stage A of GV on which the call is received and establishes a connection between it and the interface unit GVG. In a similar way as described for SLM, identification of the now called marker GVM is effected by sending an indication signal via RSG, RS, SR and GVM to GVG. The identification is acknowledged back to RSG and notifies REP.

The REP now transmits via GVG to the marker GVM the data that the marker needs to display the group selector GV to a free output line corresponding to the analysis result stored in the controller memory. Once this has been done, GVM and GVG are released, while calls are made at the input to sub-step D of the subscriber selection step SL. Calling input is identified by the marker SLM, which then calls the controller via the SLG interface unit. The SLM is identified in the same way as previously described by an indication signal from RSG which is passed over the line and the group selector to the marker, after which data corresponding to the last digits in the B subscriber's number is transmitted from the REP to the marker SLM in question. This seeks to find a free path through the subscriber selector step and notifies REP of the B-subscriber's condition (free, busy, etc.), if REP finds that throughput can be made an enforcement order to SLM and when the throughput has been performed SLM is released.

Using the RSG interface unit, the control unit REP sends a first ring signal to the B subscriber as well as a first ring control tone to the A subscriber, after which a final switching order is issued to the line SR. As SR takes over the slope of the well steps, the register device has fulfilled its task. Thus, the interface unit RSG can be released and all data relating to the switch is erased from the controller's REP data memory. The intermittent ring signal and ring control tone are now transmitted from the SR and as soon as the B subscriber answers the call, the call connection is interconnected in the SR.

Claims (1)

8 f. /! n 7 in Patent Claims: ^^ Computer controlled register for automatic telephone stations with at least one subscriber selector step (SL) and at least one group selector step (GV), each with its own marker (SLM, GVM), each of which normally comprises an actuator part and an analysis part as well as a number of over-dial connections (RS) connected register for digit reception of the type in which the called subscriber's numbers in the form of digit signals are received by one of the registers, stored and analyzed and forwarded, possibly after conversion, to respective markers (RSM), which, due to the received digit information, establish a switching path, characterized in that the telephone station contains a common register device (REG) which is a logical control unit (REP) comprising an arithmetic unit, data memory and program memory, which is common to a large number of switching processes. semi-permanent memories (ORM, AKM, KNM) for storing connection conditions, such as viaval information, subscriber category, card number additional tables to collect in the register all the analysis functions that are normally performed by the markers and that the register except the normal connection path over connection readings (RS) has a connection with the subscriber step marker (SLM) and a connection with the group selector step marker (GVM) so that, after analysis of the the present information regarding the calling and calling subscriber to the markers in the respective selector steps, transmitting operation information.