DE2745106A1 - Charge display for centrally controlled telephone PBX - accesses store position corresponding to calling extension and local line and displays accumulated charge pulses - Google Patents

Abstract

The PBX has a circuit identifying the calling subscriber and the exchange line connected to it, when expensive trunk calls are made. A central charge store has storage locations equal in number to that of extensions and exchange lines. Charge pulses are added and stored in the storage locations for the extension and the exchange line. Depending on the operational state of the operator's position, after the extension number and the exchange line are dialled through the operator's dial switch, the corresponding storage location in the store is accessed and its content is visually displayed at the operator's position.

Description

Circuit arrangement for display of charges for central

controlled E'Frnmelde-, in particular telephone extension systems The invention relates to a circuit arrangement for displaying charges at a central location Controlled telecommunication, in particular telephone branch exchange systems with one device to identify de3 to be charged, calling subscriber line and the external line connected to this for chargeable external connections and with a central fee store, which contains just as many storage spaces, such as subscribers and trunk lines connected to the private branch exchange are, whereby the charge impulses incurred during the chargeable external calls added up and on the relevant storage locations of the subscriber line and the external line of the charge memory during the call.

To record the charges incurred on a subscriber line become the subscriber connections of a telecommunications system, in particular a telephone exchange equipped with counting and storage devices, which have the task of providing for the subscriber connection determined during a chargeable call connection add up incoming charge impulses and the sum of all incoming charges To save charge pulses. The number of within a certain reading period The incoming charge impulses then form the basis for billing, which is carried out by the telecommunications management.

So far, electromechanical metering devices have been used for this purpose, which is driven by an electromagnet charged with the charge pulses mechanical Own counter. Because this counter is its setting is retained in the idle state, it is only a memory that can also be used in the event of a failure l the operating voltage retains its information. In addition, the counter is visually readable in numbers.

These counters represent a simple means of recording the Gohi.hren are, however, iucb with some disadvantages, such as low counting speed, large space requirement, lack of electrical readout, etc. afflicted.

It is already known these subscriber-individual counting devices to be replaced by a shared charge storage facility. One such facility is for example in DT-tS 1 762 2626. The fee store owns as many storage spaces as there are subscribers connected to the switching system are. If a charge pulse arrives on a subscriber line, then wid the relevant subscriber connection identified with the subscriber address of the relevant memory location of the charge memory controlled with the memory content a common counter for all subscriber lines (adder set, this is set to the next step with the incoming charge pulse and then the new payers position in the storage space of the subscriber line concerned transfer. This process is repeated with every charge pulse that appears on a Subscriber line of the switching system arrives.

A central fee store has the advantage of not requiring much money, especially if it is designed as a semiconductor memory. It is of concern, however to ensure that the memory contents are not lost if the operating voltage fails.

The contents of the memory are not directly optically readable given and also not necessary in many cases, since the entire memory content closed and read out in connection with the respective host address in a central do3tell processing system for calculating the amount of agitation are evaluated core. In certain cases it may now be desirable to have the content in the memory of the charge memory visible, e.g. for interim checks between the regular reading of the charge memory for the purpose of calculating the incurred Fees or as the only possibility of access to the memory content for smaller ones Telephone PBXs, in which the small number of subscriber lines an economic calculation of the fees by a data processing device does not allow.

The object of the invention is now to show a way such as the memory content of a central charge memory is easily visible can be made.

This object is achieved according to the invention in that as a function from the operating state of the operator station (for example in the rest position) after Enter the number of a subscriber line or an exchange line via a Dialing device provided for controlling switching processes at the operator station the memory location of the charge memory assigned to this number is activated and the memory content is visible with the aid of a display device at the operator station is made.

It is already known, the number of charge pulses or also to display the fees at the operator station, either automatically or at the request of the operator at the operator station. This is what it is about for the fees that have been incurred during a connection, which over handled the operator station (see SEG-Nachrichten 1955, issue 2, page 87) and not the current rate of charges for a subscriber line. In addition, the operator station is not able to call up specific charge information, which are not related to connections that are outside the operator station were settled.

A further development of the invention is that by entering a special identification number in front of the actual phone number of the process is initiated to display the charges.

A further development of the invention is also that by pressing a special call charge button before dialing the number the process for displaying charges is initiated.

Further advantages result from the remaining subclaims.

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

The charge memory SP has the same number of memory locations (1 to r) how subscribers and trunk lines are connected to the switching system. The individual memory locations are controlled via a memory control SPA, which is designed as a decoder and which runs cyclically on lines Al - An consecutively created by the central control device ZST binary addresses of all subscriber lines and trunk lines into a value 1 from r.

The memory is equipped with a counter Z with its outputs and inputs connected, which preferably works as a decimal counter and a width of, for example Has 5 digits. If the BDC code is used, there are four per decimal place bit, which results in a word length of 4 x 5 = 20 bits.

This allows a total of a maximum of 99999 charge pulses to be displayed. The size of the individual storage space of the charge memory SP is for this word length to be provided, the word length being determined by the time interval of the reading process will.

Charging pulses are saved as follows: as soon as the address of the subscriber line concerned is on the lines Al to An or the exchange line appears, put the central control device ZST on the line in question occurred charge pulse to the line GP, namely for the duration of the queuing of the address on the line manager Al to An, whereby the AND gate G1 is being prepared.

With the arrival of the control cycle T1 of the internal sequence control the AND gate G1 is released, whereupon the reading is carried out via the OR gate G3 of the memory location controlled by the address applied on lines Al to An of the charge memory SP is initiated.

The content of the controlled one offered at the output of the charge memory SP Storage space is transmitted to the counter Z via the lines W1 to W9, the takes over this information with the control cycle T2 of the internal sequence control. The charge pulse on line GP has also prepared AND gate G4, so that the release takes place with the next control cycle T3 that appears, whereupon the counter Z is increased by one step. The new counter position is with the Control clock T4, which is the AND gate prepared by the charge pulse on the line GP G4 frees up the same memory space that was still used by the on the lines A1 until the pending address is activated.

Fto connection, each incoming charge pulse is registered twice, both for the subscriber line and for the one connected to it Trunk.

The control clocks T1 to T2s occur in each case within the period the queuing of an address on the lines Al to An in ascending order one after the other, they are used to control the processes according to a predetermined one fixed schedule.

To control a memory location of the charge memory SP can when the operator station BP is idle, i.e. when the query key fr, ^ or when the hook switch, not shown, is not actuated, via the selector S (number switch, Keypad) the phone number of the desired subscriber connection or the exchange line be entered. This arrives via the line WL to the call number memory RSP, which saves the complete phone number. The number also appears at the same time in the central control device ZST. However, since the operator station is in the idle state no further processing takes place there.

The UM corrector is a read-only memory that has just as many storage spaces possesses how subscriber connections and trunk lines are available. Any storage space contains the call number assigned to the relevant subscriber line or trunk line. Since trunk lines cannot be dialed and accordingly do not have a phone number, it is advisable to number them consecutively and to add the official exit number to the digits to put forward.

With each address created on the lines Al to An, the Corrector UM the control of a memory location, whereupon at the output of the corrector the number stored there appears on lines Rl to Rm. About these Lines, the call number is sent to the comparator V, which is sent via the lines R1 ' until Rm the call number contained in the call number memory RSP is offered. As soon a match Between the two phone numbers, the delivers Comparator V a signal which the AND gate G2 prepares. With the actuator cycle T1 is enabled, whereupon via the OR (intter G3 of the on the lines Al to An pending address controlled storage space which corresponds to the desired Subscriber connection or the trunk line corresponds, is read out. The memory content is via the lines W1 to W @ dor the display device AZ of the operator station BP offered and accepted, since the display device AZ is already via the AND gate G prepared and released by the signal of the comparator V.

As already described, the counter Z is also in turn when it occurs of the control clock T2 with the content of the activated memory location of the memory SP set. Since in this case the counter contents are not changed and do not search is again written into the charge memory Sp - the AND condition is missing at AND gate G5 - this process has no influence on the rest of the process. Of the If a new address is available on the lines Al to An, the counter can either automatically deleted or possibly with new information from the charge memory SP are overwritten.

The display device AZ consists of a memory, a 7-segment encoder and a 7-segment display for each decimal place, in the example given Each of these facilities is accordingly available five times. In the exemplary embodiment it is assumed that the charge storage is made of a memory with non-destructive Reading is formed. Otherwise, with the control clock T4, the buffer stored in the counter would have to be The contents of the memory cell can be written into this again.

As soon as during the process of displaying the memory content a memory line of the charge memory SP a charge pulse for the relevant When storage space arrives, the AND gate G is blocked via the reverse level. the The display on the display device is retained and will be activated when it appears next the corresponding address on the lines Al to In brought to the new value, by replacing the old contents of the memory of the display device AZ with the new contents of the storage space of the charge memory SP is overwritten.

It is also conceivable to display the charges by choosing a specific Call number before the actual call number of the subscriber connection or the exchange line initiate. For this purpose, the call number memory RSP is provided with an additional memory space to equip in which this phone number is stored and what at the exit of the call number memory RSP on the line RF an enable signal for the AND gate G is generated. In this case, the connection of the key TA to the AND gate G not required.

The initiation of the charge display at the operator station is also the same possible by pressing a special charge inquiry button that is linked to this Purpose is to connect to the GAT AND gate G instead of the TA key.

For the purpose of clarity and ease of use of the operator station is to use an existing display device to display the charges AZ conceivable, which can also be used for other purposes, such as the notification of a petition for office of a subscriber line, display of the charges incurred during a connection etc. serves. For this purpose, suitable switching devices must be looped into lines W1 to W9, which either from the button TA, the GAT key or from the phone number memory RSP are to be controlled via the RF line.

All subscriber accounts are now supposed to be on their billing meter reading are queried in succession in the charge memory SP, so is a number generator to be connected to the call number memory RSP, which in time intervals that are to be noted down number and number of charge pulses is sufficient, a new one in each case Call number generated and thus a control of all storage locations of the charge memory SP made possible in the manner described, although the one generated in each case Call number also at operator station BP together with the number of charge pulses is to be displayed.

Claims (7)

Claims arrangement for Gebii} lren display with centrally controlled Telecommunication, in particular telephone branch exchange systems with a device for Identification of the calling subscriber line to be burdened and the dunaen connected with it Main line for external connections that are subject to charges and with a central Fee separator, which contains as many storage spaces as subscribers and Trunks are connected to the private branch exchange, with the added up during the chargeable external calls incurred charge pulses and on the relevant storage locations of the subscriber connection and the trunk line of the charge memory can be stored during the call, characterized in that that depending on the operating status of the operator station after entering the call number a subscriber line or an exchange line via one for the control of switching processes Dialing device (S) provided at the operator station is the one assigned to this call number Storage space of the charge memory (SP) and the memory content with Using a display device (AZ) is made visible at the operator station. 2. Circuit arrangement according to claim 1, characterized in that by entering a special elimination code before the actual Call number the process for displaying the charges is initiated. 3. Circuit arrangement according to claim 1, characterized in that by pressing a special charge inquiry button (GAT) before choosing the Piifnummer the process for displaying charges is initiated. . Schal.tungsanordnlmg according to claims 1 to 3, characterized in that that the call number entered by the operator station (BP) is stored in a call number memory (RSP) is cached that the charge memory (SP) and a corrector (UM) with the addresses (- To) of all connection lines (subscribers, exchange lines) of the telephone extension are controlled cyclically one after the other so that the corrector (UM) every address converted into the associated call number and if it matches the one in the call number memory (RSP) contained call number the relevant memory location of the memory (SP) is read out and its content is visible at the operator station (BP) by means of a display device (AZ) is made. 5. Circuit arrangement according to claims 1 to 4, characterized that the display device (AZ) is also used for other display purposes (for example Display of a request for office from an extension connection, display of during a Connection incurred charge impulses, etc.). 6. Circuit arrangement according to claims 1 to 5, characterized in ' dß the display device (AZ) from a memory with a downstream 7-segment encoder and a 7-segment display connected to it. 7. Circuit arrangement according to claims 1 to 6, characterized in that that when there is a charge pulse for a memory location of the charge memory (SP) the UberBabedes memory content of the relevant memory location to the display device is prevented.