DE2745106B2 - Circuit arrangement for displaying charges in centrally controlled telecommunications, in particular telephone branch exchange systems - Google Patents

Description

The invention relates to a circuit arrangement for displaying charges for centrally controlled telecommunications, in particular telephone exchange systems with a device for identifying the person to be charged, calling subscriber line and the external line connected to it for external connections that are subject to charges and with a central charge memory, which contains just as many storage spaces, how subscribers and trunks are connected to the private branch exchange, where the during the chargeable external calls

ίο accumulated charge impulses and added to the relevant memory locations of the subscriber connection and the exchange line of the charge memory can be stored during the call and the memory content of each memory location with a

! 5 a targeted control by the operator station with Can be made visible using the present display device.

To record the charges incurred on a subscriber line, the subscriber lines a telecommunications, in particular telephone exchange system with counting and storage facilities equipped, which have the task of being determined for the subscriber connection, during a chargeable Total incoming call connection charge pulses and the sum of all up to to store charge impulses that have arrived there. The number of within a certain reading period incoming charge impulses then forms the basis for the billing, which of the telecommunications management is carried out.

So far, electromechanical billing meters have been used for this purpose, which one of a with the charge pulses applied electromagnet have driven mechanical counter. There if this counter maintains its setting in the idle state, it also represents a memory that is also used for Failure of the operating voltage retains its information. In addition, the counters are numerically visual readable.

Although these counters are a simple means of recording the charges, they are also available some disadvantages, such as B. low counting speed, large space requirement, lack of electrical reading option, etc. afflicted.

It is already known this participant-individual To replace counting devices by a common charge memory. One such facility is for example in DE-AS 1 76 22 626 described. The charge memory has just as many

as well as storage locations as subscribers on the switching system are connected. If a charge pulse arrives on a subscriber line, 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 for all subscriber lines Counter (adder) set, this with the incoming charge pulse to the next Step made and then the new counter steleo development in the memory 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 charge memory has the advantage of requiring little space, especially if it is used as a semiconductor memory is trained. However, care must be taken that the contents of the memory are saved in the event of a failure of the

Operating voltage is not lost

A direct visual readability of the memory contents is not given and also not necessary in many cases, since the entire memory contents are closed read out and in connection mk the respective subscriber address in a central data processing system can be evaluated to calculate the fees incurred. In certain cases it can now be desirable to make the memory content of the charge memory respectable, for example to Intermediate checks between the regular readouts of the charge memory for the purpose of calculating the Charges incurred or as the only option to access the memory content for smaller private branch exchanges, where the low number of subscriber lines is an economic one Calculation of the fees by a data processing device does not allow

In the older patent application DE-OS 27 18 796, a circuit arrangement for displaying fees Proposed in private branch exchanges with individual call and total counting per extension, at which a targeted control of the individual memory locations and the subsequent display of the relevant memory content is possible at the operator station of the private branch exchange Storage locations are made from the operator station. the The charge display is initiated by a special service call.

The object of the invention is now to show a way how the memory content of the central Charge memory can be made visible, with the necessary procedures in particular are simple and the input means that are already available at the operator station can be used.

This object is achieved according to the invention in that, depending on the operating state of the operator station (for example in the rest position) after entering the phone number of a subscriber line or a Exchange line via a dialing device provided for controlling switching processes at the operator station the charge memory storage space assigned to this number is activated.

The older application DE-OS 27 18 796 gives no indication of where and in what form the data for Identification of a storage location must be entered.

An advantageous development of the invention is also that by actuating a special charge inquiry button before dialing the number so initiated the process of charge display will.

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 as many storage spaces (1 to r) as subscribers and trunk lines are connected to the switching system. The individual memory locations are controlled via a memory controller SPA, which is designed as a decoder and converts the binary addresses of all subscriber lines and trunk lines, which are applied cyclically one after the other by the central control device ZST on the lines AX-An, into a value 1 from r.

The outputs and inputs of the memory are connected to a counter Z , which preferably works as a decimal counter and is, for example, 5 digits wide 20 iit results

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

Charging pulses are stored as follows: As soon as the address of the subscriber line concerned or the exchange line appears on the lines AX to An , the central control device ZST applies the charge pulse that has occurred on the line in question to the line GP, for the duration of the queue the address on lines AX through An, which prepares the AND gate GX. With the arrival of the control pulse TX of the internal sequence control, the AND gate Gt is released, whereupon the OR gate G 3 causes the memory location of the charge memory SP controlled by the address applied on lines A 1 to An to be read out

The content of the controlled memory space offered at the output of the charge memory SP is transmitted via the lines WX to W9 to the counter Z , which takes over this information with the control clock Tl of the internal sequence control. The charge pulse pending on the line GP has also prepared the AND gate GA, see above that with the next appearing control clock TZ the release takes place, whereupon the counter is incremented on the one hand. The new counter position is written in with the control clock TA, which releases the AND gate GA prepared by the charge pulse on the line GP again in the same memory location which is still controlled by the address pending on the lines AX to An.

Each incoming charge pulse is per connection registered twice, both for the subscriber line and for those with it connected trunk.

The control clocks Ti to TA occur one after the other in ascending order within the period in which an address is pending on the lines AX to An ; they are used to control the processes according to a predetermined fixed sequence.

To control a memory location of the charge memory SP can in the idle state of the operator station BP, d. h, if the query button TA or if the hook switch, not shown, is not actuated via the dialing device S (number switch, keypad), the number of the desired subscriber connection or the exchange line are entered. This arrives via the line WL to the call number memory RSP, which stores the complete call number. At the same time, the call number also appears in the central control device ZST. However, since the operator station is in the idle state, no further processing takes place there

The corrector UM is a read-only memory which has as many storage spaces as there are subscriber connections and breathing lines. Each memory location contains the respective subscriber connection or the telephone number assigned to the respective exchange line. Since trunk lines cannot be dialed and accordingly no call number

If you have more people, it is advisable to number them consecutively and to add the official exit number to the digits to put in front.

With each address applied to lines A 1 to An , a memory location is activated in the corrector UM , whereupon the phone number stored there appears on the lines R 1 to Rm at the output of the corrector. Via these lines, the call number reaches the comparator V, to which the call number contained in the call number memory RSP is offered over the lines RV to Rm '. As soon as there is a match between the two call numbers, the comparator V delivers a signal which the AND gate C 2 prepares. The release takes place with the control clock Ti , whereupon the memory location controlled by the address on lines A i to An , which corresponds to the desired subscriber line or the exchange line, is read out via the OR gate G 3. The memory content is offered and accepted via the lines IV1 to JV9 of the display device AZ of the operator station BP , since the display device AZ has already been prepared via the AND gate G and released by the signal from the comparator V.

As already described, the counter Z is again set with the content of the selected memory location of the memory SP when the control clock T2 occurs . Since in this case the counter content is not changed and is not written into the charge memory Sp again - the AND condition at AND gate G 5 is missing - this process has no effect on the rest of the process. When a new address is present on lines A 1 to An, the meter can either be automatically deleted or, if necessary, overwritten with new information from the charge memory SP.

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 devices is accordingly present five times. In the exemplary embodiment, it is assumed that the charge memory is formed from a memory with non-destructive reading. Otherwise, the content of the memory cell temporarily stored in the counter would have to be rewritten into the counter with the control clock pulse 7 * 4.

As soon as a charge pulse for the relevant memory location arrives during the process of displaying the memory contents of a memory line in the charge memory SP , the AND gate G is blocked via the reversing stage. The display on the display device is retained and is brought to the new value with the next appearance of the corresponding address on lines A 1 to An by overwriting the old content of the memory of the display device AZ with the new content of the memory location of the charge memory SP.
It is also conceivable to display the charges by choice

ίο to initiate a specific number before the actual number of the subscriber connection or the exchange line. For this purpose, the call number memory RSP is to be equipped with an additional memory space in which this call number is stored and which creates a release signal at the output of the call number memory RSP on the RF line. for the AND gate G is generated. In this case, the connection of the key TA to the AND gate G would not be required.

It is also possible to initiate the charge display at the operator station by pressing a special charge query key GAT, which is to be connected to the AND gate G instead of the TA key.

For the sake of clarity and ease of use of the operator station, it is conceivable to use an existing display device AZ to display the charges, which can also be used for other purposes, such as B. the display of a request for office of a subscriber connection, display of the charges incurred during a connection, etc. is used. For this purpose, suitable switching devices are to be looped into the lines Wl to IV9, which either from the button TA, the button GA T or

is to be controlled from the call number memory RSP via the RF line.

If all subscriber connections are to be interrogated one after the other for their charge meter reading in the charge memory SP , a call number generator must be connected to the call number memory RSP , which generates a new call number at time intervals that are sufficient to note down the call number and the number of charge pulses and thus control all storage locations of the charge memory SP in the manner described, however, the call number generated in each case is also to be displayed at the operator station BP together with the number of charge pulses

1 sheet of drawings

Claims (5)

Patent claims: 1.Circuit arrangement for displaying charges in centrally controlled telecommunications, in particular telephone auxiliary systems, with a device for identifying the calling subscriber line to be charged and the trunk line connected to it for external connections subject to charges and with a central charge memory which contains as many storage locations as subscribers and trunk lines the private branch exchange system are connected, the charge pulses occurring during the chargeable external connections added up and stored in the relevant memory locations of the subscriber line and the exchange line of the charge memory during the call and the memory content of each memory location visible through targeted control by the operator station with the aid of the display device available there can be made, characterized in that depending on the operating status of the operator station (b e for example in the rest position) after entering the call number of a subscriber line or an exchange line via a dialing device (S) provided for the control of switching processes at the operator station (BP) , the storage space of the charge memory (SP) assigned to this call number is controlled. 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 charges is initiated. 3. A circuit arrangement according to claim 1, characterized in that the process of displaying charges is initiated by actuating a special charge query key (GAT) before dialing the call number. 4. Circuit arrangement according to Claims 1 to 3, characterized in that the call number entered by the operator station (BP) is temporarily stored in a call number memory (RSP) , that the charge memory (SP) and a corrector (UM) with the addresses (A i— On) all connecting lines (subscribers, exchange lines) of the private branch exchange are controlled cyclically one after the other, so that the corrector (UM) converts each address into the associated call number and, if it matches the call number contained in the call number memory (RSP) , reads out the relevant memory location of the memory (SP) and the content of which is made visible at the operator station (BP) by means of a display device (AZ). 5. Circuit arrangement according to claims 1 to 4, characterized in that when a charge pulse is present for a memory location in the charge memory (SP), the transfer of the memory content of the memory location in question to the display device is prevented.