DE3138118A1 - Method for identifying the authorisation of subscriber stations in telephone PABX systems - Google Patents

Abstract

The invention relates to a method for identifying the authorisation of subscriber stations in telephone PABX systems with dialling evaluators and authorisation evaluators. According to the invention, an authorisation check is not carried out only on receipt of the complete dialling information, but immediately following identification of the need for an authorisation check on the basis of the previously received digits of the dialled telephone number. This results in a minimum occupancy time of the system parts common to a multiplicity of connections and in a reduction of the technical switching cost of these system parts. <IMAGE>

Description

Procedure for determining the eligibility of partial

Subscriber stations in telephone exchange systems.

The invention relates to a method for determining authorization of subscriber stations in telephone extension systems with dial evaluators and authorization evaluators.

When dialing a specific number in a private branch exchange with election evaluators and authorization evaluators, the voting information becomes a register which saves the dialing information up to its completeness and at the end of the election to an authorization evaluator of the central control. Of the Authorization evaluator initiates an identification and authorization check of the calling party.

I In some applications it may be that -that to determine the Authorization of a subscriber station not all digits of dialing information necessary are, this applies in particular to larger telephone exchange systems.

Such an application would be given, for example, if the same System, external participants are also connected. This would be the case if two companies that were independent of one another would share one and the same plant, whereby the system itself would not be duplicated, but both companies would have all system parts together use. In this case, an internal connection between Participant positions of one company and participant positions of the other company are excluded. Included it can now be that the first or the first two digits indicate the affiliation the subscriber station to one of the connected to one and the same private branch exchange Provide information to companies.

The object of the invention is to provide a method of the type mentioned at the beginning Type to indicate that a quick review of the authorization of participant sites when establishing a connection within the extension.

This object is achieved in that after the first or the second or third digit dialed into a register is a voting evaluation in the election evaluator and when recognizing a digit that requires an authorization check, or a combination of digits, a check of the authorization in the authorization evaluator takes place that, in the case of authorization, the register prepares for a further selection and at the same time a further election evaluation is initiated, the result of which '| Wd1 incomplete "the register is ready to accept the remaining digits of the call number switches, and that in the event of non-authorization immediately after checking the Authorization to the subscriber station a busy tone is created.

The advantage of the method according to the invention is that the Authorization check is brought forward so that not until the beginning of the authorization check all dialing information must be entered. Another advantage of the invention Procedure can be seen in the fact that the occupancy times of the house transfer and the Register can be shortened considerably, since in the case of a non-authorization house transfer and Register is switched off and the subscriber station concerned emits a busy tone receives. Another advantage is a reduction in the circuitry Effort, since the ranking for the election evaluation can be reduced considerably, so that there is, for example, a considerable saving in switching diodes.

The method according to the invention is explained with reference to a FIG.

In the figure is a circuit arrangement for implementing the invention Method shown, with the circuit arrangement shown is a private branch exchange of the type ESK 300E and only for the understanding The assemblies necessary for the invention are shown.

In the case of the private branch exchange shown in the figure, it is assumed that that the subscriber B subscriber B is the calling subscriber and the subscriber A subscriber A is the called subscriber. With A-K, B-K, C-K and D-K are those individual coupling stages of the speech path network. Signals the participant B by picking up the handset that he wants to set up a connection so becomes HUe assigned him a free house transfer. House transmission is via the coupler U-K HUe assigned a register Reg to record the choice. The register Reg is accessed via a register searcher for election evaluators RegSuWBW an election evaluator WBW assigned. Of the Election evaluators WBW is linked to the register at the end of each election series and receives voting information from this. Due to logical links, the WBW election evaluators derive additional control commands from this, which are used to determine lung of the program are required. Every time before connecting the authorization of a subscriber line must be determined, the authorization evaluator BAW requested via the register searcher for authorization evaluators RegSuBAW. Of the Authorization evaluator BAW initiates the thousands finder for authorization evaluators TSuBAW an identification and authorization check of the calling subscriber. To The authorization evaluator initiates a positive authorization check BAW takes over the identified subscriber call number in the code memory CS and at the same time the connection of the voice connection. The in the code memory CS The stored subscriber number is transferred to the switch via a dial code converter WCU for the coupling stages of the speech path network An and is used for switching through the voice connection. It goes without saying that to switch through a voice connection further assemblies are necessary, but on their description in this context are omitted as they are assumed to be generally known and for understanding do not contribute to the circuit arrangement according to the invention.

The following is the mode of operation of the private branch exchange shown in the FIG to determine the authorization of participant locations in the event of "foreign participants" described. It is assumed that subscriber B is the calling subscriber and subscriber A is the called subscriber who is either a foreign subscriber or is a participant belonging to the same company. The participant numbers or

individual digits or codes that identify other participants are entered in the election evaluator WBW.

This election judge will, as has already been stated is, connected to the register after each digit.

If the election evaluator recognizes WBW based on the first or

the first and second entered digits that it is the desired Participant is a foreign participant, the register will be notified immediately the authorization evaluator WAW requested. This causes an identification of the calling subscriber and an authorization check. If the authorization check falls negative, a busy tone is immediately sent to subscriber station B and the house transfer and the register activated. That is, in the case of a Non-authorization of participant B immediately after the first one or a stranger Subscriber identifying digits receives a busy signal, which means that they can dial out is unnecessary.

If the eligibility check is positive, an election evaluation is carried out of the candidate with the statement "choice incomplete" the register for the admission the remaining digit of the dialed number is ready for recording. Of the participants B can continue the dialing and after the dialing the connection is switched through.

1 claim 1 figure

Claims (1)

Method for determining the authorization of subscriber stations in private branch exchanges with dial evaluators and authorization evaluators, d a d u r c h e k e n n n z e i c h n e t that after the first, or second or Third digit dialed into a register (Reg) is an election evaluation in the election evaluator (WBW) and when recognizing a number that requires an authorization check or Number combination a check of the authorization in the authorization evaluator (BAW) takes place that, in the case of authorization, the register (: Reg) for a further selection prepared and at the same time a further election evaluation is initiated, the result of which "Dial incomplete" the register (Reg) to accommodate the remaining digits of the Call number switches ready to receive, and that immediately in the event of non-authorization after checking the authorization at the subscriber station (subscriber B), a busy tone is created will.