DE3137093A1 - Circuit arrangement for setting up a connection between a subscriber station and the manual switching position (switchboard position, operator's position) by direct dialling (direct dialling to the exchange) in telephone systems, especially telephone private branch exchanges - Google Patents

Abstract

The invention relates to a circuit arrangement for setting up a connection between a priority subscriber station and the manual switching position by direct dialling (direct dialling to the exchange) in telephone systems, especially telephone private branch exchanges, having a central controller and possibilities for connecting priority lines. According to the invention, in the case of the aforementioned circuit arrangement, the peripheral processors which are already present for the connection of priority lines are also used for implementing the performance feature "direct dialling to the exchange". <IMAGE>

Description

Circuit arrangement for establishing a connection between

a subscriber station and the operator station by means of direct call (Direct call to the control center) in telephone systems, in particular telephone extension systems. in particular television private branch exchange systems. The invention relates to a circuit arrangement to set up a connection between a subscriber station and the operator console by means of direct calls (direct calls to the control center) in telephone systems, in particular telephone branch exchange systems with a central control and connection options for preferred lines.

Modern telephone exchange systems with a central control and connection options for preferred lines have an interface for the connection of telephones with preferred lines. These participants can Select certain employees with the push of a button and connect them to a conference. The connection is established between the preferred participant and the employee via a separate switching matrix connected upstream of the normal switching matrix. In addition to the "connection of preferred lines" feature, modern telephone extension systems for privileged subscribers, the performance feature 1 "direct call to the control center" is required. This line feature enables the preferred subscriber by pressing a button establish a connection to the operator console.

The object of the present invention is to provide a circuit arrangement of the type mentioned above, which introduces the direct call feature to the headquarters "without much additional effort and without major Interventions in the existing private branch exchange are made possible. This task is carried out according to the invention solved in that the preferred subscriber station an additional line is assigned to the ground potential via a special key when the handset is on-hook can be created and led to a connection module for preferential line which is connected to a preferred line processor, the processor two groups of connected subscriber station differ, of which the one group with direct call facilities and the other group with facilities for Connection of preferred lines is equipped, and that when the processor is occupied for preferential lines through a subscriber station with direct call facility by means of Applying earth potential to the additional line when the handset is in place a connection to the operator console is switched through via the normal switching network will.

The advantage of the solution according to the invention is that for introduction the additional performance feature "direct call to the control center" in telephone extension systems with a central control and connection options for preferred lines the existing hardware assemblies can also be used. This is possible because that the connection assemblies provided for the connection of preferential lines or processors show a production-related size in most of them Facilities are not fully utilized.

An expedient development of the circuit arrangement according to the invention is characterized in that a subscriber station has both a direct call facility as well as a device for connecting pre train lines assigned.

The subject matter of the invention is illustrated below with reference to a figure explained, with only those necessary for understanding the invention in the figure Facilities are shown.

The FIG shows parts of a centrally controlled telephone private branch exchange shown, which relate to the circuit arrangement according to the invention. There are shown the coupling network KN with the central control OST, a switchboard VF, an interface module for the PLS operator console, and a processor for the Switchboard PLP, an interface module for preferred lines VZA, as well as a Processor for preferred cables VKP. The two processors are via a control bus St-B connected to the central control system OST.

There is also a preferred subscriber station with a direct call facility DA subscriber shown. This station is connected to an additional control line, via the interface module for preferred lines VZA with the processor for preferred lines VKP is connected. The assignment of the processor for the preferred line VKP by the privileged subscriber station with direct call facility takes place when on-hook Handset, i.e. closed contact GU by pressing the contact DAK. Will the processor for preferential line VKP from an authorized subscriber station Direct call facility occupies so he requests one from the central control OST Connection path to the attendant console. This connection path is then via the Coupling network KN established as shown in the FIG represents is. The direct call subscriber thus has the option of just pressing a button to establish a connection to the attendant console VF.

Furthermore, a preferred subscriber station V-subscriber is shown in the FIG shown with a device for connecting preferred lines VZLE. Of the Processor for preferred lines VKP decides whether it is based on the assignment at the occupying subscriber station by an incentive for direct call - via the direct call line DA-Ltg - or an incentive for connecting a preferred line. Of that dependent is either a connection via the coupling network KN to Vermittlungsm Platz VF switched through or via an upstream in the FIG separate switching network, a preferred line is connected.

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Claims (2)

Claims sharp circuit arrangement for establishing a connection between a preferred subscriber station and the operator station by means of Direct call (direct call to the control center) in telephone systems, in particular telephone extension systems, with a central control and the option to connect preferred lines, d a it is indicated that the privileged subscriber station (DA-Tln) an additional line is assigned to which when the handset is on-hook ground potential can be applied via a special key (DAK) and which is connected to a Connection module for preferential lines (VZA) is performed, which with a processor for preferential lines (VKP) is connected; the processor having two groups of connected Subscriber stations differentiate from which a group with direct call facilities and the other group with devices for connecting preferred lines (ZLE) is equipped, and that when the processor is occupied for preferential lines VKP through a subscriber station with direct call facility (DA-Tln) with application of ground potential when the handset is on-hook, the additional line connects to the attendant console VF is switched through via the normal switching network (KN) 0 2. Circuit arrangement according to claim 1, that a subscriber station (V-Tln) both a direct call device (DA-Z) and a device for connection of preferred lines (VZLE).