DE4113359A1 - PROGRAM-CONTROLLED TELEPHONE EXTENSION SYSTEM - Google Patents

Abstract

The installation, affording a conventional call-back facility for the duration of an internal or external call, enables an internal terminal (T2) in a hold condition to instigate the formation of an attentiveness signal. The controller (CC) forwards this signal, for optical display or acoustic sounding, to any terminal (T1) initially in conversation with the instigating terminal (T2) and subsequently in a call-back relationship with another terminal (T3). USE/ADVANTAGE - Integrated services digital network: internal terminal in hold condition can be brought into operation on expiry of call-back condition.

Description

Different private branch exchanges are known which in addition to the actual operator control also to a Control or implementation of additional, over the actual Mediation process of additional control processes are capable. Such additional functions are commonly called Lei Designated features, especially for the communica "Language" service a large number of different services is known. Tough on such features len, for example, the display of operator instructions optical display devices of the terminals and the manufac Development of inquiry connections during an internal or egg an external connection.

From the Siemens "HICOM 600 SYSTEM Product Data ", Order No. A19100-K3161-G430-01-7600 (Page 35), and "ISDN in the Office", Special Issue of telcom report and Magazine COM, pages 56 to 64, ISBN 3-8009-3849-9, is already a program-controlled private branch exchange known the inquiry connections both during an external connection realized as well as during an internal connection: Wäh rend an incoming or outgoing external or internal An extension subscriber can have an internal or also call an external participant and so a query talk. During the query, the original Ge kept in touch. In the query status, more can Services are used such as "intrusion" or "call waiting" and "Initiate conference". However, these services can only be done by the internal terminal that initiated the query initiated the conversation. In contrast, this is on hold staggered internal terminal limited to the end of the Consultation status and the restoration of the original Waiting call state.

The invention is based on the problem of one in the Haltzu stood offset internal terminal of a program-controlled PABX the possibility to open up to work towards ending the query status.

This problem is solved according to the invention with the features of Pa claim 1 solved.

The invention is characterized by a number of advantages out. First, existing program-controlled remote private branch exchange systems, in particular systems with operating programs that use the "Consultation (during a internal or external connection) "in simple Way in telecommunications private branch exchanges according to the invention shape. This is especially true if one before available PBX an operating program indicates that the "Call Waiting" feature is implemented.

Leave the attention signs formed according to the invention on the terminal that initiates the consultation connection, aku signal visually and / or visually.

The invention will now be described with reference to the drawings.

Show it:

Fig. 1 is a program-controlled private branch exchange according to the invention, and

Fig. 2 terminal and connection state-individual memory for a first, second and third terminal in different connection states.

The telephony private branch exchange according to the invention, shown schematically in FIG. 1, is in particular an ISDN-capable remote signaling private branch exchange, which in its basic structure can be designed as the communication system described in the aforementioned product specification "ISDN in the Office". This system consists of a system center PBX with a control unit CC, which can be connected with so-called peripheral modules and a switching network SN. The peripheral modules in particular include subscriber line circuits SLM 11th . . as well as so-called line set circuits TM 11 . . . The subscriber line circuits SLM 11 are subscriber-oriented device connections, such as, for example, ISDN basic connections for digital mono- and multifunctional terminals, 1-channel connection modules for terminals, such as digital voice terminals and switching terminals, and subscriber terminals for analog voice terminals. The terminals T 1 , T 2 , T 3 shown in FIG. 1 can be digital or analog voice terminals. T 1 and T 2 are internal terminals; T 3 can be an internal terminal or an external terminal. In Fig. 1, the terminal T 3 connected to a line set circuit TMnm is shown as an external terminal.

The TM 11 wiring harness. . . are used to connect to public and / or private networks or special facilities and are, for example, ISDN basic connections for ISDN exchange and cross traffic (two channels at 64 kbit / s and ISDN signaling) as well as digital interface units (Digital Interface Unit), ie Multiplex connections (30 channels, each 64 kbit / s) with the operating modes exchange and cross traffic with ISDN signaling, cross traffic with channel-associated signaling.

All SLM 11 peripheral modules. . ., TM 11 . . . have the same system internal interfaces. You couple the individual base channels B, on which user data, ie voice and / or data information is transmitted, to any selection from two multiplex channels (highways) with, for example, 32 channels of the switching network SN and transfer the signaling information transmitted in a control channel D as HDLC protocol to the CC controller. The commands generated according to the invention by the first or two terminal T 1 , T 2 by means of a first switching means S 1 , which is assigned to T 1 , or by means of a second switching means S 2 , which is assigned to T 2 , are from the respective one Terminal converted into incentive signals that the respective control channels D are supplied to the control unit CC. Each peripheral module has a control PBC 11 . . . on, whose task it is, assigned connection channels to selected channels of the multiplex channels, possibly in cooperation with a controller AEST 1 . . . an associated connection unit AE 1 . . . assign.

Several peripheral modules can be functionally combined to form a connection unit AE. Each connection unit AE 1 . . . AEn, AEn + 1 is a control AEST 1 . . . assigned and connected to the switching network SN via, for example, four voice data multiplex channels. The message exchange between the peripheral modules and the control CC takes place via a signaling channel, which is designated in FIG. 1 with the reference symbol HDLC, in the known HDLC point-to-multipoint method.

Multiple connection units AE 1 . . . AEn can be assigned a so-called service unit SU. This includes a signaling unit SIU and possibly a conference device CONF. The signaling unit SIU takes over the supply of characters to the system with audible tones and, where appropriate, with announcements, as well as the reception of DTMF clock dialing signals and dialing tones. This function is realized in a manner known per se with signal processors.

The signaling unit SIU is over two voice data mul tiplex channels with fixed function assignment with the switching network SN connected.

The telecommunication private branch exchange can be a known con have CONF, the conference connections,  d. H. the connection of at least three participants, as well as the Enable "call waiting" and "intrusion" features.

The switching network SN is preferably modular and be stands for example from a non-blocking time step for 16 voice data multiplex channels. By connecting two Such basic modules result in a coupling stage for 1024 times (32 multiplex channels of 32 channels each). The in this Wei se formed non-blocking time step connects from each 32 incoming and outgoing multiplex channels for voice or Data any two of the 32 time slots with each other. No Ben 1-channel connections can also establish broadband connections be put.

The control unit CC takes over the processing related processing that occurs in accordance with the peripheral structure. It consists of a data processor DP, a processor for signaling control DCL, a clock generator PCG, a memory CMEM and an interface processor IP, which is connected to an operational unit, not shown in FIG. 1. The memory CMEM contains the terminal and connection state-specific “call stores” CS 1 described below with reference to FIG. 2. . . and a database, not shown, with configuration data. The components mentioned are connected to one another via a multibus MB, as shown in FIG. 1.

Processors are preferably used for the data processor DP Series SAB8086 / 80286 (company Siemens) used. The memory CMEM contains highly integrated dynamic RAM modules and Feh correction circuits.

The processor DCL for signaling control is used to process the HDLC protocol from the connection units AE 1 . . . AEn + 1 and the service unit SU.

The clock generator PCG provides the clock supply for the telecommunications private branch exchange through.  

The reference symbol " 1 " indicates a first connection between T 1 and T 2 , which was initially in the conversation state ( FIG. 2a), then in the hold state ( FIG. 2b) and finally again in the conversation state ( FIG. 2c) . During the hold state of the first telephone connection 1 , a second telephone connection 2 is established between T 1 and T 3 ( FIG. 2b). These processes are explained in the following.

The operating program of the control unit CC and the circuit-technical construction of the private branch exchange can be designed in such a way that a temporary memory, a so-called "call store", is assigned to each terminal at times in which the respective handset is actuated. These terminal-specific memories can have, for example, at least three memory locations, into which a first, second and / or third identifier for terminals is written by the control unit CC, depending on the connection state. Such structured memory are shown in Fig. 2. The uppermost storage location serves to hold an identifier for the terminal to which the respective memory is assigned. FIG. 2a shows two "call stores" CS 1 and CS 2 , where the memory CS 1 is assigned to a first terminal T 1 and the second memory CS 2 to a second terminal T 2 . This assignment consists in the period in which the handset of the respective end device is actuated, that is, off-hook. Fig. 2a shows the memory CS 1 and CS 2 at a time in which there is a (first) compound / call state between the first terminal T1 and the second terminal T 2. In the top position of each memory, the identifier CRS T 1 or CRS T 2 of the assigned terminal T 1 or T 2 is written ; In the second position, the identifier CRS T 2 or CRS T 1 of the respective other terminal T 2 or T 1 , with which the call state exists within the first connection ( 1 , FIG. 1), is inscribed. The lowest storage location, the function of which will be explained with reference to FIG. 2b, is not occupied when two terminals are in a call state.

In Fig. 2b three "Call stores" CS 1, CS 2, CS 3 are shown for the first terminal T 1, the second terminal T 2, and a third terminal T 3. The three memories shown in Fig. 2b show the connection state in which the first terminal T 1 in a manner known per se establishes a query connection to the third terminal T 3 and thus ver the second terminal T 2 in the frame of the first telephone connection in a hold state has set. The query status to the third terminal T 3 and thus the realization of the hold status of the second terminal T 2 is triggered in a manner known per se by entering a first command into the internal terminal T 1 . The input of this command occurs, for example, by actuating a switching means S 1 , which can be formed in particular by a function key on the terminal T 1 , and by dialing the corresponding number of the third terminal T 3 .

The hold status of a specific terminal with respect to a further specific terminal is identified in the "call stores" by an entry of the corresponding terminal, here T 1 and T 2 . In the example shown in FIG. 2b, as the schematically illustrated memory CS 2 shows, the second terminal T 2 is in the hold state with respect to T 1 ; the second terminal T 2 has, as the middle, empty memory location indicates, no "B-subscriber". As the memory CS 1 shown schematically in FIG. 2 b shows, the first terminal T 1 is in the conversation state with the third terminal T 3 , the identifier CRS T 3 of which is written in the (middle position in the memory CS 1 ). The lowest position of the memory CS 1 , in which the identifier CRS T 2 is written for the second terminal T 2 , indicates that T 2 is in the hold state with respect to T 1 . Of the third terminal T 3 allocated memory CS 3 contains in the first and second position depending on an identifier, while the lower position is not occupied. In the first position, the identifier CRS T 3 is written for the third terminal T 3 to which the memory CS 3 is assigned. The identifier of the second terminal T 2 is written in the middle position of the memory CS 3 . T 3 is thus in conversation with T 2 .

The control unit CC triggers a second command, which is entered into the internal terminal T 1 , in particular by actuating the first switching means S 1 , the second telephone connection (T 3 -T 1 ) and moves the first telephone connection between the first internal terminal T 1 and the second terminal T 2 in turn in the conversation state. This connection state is shown in FIG. 2c and is identical to the initial state shown in FIG. 2a. The assignment of the third terminal T 3 to the memory CS 3 is ended.

According to the invention the program-controlled telephone private branch exchange in a manner designed that it allows, in the illustrated in Fig. 2b connection state of the second located in the holding state terminal T 2 to trigger the formation of an attention signal and the atten formed samkeitssignal the first terminal T 1, which in itself Consultation status (second telephone connection) is to be fed. For this purpose, the second terminal T 2 has a second switching means S 2 , which is formed in particular by a function key. If the second internal terminal T 2 is already assigned the "call waiting" feature in other connection states (busy state of an internal terminal called by T 2 ), this may be the same function key. The second command contains, in particular, an identifier of the second terminal T 2 and an identifier which denotes the "call waiting request" of the terminal T 2 . As soon as the signal formed by the second command arrives, the control unit CC checks whether the second terminal T 2 is authorized to the command specified in the command part of the signal. For this purpose, the control unit CC accesses a database of the private branch exchange, not shown in the figures, in which the authorizations for each terminal are stored. If this check shows that the second terminal T 2 is assigned a call waiting authorization, the current connection status of T 2 is also checked. For this purpose, the control unit CC accesses the memory CS 2 shown in FIG. 2b and recognizes the hold state of T 2 with respect to T 1 . If, as provided here, a call waiting authorization for a specific internal terminal (here T 2 ) can also be activated from the hold state, the control unit CC initiates the generation of an attention signal (“call waiting signal”) in a manner known per se and passes this to the first terminal T 1 to, the address of which corresponds to the identifier contained in CS 2 or can be derived from this by accessing a corresponding table.

The attention signal supplied to the first internal terminal T 1 can be represented acoustically and / or optically in a manner known per se on a corresponding optical display device of the first internal terminal T 1 . For example, the subscriber name assigned to the second internal terminal T 2 is shown on the display of the terminal T 1 , possibly together with an indication of the hold state or the request of T 2 to reset the first connection to the conversation state.

Claims (1)

Program-controlled telephone private branch exchange with a control unit (CC) which, in addition to switching processes for establishing internal telephone connections between internal terminals or external telephone connections between at least one internal and at least one external terminal, is triggered by a first internal terminal (T 1 ), which is involved in a first internal or in a first external telephone connection ( 1 ), a first command which can be input is a second internal or a second external telephone connection ( 2 ) to a third terminal (T 3 ) which is not involved in the first internal or external telephone connection manufactured and thereby the original first Telefunikver connection ( 1 ) between the first internal terminal (T 1 ) and the second internal or external terminal (T 2 ) from the conversation status was put on hold, the control unit (CC) triggered by a second command who in the the first internal terminal (T 1 ) is entered, the second telephone connection ( 2 ) is released and the first telephone connection ( 1 ) between the first internal terminal (T 1 ) and the second internal terminal (T 2 ) is again set into the conversation state, characterized that the control unit (CC) during the hold state of the first call (1) triggered by a third, in the second internal terminal (T 2) enterable command creates a atten samskeitszeichensignal and that the first internal terminal feeds (T 1).