DE1250501B - Circuit arrangement for telephone extension systems with central dictation facilities and with dial converters assigned to the office transmissions - Google Patents

Description

FEDERAL REPUBLIC OF GERMANY GERMAN W / THWl PATENT OFFICE

EDITORIAL

Int. CL:

H 04 m

H04q

German KL: 21 a3 - 54/10

Number:
File number:
Registration date:
Display day:

T 30721 VIII a / 21 a3 March 19, 1966 September 21, 1967

It is known to couple private branch exchanges with central dictation facilities, which according to Selection of certain codes is available to the participants of such a system for recording dictations stand. With these arrangements, the telephone subscriber in question is chosen by a specific one Code number via the internal connection devices to such a dictation device switched through.

If telephone subscribers want to record the outside calls made by them, they had to a recording device can be connected individually to the telephone station in question. Via an adapter such dictation or recording devices were switched on, but only such recording devices were available to a limited group of participants. Also for this one However, the small group of participants only made poor use of these relatively expensive ones Dictation facilities.

In order to improve the degree of utilization of such dictation facilities and, above all, all of them Giving subscribers who can make external calls the option of recording the external calls they have made is used by Invention of the central dictation devices that are often already present in private branch exchanges for recording external calls made by subscribers in the private branch exchange. The order according to the invention relates to such telephone exchange systems in which the Trunk transmissions assigned to dial converter for converting touch-tone dialing codes into pulse trains are. In such arrangements, an assigned to the transfer of office is used in the evaluation of a certain touch dialing identifier, the coupling of a switching means that becomes effective free dictation machine to the external line connected to the relevant extension. Appropriate the dial converter assigned to an office transfer has one of the number for the Control of a dictation machine necessary switching operations corresponding number of by touch dial indicator controllable control outputs, which can be connected to a free dictation device to a coupling device performing an exchange transmission to the dictation device that is connected in each case be switched through.

An exemplary embodiment of the invention is shown in the drawing.

The exemplary embodiment only gives the parts of a remote circuit arrangement that are necessary for an understanding of the invention for telephone extension systems with central dictation facilities as well as assigned to the office transmissions Poll converters

Applicant:

Telephone construction and normal time G. m. B. H., Frankfurt / M., Mainzer Landstr. 134-146

Named as _inventors:;

Werner Fleckenstein, Sprendlingen

PBX with a central dictation facility again.

The extension extension A, which has a keypad for issuing the dialing code, is connected in the case of an exchange call via the only indicated couplers TAITB and EK with an exchange transmission ^ 4 f / e, which takes over the supply of extension extension A. As a result, the windings I and II of a feed relay A and a differential relay X are connected to the voice wires, the latter being used to initiate inquiry and transfer connections. The individual stations (ext) have a keypad for issuing the dialing codes, whereby the transmission of these dialing codes up to the exchange transmission AUe takes place according to the diode-earth method, in which one or both wires are connected to earth potential via diodes in different reverse directions at the subscriber stations will. The two possible transmission directions are checked one after the other, this is done by applying low-frequency alternating current in the tactile dial receiver TWE to the two wires of the speech line, the corresponding evaluation relays being polarized by connecting rectifiers with different polarities. Depending on the key pressed, a certain number of four possible receiving relays is activated and thus controls the device, not shown, which converts the individual touch-dial indicators into pulse trains. This is done by pulse-wise drop-out of a pulse relay , which interrupts the loop line that leads to the VStW exchange in the rhythm of the individual pulses.

The central dictation devices are indicated by a dictation device DE , each dictation device DE being preceded by a dictation transmission D-Ue , which

709 648/48

Claims (1)

3 4 subscribers, for example from the extension part with the exchange transmission A Ue interconnected subscriber extension B, can be occupied if this is in. The connection is initially carried out with the help of the dictation device wants to enter a dictation. The contacts kx 2 and kx 3 or kyt and / cy3 for Interconnection of an extension subscriber the speech path that is sent to the transmitter coil ZW of the Ext.B with a dictation transmission D-Ue takes place via 5 trunk transmission A Ue is coupled while the the couplers TA / TB / KJ, which are also used in making contacts / «1 and ky2 on behalf of all internal connections used those coupling contacts that are intended will. are the various control lines from the Via a coupler KD , however, the dial-up receiver TWE can also be switched through to the dictation machine DE animal transmission D-Ue with an office transmission io. These control cores that are interconnected by the A Ue . For this purpose, the local line transformer OLÜ is to be provided with an additional extension A with identification potential, winding ZW , via which the calls on the are broken down into a starting line St, in an on-exchange line, and can be listened to which would take a call announcing wire Λ, 15 a return wire R, a repeat wire W are fed into the dictation device DE that is switched on. The connection of a free dictation as a stop wire Sp. By switching on the transmission D- Ue to an office transmission A Ue speaking potentials to these wires can take over the coupling relays KX and KY, which actuate the activity of the central dictation device on the part of the speaking contacts, from which ext.A are controlled in the extension. The same possibly drawing some are reproduced. Of course, the extensions under the coupling relays KX and KY, ie the subscribers Ext.B, if they are free via the coupler TAITBIKJ mood of the dictation device DE that occupies the dictation device D-JS, and the with an exchange transmission , record dictations in this dictation device to be interconnected with AUe, take over. a tax rate SD, which is available after entering an appropriate 25 If no more free dictation machine DE is available for promising incentives in the transfer of office A Ue is switched on in the transfer of office A Ue to determine this transfer of office and for the busy signal relay BZ , which with its provision of a free dictation device DE winding II via the capacitor Co is briefly induced in. Self-holding is possible. There is a busy signal Has an extension extension B transmitted to extension extension A via coupler 30. This transfer TAITBIKJ a connection to a free dictation of the busy signal is made by means of the contact bz2, transmission D- Ue built up, the relevant one of the busy tone is sent to the transformer winding III Extension extension B from the dictation transmission D-Ue of the feed relay A switches on. fed, as this contains the storage relay / and a Dictation machine DE request for a differential relay XB . While the connection is positive, however, the extension extension A responds to the extension extension Nst.B to the relevant key commands by means of the keypad in the reception transmission D-Ue to the relay 7 and catcher TWE, which opens it the already mentioned control switches on the occupancy relay VB , which transmits itself. with its contact vb 1 in a holding circuit. If the call is to be terminated, see above switches. 40 the request key on the extension extension A. If the extension extension A conducts an outside call, that is, it is actuated again and the relay DA is thereby transferred it is switched via the coupler TAITBjEK with the official one of the winding I in the opposite direction transmission A Ue connected and would like to drop the winding II. To record the relevant conversation, the extension extension A can of course press a previously defined dial key during the conversation. 45 again a dictation device DE for recording The dialing information in question will be requested in touch dialing. However, it is then recognized with the receiver TWE , since each actuation of a high probability another device for the dial button at the point Ext.A is either used for a recording, since there are several dictation drops of the relay A or for an addressing of the device DE at a central point be available. Relay X leads. This means that either via the contact, the relevant extension will avoid that tact al or via the contact * or via different dictation devices for recording both contacts of the tactile dial receiver TWE are occupied and used for the same call, so and presses the corresponding tactile dial indicator a dial button that has the "Stop" criterion. If it is, includes a Tastwahlkennzeichen, that is, during the actuation of the selection key which the connection of a dictation machine DE to 55 is in Tastwahlempfänger TWE the inauguration-office transmission A Ue signaled, so talks about transmission A Ue corresponding stop potential to the winding / the relay DA on. The relay DA line Sp applied. In this case the Dikgo stops via its contact da2 as well as its winding device, ie it does not record any further aftersales III in self-switching, since the relay V is more open at the richt, but still remains at the office assignment of the office transmission A Ue switched on via the 60 transmission A Ue . If other parts were switched on clock al . The contact dal gives the call to be recorded, so a corresponding request to the tax rate at the extension extension A is pressed a dial button, the SD. Which is assigned the meaning »Start« as a rotary selector in the drawing.
posed, but usually working electronically.
Search selector SW searches for the requesting office over- 65 patent claims:
Tragung AUe and causes the activation of the 1st circuit arrangement for telephone secondary coupling relays KX and KY via their windings I, station systems with central dictation devices through which the next free dictation transmission D-Ue and with the office transmissions assigned Dial converters for converting touch dialing codes into pulse trains, characterized in that a switching means (DA) which is assigned to the exchange transmission and which becomes effective when evaluating a certain touch dialing code is used to couple a free dictation device (DE) to the trunk line connected to the relevant extension (Ext.A) (A Ue) is caused. 2. A circuit arrangement according to claim 1, characterized in that the dial converter (TWE ) assigned to an office transmission (A Ue) has one of the number of switching operations necessary for controlling a dictation machine (DE) of control outputs that can be influenced by tactile dialing indicators, which are controlled via the Connection of a free dictation device to a coupling device (KD) performing an exchange transmission to the connected dictation device (DE) . 3. Circuit arrangement according to claim 1 and 2, characterized in that the push-button dialing code causing the connection of a dictation machine to an exchange line performs the shutdown of the dictation machine when it is repeated. 4. Circuit arrangement according to claim 1, characterized in that the interlocking transmitter (OLU) of an office transmission (A Ue) is equipped with an additional winding (ZW) to which the recording and playback devices of the coupled dictation device (DE) which are used for recording and playback of calls ) can be connected. 1 sheet of drawings 709 648/48 9.67 © Bundesdruckerei Berlin