DE1007384B - Circuit arrangement for telecommunication systems, in particular telephone extension systems - Google Patents

Description

GERMAN

The invention relates to a circuit arrangement for telecommunications, in particular telephone branch exchange systems with facilities for monitoring particularly chargeable calls and participants with different authorized official traffic.

In a known arrangement, charge recording devices are assigned to each exchange line, who register the information required to record the respective call charge. Since chargeable, so-called long-distance calls are low in percentage terms, such arrangements result in a great effort and are therefore economically unprofitable. Another arrangement therefore only looks for a certain number of trunk lines such charge metering devices, whereby these trunk lines can only be reached via a special code number can be. In addition to a cumbersome operation, this also reduces the Dialing range of a dialing system, as two code numbers are required for calls in a traffic facility are. These trunk lines can also be used for both local and long-distance traffic are used, it can happen that when dialing the remote code these lines are already through a outgoing local call are busy.

In another arrangement known for public telephone systems, billing devices are used switched on via special mixer selector if required. As in such systems, this billing device must absorb the dialing pulses required to build the invention is at this known arrangement the connection path associated with a rush repeater, which up to Connection of a billing device records incoming number batches and their forwarding is delayed until the connection of the fee recording device is completed. Apart from the special expenditure on switching means for each connection path, such an arrangement can be used Do not use in private branch exchanges, as there are additional tasks here, which does not meet this order. So should the connection of a Charging device only take place if a subscriber authorized for long-distance connections establishes such a connection. Furthermore, the recording of charges should be carried out during the call can be made and not, as in the known arrangement, the connection after the call is held until the due ZM current surges are transmitted to the participant.

The invention avoids the above-mentioned disadvantages of the known arrangements and allows for Choice of the identification of a chargeable circuit arrangement

for telecommunications systems, in particular

Telephone PBXs

Applicant:

Standard Elektrik Aktiengesellschaft,
Stuttgart-Zuffenhausen,
Hellmuth-Hirth-Str. 42

Alfred Heyduck, Stuttgart-Zuffenhausen,
has been named as the inventor

Connection the connection to all connection lines jointly assigned billing devices to display the respective fee. This is achieved by the fact that after the one

^a 5 remote connection characterizing criterion, depending on the authorization of the subscriber, a monitoring device accessible to all connection lines for connection to the occupied connection line is started via switching means.

According to a further embodiment of the invention, after the monitoring device has been connected to a connecting line, an individual counting of the conversation conducted on the connecting line takes place, and at the same time a counter is operated by the subscriber himself. The monitoring devices jointly assigned to all connecting lines indicate the call status and call end ¹ . According to a further embodiment of the invention, after the end of the call, by activating a switching center, the subscriber, both the occupied exchange line and the monitoring device connected to this exchange line, are identified. This identification is done by lamps that are made to flicker in the same rhythm

4-5 and otherwise for other purposes in the arrangement are. According to a further embodiment of the invention, after connecting the for all connecting lines jointly provided monitoring devices switching means to the effect

so brought that in the connection line a high frequency barrier turn on. If all monitoring devices are occupied, there is a return signal given to the identification device, whereby a separation of the participant is initiated.

709 507/169

The invention will now be described in more detail with reference to the embodiment shown in FIGS.

Desires z. B. a subscriber to set up a chargeable connection, he occupies a connection line in a known manner. If this subscriber is entitled to make calls that are subject to charges, an authorization identifier is automatically given in a known manner when the line dialer AW is occupied, whereby relay B responds and maintains its own contact bl . A follow-up drive MW assigned to the connecting line or connected in each case takes up the selection required for the elimination. The relay A provided in the office transmission serves as a feed and current impulse relay and actuates the follow-up device MW via its contact a I and a contact ν I. If long-distance traffic is reached beyond decade 0, the follow-up device is set to 0 while the voters of the office are set at the same time. Since it is a participant who can make chargeable calls, the contacts b II and b III are switched. A free monitoring device in which relay C is energized is assigned via contact & II, u III by setting the follow-up mechanism to 0. The selector magnet D is switched on via contact el and the starter line switched off. The following test path is established for the elector of the monitoring device:

Earth, arm of the follow-up voter mwl, bill, U (I), u I, voter arm d of the monitoring device, c II, 5 (1), -.

Relay B of the monitoring device and relay U of the trunk transmission are energized. Via contact / »V the lamp ZÜL lights up to indicate that the counter ^ Z is in operation. Contact / »I stops the selector Γ of the monitoring device, and Contacts interrupts the circuit for relay C, which drops out. Relay P (II) is maintained via contact / »IV. Contact p III puts relay H (I) preparatory to arm c of selector D of the monitoring device. Relay U is held by its second winding via contacts ν II, ίίΙΙ. The relay H is short-circuited by contact wll. A high-frequency choke is placed in the voice line via contact «IV in order to allow the incoming counting current surges only to reach the receiving element E of the counting add-on. After further establishing the connection and reporting the remote subscriber, the outside of the audibility limit, z. B. 16 kHz, lying counting current surges to the receiving element E of the additional counting device. With each current surge, the counter is switched by one step through contact el and contact as of this counter is over

WiT., C II, arm d of the voter D, wl, c-wire of the public line voter AW, TZ ₁ -

a participant counter is also actuated. At the end of the conversation, the participant hangs up the phone. Relay A and then relay V are de-energized. When contact ν II drops out, "relay H of the counter add-on is actuated. Contact h I switches a flickering signal to the ZÜL lamp. The operator receives a signal that the conversation for counter AZ of the monitoring device has ended. The officer then presses the control button TK. The monitoring lamp ÜL of the connection line and a subscriber lamp TL (Fig. 3) flicker in the same rhythm. This allows the officer to recognize which monitoring device or which counter was connected to which connection line and which subscriber pressed briefly, whereby the general monitoring device and the connection line are released.

Fig. 2 shows the possibility of how an unauthorized subscriber who is trying to make a chargeable call is discarded. Relay B would not have responded in this case, so that after selecting the number 0 and setting the follow-up mechanism via the non-actuated contacts of the authorization relay & III, a switching means (not shown) via the drop line Ab. Ltg comes into effect and discards the subscriber. On the other hand, if the monitoring devices are all occupied, a return signal is sent to the tracking device, which activates the connection line by responding to the relay Ab . A busy signal is transmitted to the subscribers in a known manner.

Claims (8)

Patent claims: 1. Circuit arrangement for telecommunications, in particular telephone branch exchange systems with facilities for monitoring particularly chargeable connections and participants with . differently authorized official traffic, characterized in that after the criterion (digits) characterizing a remote connection has been issued, depending on the authorization of the subscriber, a monitoring device accessible to all connection lines via switching means (MW) for connection to the busy connection line is started. 2. Circuit arrangement according to claim 1, characterized in that after a monitoring device is connected to a connecting line, an individual count (AZ) of the conversation on the connecting line takes place and a counter (Ts) is operated at the subscriber at the same time. 3. Circuit arrangement according to claim 1 and 2, characterized in that the call status and end of call (ZÜL) are identified in the monitoring devices jointly assigned to all connecting lines. 4. Circuit arrangement according to claim 1 to 3, characterized in that after the end of the call by actuating a switching means (Tk) of the subscriber, both the busy trunk and the monitoring device connected to this trunk (TL, ÜL, ZÜL) are identified ·. 5. Circuit arrangement according to Claim 4, characterized in that the lamps (TL, ÜL, ZÜL) which produce the marking flicker in the same rhythm. 6. Circuit arrangement according to claim 1 and 5, characterized in that the trunk line The characteristic monitoring lamps otherwise serve other purposes. 7. Circuit arrangement according to Claim 1, characterized in that after the monitoring devices (U) of the connecting line are connected to the jointly provided monitoring devices for all connecting lines, a high-frequency barrier (HD) is switched on. 8. Circuit arrangement according to claim 1 to 7, characterized in that according to the marking a chargeable connection and the presence of the available monitoring equipment (Fig. 2) a return signal for identification Drawing device (MW) transferred, and the separation of the subscriber is caused. Publications considered: German Patent No. 862 771. 1 sheet of drawings © 709 507/169 4.57