DE976544C - Circuit arrangement for telephone extension systems - Google Patents

Description

With the introduction of the self-dialing service, there are also new ones for private branch exchanges Problems. From the possibility that in the future from every officially authorized intercom of a private branch exchange If remote connections can be established automatically without using the remote station, it becomes necessary to establish such connections by the operator of the private branch exchange to monitor the to be able to determine the fee due for a call. The summary known from private branch exchanges Acquisition of the charge units for trunk connections assigned by the trunk lines Counter does not do justice to this task, because it does not do the job for each individual conversation Accrued fee units can be determined. ■: The invention relates to a circuit arrangement for private branch exchanges for billing Particularly compulsory connections (Fernverbin- ao fertilize), in which counter current surges during the The existence of the voice connection is transmitted, and provides for an arrangement that allows the Operator of the private branch exchange enables the charges for each call as of this kind. It achieves this by the fact that the after production of a particularly obligatory Connection (remote connection) incoming counting pulse switching means that controls the counting pulse in a counting device or the like of the office connection

309 732/3

Register the call record and switch on the display and release the exchange call record depending on a switching action by the operator of the operator console bring. Such an arrangement gives the operator the option of reading the Meter reading at the beginning and at the end of a long-distance call, the number of charge units that have accrued to determine and also to determine the call station ίο from which the connection was established became.

The invention can be understood more clearly with reference to the exemplary embodiments shown in the drawings. This is essentially the case around the operator station and the associated office transfers, one of which is shown in excerpts in FIG. 1 is shown, with all insignificant details of the circuit arrangement omitted are.

It is assumed that a subscriber Tl-x has an outgoing connection, e.g. B. remote connection has established. The feed relay A in the exchange transmission and the relays R and T in the subscriber circuit are picked up. The official loop is held via the contact α-IV. As soon as the connection is established, the first counting pulse is transmitted from the exchange facility VStW backwards to the exchange transmission AÜ. Relay E takes this up in the exchange. Via a contact el , a meter assigned to this exchange line and located at the operator station receives the first incremental pulse:

+, el, za, -.

In addition, relay A ι is actuated via contact el:

+, el, ατ Π, Α ι (I), W, -.

The relay A 1 is held by a second winding depending on a contact d II:

+, NU, LT, rf II, α. ι III, A ι (II), -.

The contact α I in the test wire is bridged by a contact ail. This makes it possible that the relays R and T continue to hold in the test wire regardless of whether the subscriber continues to hold his handset or hangs up and thus the relay A drops. This means that the connection is not released in the private branch exchange either. When relay A 1 is triggered, a signal lamp ÜL lights up at the attendant console:

+, NU, LT, ÜL, α ι IV, dl, 61II, -.

This signal lamp is on for the duration of the conversation.

If the extension subscriber has ended his call, the feed relay A drops out in the known manner. Relay C is actuated via a contact »HI and a contact & of a relay B that is still held but not shown:

+, intermediate contacts, b, »III, U ₁ el, C ₁ -.

Relay C responds and maintains its own contact depending on a delete button LT:

+, NU ₁ LT ₁ Cl ₁ C, -.

The circuit for the signal lamp is switched by the contact he II and thus on Flicker signal triggered:

-, / Z (i), dl, αϊ IV, ÜL, LT, NU, +.

The end of the call is indicated to the operator by the flickering signal. As a result, she is able to read the counter at the moment the lamp is switched on and the lamp is switched to flickering. If you want to find out which subscriber has made the call, you press the subscriber lock key FT and thus brings a relay D to respond:

+, NU ₁ LT ₁ FT ₁ D ₁ -.

As already mentioned, the relay A 1 is thrown off by a contact d II of this relay. However, the relays R and T are kept in the test circuit, since a contact dl keeps the circuit closed for the duration of the actuation of the button. At the same time, increased voltage is applied via contacts dlV and dV to the a / b wires of the subscriber line to which a glow lamp GIx assigned to the subscriber is switched on. It should be noted that such a glow lamp is assigned to each subscriber and that all glow lamps are combined in a panel VP I at the switching station. The operator can determine the subscriber number by lighting up the glow lamp.

The arrangement shown in FIG. 2 can also be used to determine the subscriber number. Each participant is assigned two glow lamps GIx ι, GIx 2, which are connected to the speech wires in series with one another. To ignite a pair of lamps, an increased voltage is also applied to the speech wires.

After releasing the participant locking button, relay D drops out, which disconnects the test circuit. The subscriber relays R and T drop out. The rotary magnet D of the exchange dialer AW runs into the rest position. laa

During the existing connection, the incoming counting pulses are transmitted to the counter through the contact el.

If a subscriber is making a local call, the counting is based on 1 * 5, as is known Ending the conversation, d. i.e., the count

occurs when relay A has dropped out. As a result, the winding I of the relay A ι is short-circuited, so that this relay does not respond. Despite the counting pulse being received in the counter device, there is no signaling by the lamp ÜL.

If a connection established by one subscriber station is to be transferred to another subscriber station, the to changeover relay U, not shown, is activated in the exchange transmission. In order to also identify this measure at the operator station, the relay B ι is made to respond via a contact:

,. +, contacts not shown, b, aiii, u,

The relay maintains its own contact bil depending on a contact

ao of the subscriber detection relay D. The signal circuit is switched to a different flicker frequency by the contact b ι II.

After the subscriber has been determined and the connection has been released, all switching means that are still on hold, such as relay C, are discarded via a delete button LT.

According to this circuit, a signal lamp ÜL, a counter device Za ', a fixed position key FT and delete key LT are provided for each exchange line at the operator station FPII. It is advantageous to combine these keys in a mounting strip. The operator must therefore carry out the following measures: When the signal lamp ÜL lights up and flickers, read the counter reading, press the participant locking button, determine the participant number in the glow lamp panel and note the counter difference and the participant number. After these processes, she then only has to press the delete key, which can possibly be coupled with another key to simplify the circuit.

Claims (6)

PATENT CLAIMS: i. Circuit arrangement for telephone extension systems for the recording of charges for particularly compulsory connections, in which metering current surges are transmitted while the voice connection is in place, characterized in that the metering pulse arriving after a particularly compulsory connection (long-distance connection ) has been established controls switching means (E, Ai) that control the metering pulse a counting device (Za) od. The like. Register the exchange connection set and switch on display means (ÜL) and trigger the exchange connection set as a function of a switching action by the operator of the operator console. 2. Circuit arrangement according to claim 1, characterized in that when a call is terminated or transferred to a connection, switching means (Bi or C ) convey a different display state (ÜL flickering) to the operator. 3. Circuit arrangement according to claim 2, characterized in that the other display state is different depending on whether the connection is abandoned or transferred (different flickering states) . 4. Circuit arrangement according to claim i, characterized in that the normally of the feed and pulse relay (A) of the office connection set dependent test circuit of the office dialer (AW) is brought after the arrival of the first counting pulse depending on switching means (α11, dl) , the can be influenced by switching measures by the operator. 5. Circuit arrangement according to claim 4, characterized in that the test circuit of the exchange dialer (AW) is maintained by switching means (D) which take effect when the subscriber is identified. 6. Circuit arrangement according to claim 4 and 5, characterized in that the separation of the test circuit and thus the release of the exchange connection set when actuated the delete button takes place. Considered publications:
German patent specifications No. 439 249, 685 534, 357- Legacy Patents Considered:
German patents No. 969 176, 972 965. For this purpose, 1 sheet of drawings O 309 732/3 10.63