DE1067881B - Circuit arrangement for telephone extension systems with the charge recording devices assigned to the office transmissions - Google Patents

Description

In private branch exchanges with the trunk transmissions associated fee recording devices are • in general only üe for high-quality connections accruing fees can be detected. A differentiation possibility between those for high quality and those for low quality Connections incurred charges is generally given by the fact that the charge pulses for the former during the existence of a connection and for the latter after termination of the connection come in. Arrangements have therefore become known in which the transmission of the tracking pulses to the fee recording device η depending on the state of the feed relay a Vmts transfer is carried out. These arrangements have the disadvantage that they are used in systems in the fee impulses for high-quality calls in the form of multiple counting are also checked Termination of the connection are given, can not be used, since even if the feed ■ elais an office transfer is delayed accordingly, no differentiation between single and multiple counting or between low-quality connections is more possible.

In order to 'avoid this disadvantage of the known arrangements, it is also known to measure the number of incoming charge pulses by means of a clock circuit and to connect the charge detection device to the switching devices influencing it only when two device pulses are present, in which case the charge has already occurred - ^: enen counting pulses can be simulated by the clock circuit. For systems with time pulse counting, η in which several counting pulses arrive for both low-value and high-value connections, the last-mentioned known arrangements cannot be used either, since they can no longer distinguish between the two types of connections.

The invention now relates to a circuit arrangement for private branch exchanges with the charge recording devices assigned to the transmissions, in which the mediation activity of the officer is based on the retrieval of incoming calls, The forwarding of the latter and outgoing established connections as well as the establishment of higher quality connections to be counted limited. In systems of this type, in order to avoid : haste of the previously mentioned known orders should be imposed on the civil servant that they should be set up ; In a high-quality connection, the billing device to the switching means influencing it the corresponding transfer of office has to switch on, but this is not just an additional one Circuit arrangement

for telephone exchange systems

with the billing devices associated with the office transfers

Applicant:

Siemens & Halske Aktiengesellschaft,

Berlin and Munich,
Munich 2, Wittelsbacherplatz 2

Wilhelm Kurz, Munich,
has been named as the inventor

Switching action for the officer would represent, but could also lead to incorrect switching.

The object of the invention is to avoid these disadvantages and the disadvantages of the known arrangements. This is achieved by the fact that the fee recording devices are connected to those influencing them Switching means of a transfer of office are automatically switched on when the officer connects to this transfer of office and before the transfer of office the connection of the officer was not occupied. In an arrangement according to the invention, so the charge detection device of an official transfer only to those influencing it Switching means switched on when the official transfer found free when the officer was occupied if the officer wants to establish a high-quality connection for a participant. In the Querying of calls and when entering a connection, on the other hand, does not switch on the Billing device. With the invention is a clear way of differentiating between high and Given low-value compounds, which can of course be used in all systems, in where only the high-quality connections are established by the officer.

An exemplary embodiment of the invention is shown in the drawing. However, only those for the invention essential switching means of the switchboard and an office transfer.

With reference to the drawing, the structure and mode of operation of an arrangement according to the invention are shown below will be described in detail.

909 640/106

At the official's place Pe, a switch-on button with a contact at is provided for each office transfer AUe, and when this button is pressed, the connection of the place to the office transfer is initiated. The connection relay As responds via the contact lsp of a blocking relay Sp of the office transmission.

A relay B indicates the state of the exchange transmission AUe. It is excited when the delegation is busy and de-excited when it is free. If the exchange is free · at the time the place is switched on, when the contact at closes, a relay E parallel to the relay As is energized via the contact 2 &. By closing its contact 3 c, the relay £ prepares a holding circuit via its winding II, which is closed by contact 4 δ when the relay B, which characterizes the occupied state, is triggered. At the same time, contact 2 b opens the response circuit for relay .E. If the relay B was already energized before the place was connected to the exchange transmission and accordingly the exchange transmission was already occupied, the relay E via its winding I cannot respond.

The relay E is used to connect the charge meter GZ to the latter influencing switching means, ie to the contact 5 z of the relay Z. The latter is in a known manner on the charge switch of the exchange line and picks up the incoming charge pulses.

With each charge pulse, the charge meter GZ speaks via contacts 5 ζ and 6 e. With the first pulse, a blocking relay Sp is switched on at the same time, the winding I of which was connected to a contact 7 b of the relay B, which characterizes the occupied state, in parallel with the charge meter GZ . When it responds , the relay Sp closes its contact 8sp and is thus placed in a holding circuit which is only dependent on the counter reset button rt assigned to the charge counter GZ. The blocking relay Sp masters the triggering of the official transmission, so that the latter can only be occupied again when the officer has read the charge counter GZ and pressed the counter reset button rt .

Claims (2)

Patent claims: 1. Circuit arrangement for telephone extension systems with the official transmissions assigned fee recording devices, in which the switching activity of the civil servant is limited to the querying of incoming calls, the forwarding of the latter and outgoing established connections as well as the establishment of high-quality connections to be counted, characterized in that the fee recording devices {GZ, Sp) to the switching means influencing them (relay Z, contact 5 z) of an official transmission (AUe) are automatically switched on if the officer connects to this official transmission and the official transmission was not occupied before the official was switched on. 2. Circuit arrangement according to claim 1, characterized in that one of the connection of the fee recording device (GZ, Sp) to the latter influencing switching means (relay Z, contact 5 a :) serving relay (E) under the influence of the switch-on button (contact at) and is under the influence of a relay (B) which characterizes the state of the exchange transmission (AUe) . Considered publications:
German Patent No. 1,002,408;
German patent application T 11042 (published July 5, 1956). 1 sheet of drawings © 909 640/106 10.59