DE1036325B - Circuit arrangement for connecting incoming lines to common facilities under the influence of test multiples that prevent double connections in telecommunications, in particular telephone systems - Google Patents

Description

GERMAN

The main patent application relates to a circuit arrangement for connecting incoming Lines to common facilities under the influence of test multiples preventing double connections. According to the main patent application, a common for several connection preparation relays is parallel to a resistor is dimensioned such that a capacitor removed from it Current surge (charging or discharging current surge) only ensures the response of one of the relays, but is not sufficient, in order to effectively excite several preparation relays that are switched on at the same time. One after that Response of a preparation relay activated common auxiliary relay interrupts the capacitor circuit.

An arrangement according to the main patent application can be used with advantage in systems in which the operating voltages are subject to small tolerances, such as B. in public telephone systems. In systems in which the tolerances for the operating voltages, on the other hand, are not chosen so tight are, such as B. in private systems where the operating voltages are taken from the network and in which other known test multiple circuits can no longer be used, also comes across the Dimensioning of a test multiple circuit according to the main patent application for difficulties.

The object of the invention is to eliminate the difficulties mentioned. This is achieved by that the switch-on preparation relay switches on when two or more switch-on preparation relays respond blocking relay that becomes effective and prevents through-connection are assigned jointly is.

By jointly assigning a blocking relay to the switch-on preparation relay, in most cases only temporary strong fluctuations in the operating voltage caused Incorrect switching avoided. For public offices where the operating voltages are only within closely selected tolerances fluctuate, one or all of them are superfluous by introducing the blocking relay Subtle dimensioning of the test multiple circuit or an exact comparison of the in the Test multiple circuit provided capacitor, as the blocking relay in rare cases of overlap existing calls takes effect if two switch-on preparation relays respond at the same time.

According to a further embodiment of the invention, the blocking relay is via a parallel connection of each one resistor and one contact each of the through-switching te preparation relay existing series connections excited. It is thereby achieved that the locking circuit arrangement for connection incoming lines to common

Preventing facilities under the influence of double connections

Test multiples in telecommunications, in particular telephone systems

Addition to patent application S 52394 VIII a / 21 a ³ ίο (Auslegesdirift 1 030 886)

Applicant: * 5 Siemens & Halske Aktiengesellschaft,

Berlin and Munich, Munich 2, Wittelsbacherplatz 2

Walter Villmann, Munich, has been named as the inventor

relay is only effectively energized and thus takes effect when two resistors at the same time are parallel in its response circuit, d. H.

₃ "if two preparation relays are addressed at the same time.

In the drawing, an embodiment of the invention is shown, but only those for the invention essential switching elements. So became

z. B. on the representation of the coupling stages detailed in the main patent for switching a No connection from a calling line to a common facility.

In the figure, designations have been used for the switching elements that correspond to those of the main patent application correspond, so that in a simple manner a test multiple circuit according to the present Invention can be inserted into the figures of the main patent application.

The following is based on the drawing of the structure and the mode of operation of an inventive Arrangement will be described in detail.

When there is a call, e.g. B. on the line

Ll of the line group LGl, the contact 2a is «1/1 and thus a test circuit is closed:

I C 11/1, 3,

1. +, 2an 1/1, ...,

8, IQl

809 597/135

In the charging circuit of the capacitor Kr 111 , the preparation relay C11 / 1 responds if further starting contacts, for example the starting contact 7 to 1/0 of the line L10 of the line group LG 1, were not closed at the same time as the starting contact 2an 1/1. If, on the other hand, starting contacts of lines in other line groups are closed, this has no effect on the test multiple circuit assigned to line group LG1. Accordingly, a call can be processed from several line groups at the same time, but only a maximum of a number of calls that does not exceed the number of the groups of facilities.

The monitoring relay Q 1 located in the circuit 1 is on-delayed and with a second Winding II equipped in the self-holding circuit that is closed when relay C11 / 1 is triggered lies:

IC11 / 1, 3, *

_n ", Kr 1/1, 5 * 11

+, 2 to 1/1, .... '

9c 11/1, II C11 / 1, TO, UQl

8, ίρι

The second winding II of the relay Q1 is connected as a counter winding to the winding I, so that the delayed relay Q1 can only respond if no holding circuit for one of the relays C11 / 1 to C11 / 10 is closed, which z. This is the case, for example, if there are two calls within a line group at the same time. However, if circuit 2 becomes effective, relay Q 1 can no longer respond.

The common auxiliary relay ZIl lying in series with the holding winding II of the relay C11 / 1 responds, among other things, opens its contact 5 z 11 and closes its contact 10 2 11. At the contact 5 £ 11, the response winding I of the relay C11 / 1 turned off from the circuit 2 and at the contact 10 ζ 11 a running across the resistor 11 discharge circuit for the capacitor Kr 1/1 is closed.

At contact 12z 11 of the common auxiliary relay ZIl, for example, the connection to a free device is initiated or a test circuit is closed via a test multiple assigned to a further coupling stage.

In circuit 2, in addition to the parallel branches in which the switch-through preparation relay Cll / 1, the monitoring relay U1 and the common auxiliary relay Z11 are switched on, there is another branch which, for the sake of clarity, has not been taken into account in the illustration of circuit 2. After the relay Cll / 1 has responded, in addition to circuit 2, there is also a closed circuit at contact 201c 11/1 for the blocking relay S:

2a. +. 2a »1/1, 201c 11/1, 204, IS, -.

However, the relay S cannot respond in this circuit because it is counter-excited in a closed circuit via its winding 115 ":

3. -K 200, II5 ·, -.

The counter-excitation on the second winding II is chosen so that it is triggered by the response of a Preparatory relay over the first winding I acting excitation is canceled. The one when responding of a preparation relay acting total excitation (excitation via winding I minus the excitation via the winding II) is not sufficient to bring the blocking relay to the pick-up point.

If, however, due to a sudden increase in the operating voltage, two preparation relays, e.g. B. the relays Cll / 1 and C 11/10, two calling lines L 1 and L 10 addressed, the winding I of the blocking relay S is excited via two parallel resistors 204 and 205. The excitation is so dimensioned that it not only cancels the counter-excitation via the winding II, but is sufficient to bring the relay S to pick up.

When it responds, the blocking relay S actuates its contacts 210.?, 211i; by opening its contact 210i, the initiation of further switching operations after the contact 12ζ 1 of the common auxiliary relay Z 1 is closed is prevented. The pick-up times of relays S and Z 1, which are simultaneously excited by the preparation relays, are chosen so that contact 210.? opens before contact 12 s 1 closes.

At contact 211? a circuit is closed via a third winding III of the monitoring relay Q 1:

4. +, 211 s, III Ql, 130, -.

The relay Q 1 responds with a delay and causes z. B. a busy signal to the calling lines, a shutdown of calls and / or a signal to a monitoring device.

Claims (4)

Patent claims: 1. Circuit arrangement for connecting incoming lines to common facilities under the influence of double connections preventing test multiples with a common capacitor for several connection preparation relays according to patent application S 52 394 VIII a / 21 a ^s , characterized in that the connection preparation relay (Cll / 1,. ., C11 / 10) when two or more connection preparation relays (eg Cll / 1 and C11 / 10) are activated, a blocking relay (S) that prevents connection is jointly assigned. 2. Circuit arrangement according to claim 1, characterized in that the blocking relay (S) via a parallel circuit of a resistor (204 or 205) and a contact (201 c 11/1 or 202 c 11/10) of the switching preparation relay (Cll / 1 or C11 / 10) existing series connections is excited. 3. Circuit arrangement according to claim 1 or 2, characterized in that the blocking relay (.S ") is counter-excited via a winding (II) in a closed circuit. 4. Circuit arrangement according to one of claims 1 to 3, characterized in that the blocking relay (S) is a common monitoring relay which becomes effective after one of the switching preparation relays (Cll / 1, ..., C11 / 10) is not switched on when two or more calls are present (Q) affected. 1 sheet of drawings I «09 597/135 8.58