DE1203832B - Circuit arrangement for a portable telephone exchange - Google Patents

Description

FEDERAL REPUBLIC OF GERMANY

GERMAN

PATENT OFFICE

EDITORIAL

Int. CL:

Number:
File number:
Registration date:
Display day:

HOIh

H 04m

German class: 21 a3 - 22/01

T 26214 VIII a / 21 a3

May 16, 1964

October 28, 1965

Applicant:

Telefunken

Patent collecting society m. B. H., Ulm / Danube, Elisabethenstr. 3

Named as inventor:

Norbert Budnik, Backnang (Württ.)

The invention relates to a circuit arrangement for a transportable

for a portable telephone dial-up network. .. ,,. ^,,

system in which the interconnection of the speech paths telephone dialing system

two-wire without control wire to be switched through individually via multi-armature relays with inverse contact 5

clock actuation according to the German patent 1109 217 formed voters takes place in which a Part of the individual switches for several inputs and the remaining individual switches for selection switching be exploited. ok

The invention is based on the object of a
To create a small portable and easy-to-maintain telephone system that is reliable in operation even with rough handling. She should
despite unusually low material costs and 15
small dimensions have properties such as
they are usually found on stationary telephone systems. 2

It is used, for example, by British patent specification 909 962 or by the German Ausleger 20 or the second four contact banks font 1147 272 known to be in coordinate selectors.

multiple use by dividing the con This well-known principle of the simple Umschaltaktfedern the individual switch to several entrances is to be made in the switching system according to the requirements and then other individual switches for the finding expanded to the effect that a selection for each or switching between the inputs of the 25 gear only two contact springs are used, it will to use multiple used single switches. So every single switch with four only two-wire on-es is wired without a multi-core gear. It must then be known for Switching through the inputs, the number of which are used. The selection four individual switches are used, see above increases. that only eight individual switches with two-wire inputs

The telephone system described here can be provided with. You get one like that the voter as a voter through the German patent specification with 4 · 8 = 32 inputs and an Aus-1109 217 well-known multi-armature relays with invergang. By using several multi-anchor adhesives Contact actuation used.

With these multi-armature relays, when an individual switch is operated, the associated 35
ten movable contact springs pressed against rigidly arranged contact banks. For example, if a multi-armature relay has twelve individual switches, each
eight contacts on, so it can be called an eight-wire
Voters with twelve inputs and one output save on individual switches that are invented. However, it can also be carried out, as already mentioned above, and it is mentioned, by doing without the eight-wire through- despite the lack of the individual control wires, the number of inputs achieved in the circuit through the so-called dialing exchanges usual properties, called simple, double or multiple order The invention is characterized in that in

circuit can be increased. In the 45, every voter will speak one through all of the individual counters Patent 1143 237 described going auxiliary contact bank is provided whose Selector uses the aforementioned multi-armature relay, contacts of the same name in a manner known per se and four out of ten contacts are wired four times across all voters Individual switches with one input each are wired and - after the first digit has been switched through that you have a total of twenty four-wire ones corresponding to 50 and thus the selection changeover gears receives, while the remaining two individual switches and after switch for the selection among the first four would take the second selected digit - a

relay in a selector, the number of inputs can be increased accordingly.

However, there is then no special control wire for forwarding the occupancy indicator and the other common switching indicators. But precisely because of this increase in the number the connections associated advantageous considerable

a free test facility to the auxiliary contact bank of the free testing multi-armature relay applied test potential through the contact combination feed certain test ports individually assigned to the second selected number to a test circuit, if the connection to be assigned is already busy, its repeated assignment prevented.

The invention is illustrated in the circuit diagram of a part of a transportable Dialing system explained. It will be the arrangement of a multiple for the incoming Direction shown in which it is checked whether the desired subscriber is busy outgoing or incoming is. The voter arrangement shown is designed for 4 * 8 = 32 subscriber lines, it can naturally apply to multiples of this or to other numbers of participants.

The circuit diagram shows two selectors OHS1 and OHS1 which are multiply connected to one another and designed as multi-armature stick relays. Each contains for the connection of the speech wires h four contact banks al to a 4 and contactor banks, not shown here four bl to b4 and an auxiliary contact bank. A connection set VS with a dial receptacle Reg and a free checking device Pr is provided for each dial set.

The contacts assigned to each contact bank are labeled with the numbers 1 to 12. In each voter, the contacts with the same digits belong to a single switch or contact set. Each individual switch has a set of nine contacts. The contact sets 1 to 4 are assigned to the selection arrangement, the contact sets 5 to 12 are assigned to the subscriber stations. The contacts 5 to 12 of the contact banks α and b of a selector OHS are multiplied with the respective corresponding contacts of the other voters OHS of the same selector set and are connected to the subscriber stations TIn via the subscriber connection circuits not shown here. For the selection arrangement, on the other hand, in each selector for the contact banks α and b, the contacts 1 of the banks al and bl with the contacts 2 of the banks al and bl as well as with the contacts 3 and 4 of the banks a 3 and & 3 or ß4 and ö4 connected.

If, for example, the individual switches 4 and 11 in the selector OHS1 are actuated, the output of the connection set VS1 is connected to the subscriber station TIn 47 via the contact banks la4 or 164.

The connection setup between any subscriber TIn χ, for example with the subscriber station TIn 47, takes place in the manner described below. After picking up his handset, the subscriber TIn χ is assigned a free connection set, for example the connection set VS1 , via the input switching network EKF , from where he receives the dial tone. After dialing the first digit, here it is the "four", the coil of the fourth individual switch is excited by the connection set VSl in the selector set OHSl assigned to it, and this causes the springs of the contact set 4 to move to the associated contact banks lh, IaI . . . Ia4, IbI. . . Ib4 pressed. As a second dialing digit participants Tlnx selects the "seven", which is taken in the choice of recording Reg connection set VSI and processed. The free test device Pr of the connection set VSl then applies the test potential to the auxiliary contact bank lh, which reaches the contacts 4 of the auxiliary contact banks of the other selector sets OHS via the closed contact 4, i.e. also to the selector set OHSl. It is assumed that the subscriber TIn 47 is already occupied by the dialer set OHS1 , so the individual switches 4 and 11 are closed there. The test potential of the contact bank lh then reaches through the associated contact 4 to the auxiliary contact bank lh and from there through the associated contact 11, through the resistor .R11 to the gate diodes DIl and DW. The test potential could flow through the gate diode D11 so that the evaluation device M does not respond. However, if the gate diode D 11 assigned to the selected second digit receives blocking potential via the folder Ord , the evaluation device M responds and reports the busy status of the selected subscriber. This causes the connection set VS1 to refrain from switching through, to send the busy tone to the subscriber Tlnx and to trigger the individual switch 4 of the selector OHS1 that has already been switched through again.

If, on the other hand, the desired subscriber 77 «47 is free, the test potential cannot reach the gate circuit RU, DI1, DW and the evaluation device M does not respond. The connection set VS1 actuates the individual switch 11 of the selector OHS1 and sends the call signal or the microphone feed current to the subscriber 77-47 via the connected path.

If, for example, the evaluation device M, the folder Ord and the gate circuit R, D, D 'are only available once for all connection sets VS and for all selector sets OHS , it is known that only one connection set VS is allowed to carry out a free check and connection at a time.

Claims (1)

Claim: Circuit arrangement for a portable telephone exchange, in which the two-wire speech paths are switched through without individually switching control wires via selectors formed from multi-anchor relays with inverse contact actuation according to German patent specification 1109 217, in which some of the individual switches are used for several inputs and the remaining individual switches are used for selection switching are, characterized in that in each selector an auxiliary contact bank (lh, lh) through all individual switches is provided, whose contacts of the same name (1 to 4 and 5 to 12) are wired multiple times in a manner known per se across all voters and - after switching through the individual switch (1 to 4) corresponding to the first digit and thus causing the selection changeover and after recording the second selected digit - a free test device (Pr) to the auxiliary contact bank (lh) of the free-testing multi-anchor stick relay s (OHSl) applied test potential to a test port (RU ₁ DU and DW) of a test- n ^ ? nwf ? ·? ' ^DS T ^d - ^D5 'vn ^Considering S ^ez ° g ^ene publications: , D12 and D 12 '), which in case ⁶ an existing occupied state of the German Auslegeschriften Nr. 1143237,1147272; legend connection (e.g. TInAT) its still British patent specification No. 909 962; one-time occupancy prevented. 5 SEG-Nachrichten, 1957, issue 3, pp. 123 to 129. 1 sheet of drawings 509 719/88 10.65 © Bundesdruckerei Berlin