DE600087C - Circuit arrangement for telephone systems with dialer operation and a paging device - Google Patents

Description

It is known to use voter operated telephone systems by voters with facilities to interconnect that are used to call people, and to provide a call sign group for each person, d. h, a number of callsigns, e.g. B. lamps that are always common in different Rooms, e.g. in the individual rooms of a factory. Any of these Groups can be switched on by dialing their own number. Of the The called party dials a number from any intercom station that is given to him for this purpose assigned. The selector contacts that correspond to this number are marked with the Dialer contacts connected, which the calling party has occupied, so that the called party can be through Dialing establishes a voice connection with the caller.

The number to be dialed by the called party is his for the new facility own participant number and therefore does not require any separate voter contact. the Number of dialer contacts that are used by the call facility for normal speech traffic are therefore only half as large as in the arrangements of those known species.

According to the invention, this is achieved by switching the line selector outputs, which belong to the subscriber line of the called party.

The drawing shows an example of the new arrangement.

I designates a call station from which the system can be used, II is one of the other call stations at which the called party has to report. A is one of the call seekers, B is the line selector belonging to it. C means one of the call seekers of station II, D its line selector. Also shown are a relay E with a double contact e, contacts f, / ^{2 of} the non-illustrated test relay of the selector B, a relay G with a double contact g and contacts h ¹ , h ^{2 of} the non-illustrated test relay of the selector D. A relay / has Contacts j ^{1,; 2} , j ³

A relay K is with

provided a contact k . M denotes a mercury relay, m the mercury tube. Lamps n, which are housed in different rooms, are connected to an alternating current network at N. An alarm clock ο or another audible signal generator can also be arranged in each of these rooms , p, q, r are direct current sources. The relays /, K, M are available several times, namely one for each call position of the selector B.

With regard to the circuit of the parts mentioned, reference is made to the drawing. This shows the idle state of the system.

The mode of action is as follows.

When you pick up the handset at station I, one of the call seekers, e.g. B. A, in a known manner on this call station. It is now assumed that the station I is looking for the station II, the

for example, port number 23 may be assigned. If the station I were to dial this number, the alarm clock at four station of subscriber II would sound in the usual way. However, in order to switch on the paging assigned to this intercom, the intercom I has to dial the paging number assigned to position II, for example 03. As a result, the line selector B is set to the third contact of the tenth decade and a relay connected to the c-wire of this contact is energized. At the same time, the selector's test relay F ( not shown) responds and switches its contacts f ^l and / ² .

With the response of the relay / a switchover is made at the contacts j ¹ , j ² , f , which causes the lines of the line selector associated with the called subscriber 23 to be separated from the lines of the call seeker associated with it and thus also from its own connection line be connected to those lines of the line selector multiple that are connected to contacts 03 of the line selector.

The paging signal assigned to subscriber 23 is switched on ^{at contact j 4.} On the one hand, this contact causes the alarm clock ο to sound and, on the other hand, excites the relay M, which at its contact m switches on the lamps η identifying the called subscriber at the various signal points. JV are the terminals of the power network.

As soon as the called party has noticed the ring signal, it selects the next available his station from (for simplicity, it is assumed that it is the station II) has its own port number, so the no. 23. The connected to the call Finder C line selector D is set to the third contact of the second decade and thereby closes the circuit of relay K , which was already prepared at contact f. Relay K causes the paging signal to be switched off at k. By transferring the contact; ³ has thus been achieved that when setting any line selector, z. B. D, not checked on the contact 23 as usual on the isolating relay assigned to the subscriber 23, but that the relay K causing the disconnection of the paging signal is energized. At the same time, the test relay H, not shown, of the line selector D responds and closes its contacts h ¹ and h ² . As can be seen from the drawing, the communication wheels of the line selectors B and D have been crossed when they are connected via the contacts j ¹ and j ² , so that now the relays E, G are energized, namely on the way: -, E, f ¹ , switch arm of selector B, j ² , switch arm of selector D, h ² , earth or -, G, h ¹ , switch arm of selector D, j ¹ , switch arm of selector B, f, earth. The relays E and G switch their double contacts e and g so that the voice connection between the microphone units I and II is now switched through.

When you hang up the handset at the station II, the RelaisG is in a known manner, for. B. by short circuit, de-energized. The part of the connection between I and II established from position II therefore returns to retirement. As a result, the selector D interrupts the circuit of the relay E running through it, so that the part of the connection established from the point I also collapses. By returning to the rest position, the selectors B and D switch off the relays K and T at the same time.

The relays E and G can be used at the same time to switch the line selector from lifting to turning. The relays E and G are then already de-energized in a known manner after the line selector arms have been raised and thereby initiate the rotation of these arms. The paging contacts can also be connected to the line selector in such a way that their arms only need to be rotated and not lifted in order to reach these contacts. For the connection of the paging device, an additional decade that can be reached without any height increment is then built into the rotary dial. In this case, the relays E and G, in order to initiate the rotation of the switching arms, must be arbitrarily de-energized from the microphone units. For this purpose, the call stations can have an earthing button in a known manner, which, when actuated, affects an auxiliary relay in the exchange, which causes the relays E or G to drop out before the number current impulses are sent out, so that the first series of impulses sent by the call station is the Turning the voter into the additional decade.

Claims (4)

Patent claims: i. Circuit arrangement for telephone systems with dialer operation and a paging device whose call sign groups are set via the dialer, characterized in that in the call position of the line selector (B) the outputs of the line belonging to the subscriber line (II) of the called party. selector (D) can be switched so that the called party cancels the call by dialing his own subscriber number can answer. 2. Circuit arrangement according to claim i, characterized in that after switching on · the paging signal f by relay 7) and subsequent Setting a line selector to the connection number of the called subscriber the busy test of the subscriber line is prevented and a switching device (if) is influenced, which causes the paging signal to be switched off. 3. Circuit arrangement according to claim ι and 2, characterized in that that with the setting of a line selector to the connection number following the activation of the paging signal of the called subscriber initiates the connection to the calling subscriber. 4. Circuit arrangement according to claim i, characterized in that the Paging contacts to an additional decade of the Lifting rotary line selectors are connected and that the immediate preparation of the Solenoid circuit by a special switching action carried out by the participant before dialing (actuation an earthing button). 1 sheet of drawings