DE430494C - Circuit arrangement for monitoring telephone connections - Google Patents

Description

Circuit arrangement for monitoring telephone connections. in the Main patent 4258o i is a @ c @ aging arrangement under protection, in which when connecting more than two lines, a warning sign is active is set. In the embodiment there is each incoming and outgoing line a special relay that responds to a current of a certain strength is assigned to its Circuit prepared when the line is occupied and after connecting another Line to the established connection is closed.

The present invention aims to simplify the circuit and savings in relays, resistors and lamps. This task is carried out according to the invention solved in the following ways: Each group of lines (incoming and outgoing) is just a single switching device that dominates the warming symbols assigned, which in the case of 'multiple connections via the connection devices is put into action.

Or all outgoing and incoming lines of a workstation only a single switching means is assigned, which is via the connecting devices is actuated and the warning sign both for connections of several incoming Lines with one outgoing and one incoming with several outgoing lines puts into action.

Or only the lines of a @ "direction of traffic is a single one Allocated warning signs dominating switching means and the lines of the other Traffic directions are assigned test facilities, which when a such a line - to an existing connection in a known way impede.

Or the incoming and outgoing lines are separate switching means assigned, via whose contacts a monitoring relay is controlled.

In Figs. I to 6 an embodiment is shown for each case, where only the signal circuits are drawn for the sake of simplicity. the The speech and test lines can be connected using the same connection devices, through which the signal circuits are closed.

In Fig. I a circuit arrangement is illustrated in which the lines ankomnienden a monitoring relay AL, and for emitting a L'l) erwachungsrelais AL. is provided, which set the lamps FL, and FL = in action.

Fig. 2 shows a circuit arrangement as a further embodiment, in which only one for all incoming and outgoing lines Monitoring relay AL is provided, which the circuit of the warning lamp FL controlled. Let us now first consider the mode of operation of the first arrangement described in more detail on the basis of Fig. i.

In order to connect the incoming line 3 to the outgoing line 2, the connection switch S is actuated, the contact springs i to 6 of which are shown schematically in FIG. If now e: nc further line, z. B. the incoming line 5, switched on by pressing the switch S_ to the existing connection, the relay AL., Tiber to a circuit, which extends from ground to contact 3 of switch S, via the normally closed contact i aes subsequent switch , the contact 2 of the switch S =, line a,. " b and the winding of the relay AL., extends to the battery and earth. The relay ALZ closes via its contact al., and the interrupter U a circuit for the warning function FL_. This is switched on with interruptions and indicates to the liaison officer that the desired line is already in use. After switching back the switch S., the relay AL. Drops by breaking its circuit at contact 2 of the switch S., and the warning lamp FL_ goes out .

If the incoming line i is switched to the connection described above by turning switch S, then (read relay AL. In a circuit from earth at contact 2 of switch S .. via contact 2 of switch S1, line a., b, and AL = battery and switches (las @@ "arnungszeichen FL _ in the above-described"'else a.

If another outgoing line, e.g. 3, should be connected to the existing connection (incoming line 3 with outgoing line 2) and if the switch S was actuated for this purpose, the relay .1L is switched via a circuit , which extends from alder on contact 3 of switch S, via contact .i front S_ ,, contact 6 of S "line c", d and the winding of the relay <3L, to battery and earth extends, turned on. This relay connects by means of its contact al, a circuit for the warning signal FL, (battery g, al "FL, LT and earth), whereby the officer is given a flicker signal (learns to recognize that an incoming line finite two outgoing lines connected is.

Toggle switches, toggle switches, push buttons or any other known connection device may be used.

As a further exemplary embodiment, a circuit arrangement is now based on FIG. briefly describes which one for all incoming and outgoing lines only one monitoring relay is provided.

By turning the switch S, (Fig. 2) the incoming line is connected to the outgoing line 2; At the same time, the circuit for the monitoring relay <2L is prepared by applying an earth potential via contact 3 of switch S to the series-connected break contacts i of the subsequent switches. This is after switching on another line, z. B. ler incoming line 5, closed by pressing the switch SZ and runs from ground to contact 3 of the switch S, via the normally closed contacts i of the subsequent switch. Contact 2 of switch S. ,, lines a., And b, winding of relay AL to battery. The relay AL responds and closes the circuit for the warning lamp FL via its contact al. After the switch S has been returned to the rest position, the previously described circuit for the relay AL at contact 2 of the switch S. is interrupted, so that this relay drops out and the lamp FL switches off.

If another outgoing line i is connected to the existing connection (incoming line 2 with outgoing line 2) by means of switch S ″, contact d. Of switch S closes; when switch S is actuated, it closes via its contacts 3 and 4. Prepared circuit for the monitoring relay AL. This runs from earth at contact 3 of switch S, via its contact .i, line c_, contact 4. of switch S;, lines a, and b and the winding of relay AL to battery and earth As described above, the relay AL switches on the warning lamp FL .

The connection of incoming or outgoing lines other than those listed to an existing connection and the subsequent energization of the relevant Clbenvachungsrelais AL should be readily apparent from the above description from the figures.

Fig. 3 shows as a further embodiment a circuit arrangement in which only the lines of one traffic direction (outgoing lines) are assigned a monitoring relay AR , while the connection of the lines of the other traffic direction when such a line is connected to an existing connection is prevented by test relays PO .

The mode of operation of the arrangement according to Fig. 3 will now be briefly described.

In order to connect the incoming Line z with the outgoing line i, the switch S is brought into its working position, which the contacts i, 2, 3, 4 flips over. A circuit for the test relay is established via contact 3 P and the control relay K closed, which extends from earth via the windings I and II, the relay P, the contact 3 of the switch S ", the line c, and the winding I of relay K extends to battery and earth. Talk in this circuit the relays P and K on. The relay P switches the speech wire a, and b, of the incoming Line to wires a, and b, of the outgoing line with the help of its contacts P, and p. by. The speech circuit was at contacts i and 2 of the switch S, has been prepared. By means of its contact p3, the test relay P closes its high-impedance winding I short and is thereby in a known manner the blocking of the Test lead c, her.

An attempt is now made to connect another incoming line, e.g. B. 3, to the To switch on the existing connection by pressing the S = switch, this can be done test relays O assigned to this line do not respond, as test line c, is kept occupied by the low-resistance winding II of the test relay P. Since that Relay O does not respond, it is via contacts i and 2 of the switch S., prepared speech connection at contacts q, and q, held interrupted.

If, however, another outgoing line, z. B. 2, switched to the existing connection (incoming line i with outgoing line i), the monitoring relay AR is made to respond. This circuit extends from earth at contact 4 of the folded switch S ″ via contact 5 of switch S3, line d and the winding of relay AR to battery and earth. Relay AR closes a circuit for warning lamp AL via its contact ar , which extends from earth via the interrupter U, contact ar, lamp AL to the battery and earth.

Should the outgoing line 6 be connected to the existing connection by actuating the switch S ,,, the excitation of the relay AR takes place in a circuit which is connected from earth to the contact 4 of the switch S via the normally closed contact 6 of the non-actuated switch S; , the remaining contacts 6 of the following connection switch, not shown, the Arleitskontakt .4 of the switch S. "Line d and the winding of the relay AR to the battery and earth runs. The warning lamp is switched on in the same way as previously described.

An arrangement according to the circuit according to Fig. 3 is made for the purpose of in order to enable the through-connection of the To prevent speech arteries in any case. This arrangement is for example for long-distance traffic, in which the incoming lines are long-distance lines, in particular be suitable, since the connected trunk line a large attenuation for speech traffic the existing connection.

Figure 4 shows an arrangement in which each incoming and a special relay is assigned to the outgoing line. These relays control over their contacts are auxiliary circuits for the monitoring relay.

For these auxiliary circuits there are two exemplary embodiments in Figs. 5 and 6 shown.

The mode of operation of this arrangement will now be described in more detail with reference to FIGS. 4 to 6. If a connection between the incoming line: 2 and the outgoing line 2 is desired, the connecting officer actuates the switch S ,. This closes a circuit for the relays II and FZ via its contact 7, which extends from earth via line e, the winding of relay II, line a, contact 7, line c, winding F = and line g to battery and earth extends. The relays II and F. respond and close their contacts 2 and f Z in Fig. 5 and 6. The monitoring relay shown in Fig.5 is provided with two windings AR and AR "and designed as a differential relay. Are now when the relays II and F2 respond, the contacts 2 and f. are closed, the relay AR does not respond, since currents of the same magnitude flow through both windings Connected in series, while the monitoring relay AR is only provided with one winding. For the activated case, the contacts a2 and f2 of the relays II and FZ are switched over so that no circuit is closed for the monitoring relay AR. If the existing connection ( incoming line 2 with outgoing line 2) a further line, e.g. the outgoing line 5, is switched on by actuating the switch S, then the contact 8 of the switch S and the line ng b, the winding of relay V placed in parallel with relay 1I. The relay V responds and closes the resistor al = via its contact 5 parallel to the ZViderstand w1 and the contact 2, so that the current flowing through the winding i of the relay AR is increased. As a result, the monitoring relay AR is energized interrupting via the interrupter U1 and switches on the lamp AL via the contact ar. By moving the contacts 5 in Fig. 6, a circuit is created for the relay AR, which from earth via the normally closed contact i, normally open contact 2 = the contacts 31 and dl connected in series, the normally open contact 51, the normally closed contacts 6, and f iz, the Normally open contact f2_, de normally closed contact f31, normally closed contact 1d. and .the winding of the relay AR to the battery and earth runs, closed. The relay AR responds in this circuit and switches on the lamp AL via its contact ar and the interrupter U_. The supervising officer thus receives a warning signal in each case, whereupon she restores the idle state by flicking the switch in question.

If another incoming line is activated by pressing switch S3, z. B. 3, connected to the existing connection "-order, the relay speaks F3 parallel to relay FZ via relay II and contact 9. By closing of contact f3 in Fig. 5, resistor w4 becomes parallel to resistor w3 placed so that. Now the current flowing through the winding ARII is increased and the monitoring relay AR is thereby made to respond. In Fig. 6 the current exciting the relay AR runs from earth via the normally closed contact i, the Normally open contact 2., the contacts 31 connected in series, i.e. 51, 61, tI1, the normally open contact f21, the normally open contact f3z, normally closed contact f, and the winding of the relay AR after Battery and earth. The monitoring relay AR switches the warning lamp in the top as described.

This arrangement according to Fig. D. to 6 has the advantage of being a special simple design of the connection switch, as it closes the signal circuit only one contact is required for every two lines.

Claims (6)

PATENT CLAIMS: I. Circuit arrangement for monitoring telephone connections according to patent I25801, characterized in that each group of lines (outgoing or incoming) is assigned only a single switching means (AL, AL,) controlling the warning signs (FL, FL2), which in the case of 1-subject connections via the connection facilities. 2. Circuit arrangement for monitoring telephone connections according to patent d.258oi, characterized in that only a single switching means (AL) is assigned to all outgoing and incoming lines of a workstation, «-elches is operated via the connection devices and the warning sign (FL) both at Connections of several incoming lines with an outgoing as well as an incoming with several outgoing lines in operation. 3. Circuit arrangement according to claim i or 2, characterized in that the circuits of the switching means (AL, AL ") controlling the warning signs are closed via contacts in series of the connecting devices (S). D .. Circuit arrangement for monitoring telephone connections according to patent d.258oI, characterized in that a single switching means (AR) controlling the warning sign (AL) is assigned to only the lines of one traffic direction and testing devices (relays P, 0) are assigned to the lines of the other traffic direction which prevent the connection when such a line is connected to an existing connection in a manner known per se. 5. Circuit arrangement for monitoring telephone connections according to patent 425801, characterized in that that a monitoring relay (AR) via contacts (i to 6, f1 to f4) of the switching means (I to IV, F1 to F4), which incoming or outgoing lines are assigned separately are controlled. 6. Circuit arrangement according to claim 5, characterized in that the monitoring relay (ARI, ARII) is designed as a differential relay which is activated by current amplification in the one winding and the warning sign (AL) turns on. Circuit arrangement according to Claim 5, characterized in that the monitoring relay (AR) is controlled via series-connected contacts of the switching means assigned to the lines.