DE1055609B - Circuit arrangement for telephone extension systems with the establishment of conference connections by the extension officer - Google Patents

Description

The invention relates to a circuit arrangement for telephone private branch exchanges in which for the branch office officer a connection to several lines of different types via an interrogation line Connection paths are provided and the lines of the various connection paths via a conference line can be interconnected to a conference connection. The branch officer did call a conference call and this is involved in this conference call, see above the possibility must be provided for the branch officer to manage a connection path who is not involved in the conference call. The connection the civil servant to such a management not involved in the conference can through a present Call over said line may be required, there may also be the operational case that the Extension officer on a line that was not previously involved in the conference call, has to call another participant and now also connect him to the conference connection is. The aim of the invention is the brokering activity of the above operating cases Extension officer quite easy to make. This is achieved by the fact that with an existing conference connection the extension officer with the corresponding lines, via the other conference participants are switched on, and pressing the answer button is not on the conference call involved line automatically switches off the Extension officer from the conference leader.

If the extension officer has a conference call with other participants, then alone press the answer button on a line not involved in the conference call to the extension officer switched off by the conference line and at the same time to the answer button pressed marked line switched on.

It is known that when the office button is pressed, an extension officer depends on the switching status of the test relay of an exchange dialer, the extension officer is connected to the extension side or to the exchange side of the exchange transfer. These Technology cannot be used to solve the problem in the present invention.

An exemplary embodiment of the invention is shown in the drawing. The FSP place of the extension officer with the BA apparatus has an interrogation line AL. The lines Ll, L2 and LX can be connected to this interrogation line. The lines LI ₁ L2, LX lead either to transmissions of

Circuit arrangement
for telephone exchange systems

with manufacture

of conference connections

by the branch officer

Applicant:

Siemens & Halske Aktiengesellschaft,

Berlin and Munich,
Munich 2, Wittelsbacherplatz 2

Fritz Villinger, Großhesselohe near Munich,
has been named as the inventor

Trunk lines, district lines, cross-connection lines, or direct lines to preferred call stations. Furthermore, one of the lines can also be the connection line from the extension officer to the dialer of the private branch exchange. To set up a conference call, the extension officer has to press the switch on button of the lines in question one after the other. If the button AT 2 of the line L 2 is pressed temporarily, the relay AH 2 is switched on:

1. +, GU, AT2, IJHZ, -.

A holding circuit is established for relay AH 2:

2. +, Ic, 2ah2, IIAH2, -.

Relay AH2 closes contact 3ah2, which creates a circuit for relay A assigned to the operator console:

3. +, W2, 3ah2, IAH, A, -.

Only relay A is actuated in this circuit. The relay AH remains in rest. Relay K2 is switched on by relay AH2:

4. +, GU, 4: ah2, K2, 5g2, -.

909 507/121

Relay K 2 is kept energized independently of contact 4α / ί2 via contact 5 & 2. Relay A assigned to the location switches on relay B :

5. +, 6a, B, -.

Depending on relay B , the connection relay AS2 of line L 2 is now switched on:

6. +, GU ₁ 7ST ₁ Sc ₁ 9b, 10ah2, AS2, -.

Relay B of location FSP switches on relay C :

7. +, 1Ib ₁ C ₁ -.

Relay C opens holding circuit 2 of relay AH 2 with contact 1c. Contact 8c opens excitation circuit 6 of relay AS2 . The following holding circuit now exists for the AS2 relay:

8. +, GiJ, 7ST ₁ 12c, 13tr2, 14gj2, AS2, -.

When relay AH2 drops out , circuit 3 is opened by contact 3ah2, relay A drops out. 6 a contact interrupts the circuit 5 of the relay B. The relay B opens contact 11 b of the relay 7 the circuit C for the relay AS 2 is made to drop the relays B and C the following hold circuit:

9. +, GU ₁ 7ST, 8c, 15b, 13tr2, 14as2, AS2, -.

The interrogation line AL is connected to the speech wires α 21b 2 of the line L 2 via the contacts 16 cw 2/17 gw2. The contact 18 k 2 is closed by the relay K excited in the circuit 4 and a circuit is thus prepared for the relay SA 2 , which connects the speech wires a2 / b2 of the line L2 to the conference line KL .

The officer establishes a connection with the corresponding connection point via the line L2 and makes the participant at this point aware of the convening of a conference call.

The officer now has to call the other participant in the conference connection. For this purpose, she only has to press the switch-on button for the line via which the next conference participant can be reached. To connect the officer z. B. on the LX line , press the ATX key temporarily. The relay AHX is switched on:

ία. 4-, GU ₁ ATX ₁ IAHX ₁ -.

A holding circuit is established for the relay AHX:

11. +, Ic ₁ 19ahx, UAHX ₁ -.

Relays A and AH assigned to location FSP are switched on by relay AHX :

12. +, WZ, 20 ahx, IAH, A, -.

Only relay A is actuated. The relay KX is also switched on:

13. +, GU ₁ 26ahx, KX ₁ 27gx, -.

The relay KX is kept energized independently of contact 26 ahx via contact 28 kx. With contact 29 kx the circuit of the relay SAX is prepared, which connects the line LX to the conference line KL .

Relay B in circuit 5 is switched on by relay A. Relay B opens holding circuit 9 of relay AS 2 with contact 15 b . Relay AS2 drops out. The interrogation line AL is switched off from the line L 2 by the contacts 16as2 / 17as2. When relay B is switched on, an excitation circuit is established for relay ASX :

14. +, GU ₁ 7ST ₁ 8c, 9b, 2IaHx ₁ ASX ₁ -.
5

After the response of the relay B of the place FSP , the relay C in the circuit 7 is switched on. The relay C interrupts with contact 1 c the holding circuit 11 of the relay AHX. Contact 8 c opens circuit 13 of relay ASX . The following holding circuit exists for the ASX relay after relay C of location FSP has responded:

15. +, GU, 7ST, 12c, 22trx, 23asx, ASX, -.

When relay ASX drops out, circuit 12 of relay A is interrupted by contact 20 ahx. The falling relay A opens with contact 6ß the circuit 5 of the relay B. The relay B brings with contact 11 & the relay C to drop out. For

ao the relay ASX now consists of the following holding circuit:

16. +, GU, 7 ST, 8 c, 15 b, 22 tr χ, 23 asx, ASX, -.

The interrogation line AL is now connected to the speech lines axlbx of the line LX via the contacts 2 ^ kasxl25asx . The officer sets up the connection path over the line LX to the desired connection point, and the participant of this connection point is also informed of the conference connection.

In order to interconnect all participants via the conference line KL , the officer of the place FSP only has to press the common group call button (ST) temporarily. The holding circuit 16 of the relay ASX is interrupted by contact 7ST of this button. The connection between the interrogation line AL and the line LX is interrupted by the contacts 24 asx 125 asx . The relays SA, SA2 and SAX are now switched on.

The relay SA is switched on via the following circuit:

17. +, GU, 30ST, 31c, ISA, -.

A holding circuit is established for the relay SA:

18. +, GU ₁ 32c, 33sa, USA, -.

The FSP officer is connected to the KL conference management via contacts 34 saf35 sa .

The relay SA2 is switched on via the following circuit:

19. -K GU, 30ST, 18 / fe2, ISVi 2, -.
55

The following holding circuit exists for relay SA 2:

20. +, 36ir2, GZ, IISAZ, 37sa2, -.

Relay G 2 also becomes effective in the holding circuit of relay SA 2. The relay K 2 is switched off by contact 5 g-2. The speech wires a2 / b2 of the line L2 are connected to the conference line KL via the contacts 38 .sa2 / 39sa2 .

The relay SAX is energized in the following way when the ST button is pressed:

21. +, GU, 30ST ₁ £ 29 jtr, ISAX ₁ -.

The holding circuit for relay SAX is as follows: 22. +, 40 trx, GX ₁ , HSAX ₁ 41 sax, -.

Relay GX also responds in the holding circuit of relay SAX . The relay KX is switched off by contact 27 gx. The speech cores ax / bx of the line LX are interconnected with the conference line KL via the contacts 42 sax / 43 sax.

To set up a conference call, the extension officer must press the connection buttons for the lines in question. With the connection of the officer to the appropriate lines relay will these lines controlling the Anschalterelais SA of Kohferenzleitung KL prepared by the i?. By pressing the common .ST key once, the SA connection relays of the corresponding lines are switched on and all conference participants are connected together at the same time.

If there is a conference connection of the FSP with the lines L 2 and LX via the conference line KL and the connection of the officer to the L 1 line, which is not involved in the conference connection, is required, the officer of the seat only has the connection button AT 1 of the Press line Ll. The relay AHl is switched on:

23. +, GU ₁ ATl ₁ IAHl, -.

A holding circuit is established for the relay AHl:

24. +, lc, 4 £ ahl, UAHl, -.

The following circuit is established for relays A and AH of location FSP:

25. +, Wl, 45 αλί, IAH ₁ A ₁ -.

Only relay A is actuated, relay AH remains in the rest position. When the relay AHl of the line Ll responds, the relay Kl is switched on:

26. -1-, GU ₁ 5IaM ₁ Kl ₁ SIgI ₁ -.

The relay Kl holds independently of contact 5IaA-I via contact 53 kl. The circuit of the relay SA 1, which connects the line L1 to the conference line KL , is prepared by contact 54fei. The relay ^ of the place FSP switches on the relay B in the circuit 5. The following circuit is now established for the connection relay ASl of the line Ll:

27. +, GU ₁ 7ST ₁ 8 _Cj 9b, 46 afc 1, ASl ₁ -.

By the relay B is switched on via contact 11 b, the relay C in the circuit. 7 The excitation circuit 17 is opened by contact 31 c and the holding circuit 18 of the relay SA is opened by contact 32 c. The relay SA drops out. By opening the contacts 34 sa / 35 sa , the officer of the FSP place is switched off by the conference management KL. When relay C responds, a holding circuit is established for relay ASl:

28. +, GLT, 7ST ₁ 12c, 47trl, 4Sasl, ASl, -.

With operation of the relay C, the circuit 24 of the relay AH is interrupted by contact c 1. 1 The relay AH 1 opens the circuit 25 of the relay A. By contact 6 α, the circuit 5 of the relay B is opened. Relay B causes relay C to drop out with contact 11 b . The following holding circuit now exists for relay AS 1:

29. +, GU, 7ST ₁ 8c, 15b, 47irl, 4 & asl, ASl ₁ -

'Via contacts 49 as 1/50 as 1, the sense line AL is connected to the phone lines α 1 / bl of the line Ll is connected. The officer of the place FSP can answer an existing call about the line Ll or also establish a connection in the outgoing direction. If the participant reached via the line L1 is also to be connected to the conference line, the officer has to temporarily press the common key ST alone.

ίο 'The holding circuit 29 of relay AS 1 is interrupted by contact 7 ST. The "line Ll" is switched off from the interrogation line AL by opening the contacts 49 as 1/50 as 1. The relay SVä in circuit 17 is switched on via contact 30ST and kept energized in circuit 18. Pressing the button also activates this Relay SA 1 of line L1 switched on:

30. +, GU ₁ 30ST ₁ 54 * 1, 15141, -.

The relay SA1 is held in the following circuit:

31. H-, '55 tr I ₃ Gl ₁ USAl ₁ 56sal, -.

The relay Gl is excited in the aforementioned circuit and relay Kl is switched off by contact 52 gl . The speech lines α 1 / & 1 of the line L1 are now connected to the conference line KL via the contacts 57 ία 1/58 yes 1. There is thus a conference connection between the place

FSP and the lines Ll ₁ L 2 and LX. - ■

Is there a conference connection and should one of the

Lines are switched off by the officer of the FSP from the conference line KL , the officer only has to press the switch-on button of the line in question and then the common disconnect buttons TT. This mode of operation also corresponds to the disconnection of a connection via an exchange line, so that the officer has to carry out the same switching measures in each case.

If the lines Ll, L 2 and LX are involved in the conference connection as described next to the place FSP and if the line L2 is to be disconnected from the conference connection, the officer has to press the button AT2 . The relay AH2 in circuit 1 is energized and held in circuit 2. Since the connection relay SA2 of the conference line KL is energized, the contact 59sa2 is closed This short-circuited the resistor W 2. Not only the relay A, but also the relay AH of the place FSP is then connected via contact 3ah2 The relay A switches on the relay B in the circuit 5. The relay AS 2 of the line L 2 is switched on in the circuit 6. The relay B of the place FSP switches on the relay C in the circuit 7. For the relay AS 2 , the holding circuit 8. Although the relay C interrupts the holding circuit 18 of the relay SA at contact 32c, the following holding circuit is established for the relays SA and AH:

32. +, UAH, 60 ah, 6Ic ₁ 33sa, HSA ₁ -.

The connection of the place FSP to the conference circuit KL is hereby maintained. When relay C responds, circuit 2 of relay AH2 is opened by contact Ic. Contact 3ah2 interrupts the circuit of relays A and AH of place FSP . The relay A opens with contact 6 α the circuit 5 of the relay B. The circuit 7 of the relay C is through contact 11 b

opened. When the relay C drops out , the circuit 32 is interrupted. The relay AH drops out. There is holding circuit 18 for relay SA. When relay C drops out, relay AS 2 of line L 2 in circuit 9 is switched on.

If the FSP officer now switches on the common cut-off button TT , a circuit is established for the cut-off relay Ti? 2 on line L2:

33. +, GU, TT, & 2as2, TR2, -.

A holding circuit is established for relay TR2:

34. -h 63g-2, 64ir2, TR2, -.

The circuit 9 of the relay AS 2 is separated by contact 13 tr 2. The speech wires α 21b 2 of the line L 2 from the interrogation line AL are switched off. The relay Ti? 2 opens circuit 20 with contact 36 ir 2. Relays G 2 and SA2 drop out. The connection between the line L 2 and the conference line KL is canceled by the contacts 38 sa 2/39 sa 2. When relay G2 drops out , the circuit of relay TR2 with contact 63 g2 is interrupted. With this, the relay TR2 is returned to the rest position when the facilities of the lines L 2 are released with certainty.

By pressing the switch-on button AT 2 of the line L 2 involved in the conference connection and then pressing the common disconnect button TT , the line L 2 is switched off from the conference line KL. The officer remains in contact with the KL conference management via contacts 34 sa / 35 sa .

The disconnection of a line from the conference line KL can also be initiated by the speech station reached via the line L 2. The triggering stimulus given by the telephone station by hanging up the receiver is transmitted to relay Ti? Via line L2-Ue. 2 transmitted, and the relay Ti? 2 then causes relay SA 2 to drop out in the manner described.

If there is a conference connection between the branch officer of the FSP with the lines Ll, L 2 and LX and the branch officer wants to switch off from the conference line KL , the officer only has to return the contact GU to the rest position. The circuit 18 of the relay SA is interrupted. The relay SA opens the contacts 34 sa / 35 sa, so that the officer is disconnected from the conference line KL. The triggering of the still existing conference connection between the lines Ll, L2 and LX can be initiated by hanging up the receiver at the corresponding subscriber stations.

Claims (3)

Patent claims: 1. Circuit arrangement for telephone extension systems, in which an interconnection to several lines of different connection paths is provided for the extension officer via an interrogation line, and the lines of the connection paths can be interconnected via a conference line to form a conference connection, characterized in that when the conference connection of the extension officer is in place with the corresponding lines (L2ILX), via which other conference participants are connected, and pressing the query button (ATl) of a line not involved in the conference connection (Ll) automatically with the control of the corresponding connection relay (ASl) disconnection of the extension officer from the conference line ( KL) takes place. 2. A circuit arrangement according to claim 1, characterized in that by the control of the connection of the officer to a line of a connection path causing Anschalterelais (AHVAS T) are brought the attendant assigned control relays (A, B, C) to the effect that the relay ( SA) to connect the extension officer to the conference line (KL) (at contact 31c). 3. Circuit arrangement according to claim 2, characterized in that the control relays (A, B, C) of the switchboard cause the drop in the switch relay (AS 2) of a first line when the extension officer presses the switch-on button (ATX) of a second line (LX) . Considered publications:
German patent specification No. 903 468. 1 sheet of drawings © 909 507/121 4.59