DE1083343B - Circuit arrangement for telephone extension systems with dialer operation and blocking devices to identify inadmissible connections - Google Patents

Description

GERMAN

The invention relates to circuitry for telephone extension systems with dialer operation, in which a relay of a connection path with the choice the traffic direction by a calling extension a blocking device for identification and prevention illegal connections controls. It is known that after marking one for one Extension admissible connection the blocking device for the identification of impermissible connections the influence is withdrawn from the calling party. If a permitted connection is identified by a Part of the code numbers of any multi-digit code, the blocking device is simplified if this only has to record and evaluate the code numbers to identify the permissible connection. aside from that can then with an existing, permissible connection, the choice of current impulse series for other purposes, z. B. for obituaries, can be used without controlling the interlock. Is now the locking device for Identification of impermissible connections that are already beyond the control of the calling party, a Assigned connection path, via which inquiry connections can also be established, must special blocking means are assigned to this inquiry connection path, the inadmissible inquiry connections mark and prevent. Now is the number of different consultation calls that are to be prevented are very large, which is especially the case when inquiry connections to individual subscriber stations are to be prevented, the outlay on blocking switching means is considerable.

The aim of the invention is to use simple means to establish impermissible connections after the establishment of permissible connections To prevent consultation calls. This is achieved according to the invention in that after the Identifying a connection that is permitted for an extension, a relay is switched on that controls the surge circuit the blocking device for identifying impermissible connections and the surge circuit the blocking device by a relay that comes into effect when an inquiry call is initiated during the permissible connection for the control of the blocking device for the again available Identification of the inquiry connection path is prepared.

With the invention, the blocking device, which has already marked a permissible connection, also used to evaluate query connections.

According to a further embodiment of the invention, the locking device, which after the identification of a permissible connection is also used to identify a consultation connection, a connection point assigned. In this case it is possible to use any circuit arrangement

for remote speaker systems

with voter operation and blocking devices to identify impermissible

links

Applicant:
Siemens & Halske Aktiengesellschaft,

Berlin and Munich,
Munich 2, Witteisbacherplatz 2

Franz Kappl, Munich,
has been named as the inventor

evaluate outgoing connection by the blocking device. Connections can be made to participants in the own system, connections with cross-connection lines, connections with exchange connection lines and high-quality trunk connections are identified and evaluated via the trunk lines. Even, then, when there is an incoming authorized connection to an extension, the blocking device stops under the influence of the called station when it initiates a consultation call.

A further development of the arrangement according to the invention is that after the identification of an impermissible Inquiry connection the inquiring extension is able to initiate the call initiated by the blocking device To undo the prevention of the consultation call, which is conveniently done with the Switching back from the consultation path to the exchange connection path is initiated.

An exemplary embodiment of the invention is shown in the drawing. The call station N is assigned a special subscriber transmission. The bridge relay A of this subscriber transmission controls the blocking device SpE, which is provided with blocking wiring SpV . Instead of the direct assignment of the locking device SpEjSpV to two subscriber transmission, the locking device SpEfSpV can also be used for a plurality of equal extensions via connection means, e.g. B. relay selector or rotary selector, can be connected to the subscriber line that is in operation. It is also possible that a plurality of locking devices SpE / SpV are provided for the extension of the system and for this

009 530/126

3 4

Locking devices only have a common lock-busy signal on the handset, so the circuit 3

wiring is used. of relay A interrupted.

τ _TT . _ni · ν · Tr τ. · j The circuit 4 of the relay Fl is connected by contact 4 «

I. Establish a valid connection open. After the relay V2

When the system is in the idle state, the relays Vl and V 2 lead the contacts into the rest resators Cl and C 2 charging circuits for the condensers: back in position. The holding circuit 7 of the relay Sp is 1 4- 1 M Cl Wl- · interrupted by contact 18 vl . There are those in

'''''' facilities taken in the rest area.
^. -ρ, ζ * ύt (s ^ t yy j £ j -.

If the handset is picked up at the extension, then OK. . ^IIL dialing code

If relay A is switched on: for an extension authorized ^{for an office}

% -j_ a / T YIJ N YITi AITi% r - Is used by a calling, authorized subsidiary

o. -ι-, & μ, λ / χ, zv, a / i ι, Ä / ii, or,. ^^ ^ _{dialing code 0} is selected by the

The relay Vl is switched on by the relay A : Blocking device SpE via the blocking wiring SpV

A -X-. Aa Vl ¹ ^ ^ ^as • ^ "■ ^ ■ ^e ^ ^s switched on. For the relay T is on

'' 'Holding circuit established:

Via the contacts 5a and 6a 1 the speech wires 8 * 4- 27 vl 28t Till -
switched through to the subscriber circuit TS. About the

Subscriber circuit (not shown) and the preselection will now subsequently be the code number for any

organ the first surge receiver is provided, ao dialing the extension N permitted trunk connection, so

Through contact 17ül is the call relay ^ i? in this case via the interlocking wiring SpV the

Speech wires switched off. Winding I of relay FR switched on. For the relay

Does the participant of the call station send impulse Fi? the holding circuit 6 is established. The blocking rows are then taken up by relay A. Wiring SpE is released. Another input and through contact 5 a on the surge receiver of the 25 position of the locking device SpE is forwarded by opening the connection path. With the first drop of contact 12 fr prevents
of relay A , relay V2 is switched on: If now during the existing permissible official

5 4- 7til V2 8 «- connection of the calling extension in conjunction with temporary

''>> ■ the outgoing key press the switchover on inquiry

The relays Vl and V2 remain initiated during the current surge 30, so the difference series lying in the circuit 3 is kept excited. Relays X picked up by relay A are temporarily energized. With contact 29λ; the series of impulses are also passed on via the contacts 9Ä2, earth pulse for inquiry switching via the speech 1Ow 1,11 α and 12 fr on the receiving wheels, not shown, to the transmission of the exchange line, relays of the blocking device SpE are transmitted. It takes place in the transfer of office in a known manner

If a connection 35, which is permissible for the extension N, has been switched from the exchange line to the inquiry call, the blocking device SpE triggers the line. The relay Xl is switched on by the feedback acting on the relay X in connection with the blocking wiring SpV the relay question incentive:
FR for the identification of free codes via the 9 4- 30 fr 31 # Xl -
Winding I switched on. For the relay FR is one of

the locking wiring independent holding circuit +0 A holding circuit is established for the relay Xl:

manufactured: ₁₀ _ _{+> 32ölj} 33 ^ _{1 χι>} __

6. 4-, 13%, 14z; 1.15 fr, FRjTL, - . ^,,. "..,,. . _xx "1 · ν

The relay X controlled by the inquiry pulse

The relay FR opens the contact 12 fr. The holding circuit 6 of the is opened with contact 13 *

No more series of current impulses on the blocking device SpE 45 relay FR. The relay FR leads its contacts in the

transfer. The locking device SpE is released to the rest position. By closing contact 12 fr

and returned to the rest position. is the blocking device SpE again through the contact

_TT "",. ",., 11 α of the feed bridge relay A controllable.

II. Establishing an impermissible connection _{becomes VQn of the} 3 ^^^ extension a permissible one

If the calling extension establishes a code 50 inquiry connection, the

selected, which identifies a connection direction , the blocking device SpE and the blocking wiring SpV

for the extension N is not allowed, then the winding I of the relay FR is switched on again. For

Setting of the blocking device SpE via the blocking relay FR , the holding circuit 6 is established,

wiring 5 ^ F the blocking relay Sp via winding I by opening contact 12 fr is another

switched on. For the blocking relay Sp , a holding current is 55 Control of the blocking device SpE through the contact

circle established: 11 α prevented. The facilities of the blocking facility

7 4- 18ül 19 for 20x1 21s * S * / II - Si> £ are returned to the rest position.

/. +, i "" i, "fr, äi * i, / xsp, spill,. Initiates the subscriber of the extension ^ through

Through the contacts 22 spßSsp the speech path is temporarily interrupted by pressing the button, the switch back from, the contact 24sp opens the loop to the 60 of the inquiry line to the exchange line, so this subscriber circuit TS acts. There are beyond the partial incentive turn to the differential relay X in the circuit 3 participants circuit TS to use a comparison taken. The switchback incentive is returned to the rest position by contact 29x binding devices. on the facilities of the transfer of office further-through contact 25 sp the contact 5 a is short-circuited, conducted. The holding circuit 6 is interrupted by contact IZx so that it is in no way interrupted again on the subsequent 65 of the relay FR. The locking device can act. Via contact tungS ^ E is again under the influence of Kon-26 sp , the busy signal BZ is sent to winding III of clock 11a of feed bridge relay A.
Relay A switched on. The busy signal is transmitted inductively to the inquiry line of the inquiry station N after the wraps I and II of the relay A in the loop circuit 3 of the inquiry. If the subscriber sets up a connection due to the 70, this will also be blocked by the blocking

5 6

Device SpE in connection with the locking mechanism ended by opening contact 49Al. It is characterized by the charging wire SpV by now made by the circuit 1 of the capacitor Cl. The locking device SpE / SpV the winding I of the relay Sp relay A is switched on in circuit 3. For which is switched on. Since with the initiation of the inquiry capacitor C 2, the charging circuit 2 exists. For the connection, the relay X 1 is energized, 5 relays H 2 are now a holding circuit:
the following holding circuit established for the relay Sp : ^ g, ^ g 46i; l 47 A2 H2 -
11. +, 34 *, 35x1, 21sp, Spßl, -. _{By dag} ^^ _m . ^ _Now ^ _{the participant} .

Since with the initiation of the exchange connection the transmission marked that it is a permissible

Relay Γ (circuit 8) is energized, the connection to extension N is opened by opening the io. Through contact

Contact 24s ^> no triggering stimulus by loops- 9A2 is a control of the locking device SpE ver

opening on the facilities of the office connection prevents.

away, since the contact 24 sp by contact is now by the subscriber of the called

36 ί is bridged. The speech path after the identification extension N for an incoming exchange connection

drawing of an inadmissible inquiry connection is 15 by pressing a key the incentive to switch inquiry

interrupted by opening the contacts 22spj23sp . The given, then this incentive is in turn provided by the

Subscriber of extension Λ ^Γ receives in the described differential relay X in circuit 3 and with

Way the busy signal. Extension N can forward contact 29 * to transfer the exchange line.

Switchover from the inquiry line via the exchange line. The following will now apply to relay Xl

initiate management. The incentive given by pressing a button is established:

is picked up by the differential relay X and by ^ g , 52 ^ 2 31 Xl

Contact 29 * forwarded to the transfer of office. '' ''

When relay X responds again during the For relay X1 , the holding circuit 10 is established.

Switching stimuli is provided by the holding circuit 11 of the. Furthermore, the relay X at initiation

Relay Sp interrupted by contact 34 *. The relay Sp 25 of the inquiry, the relay Γ switched on:

returns the contacts to the rest position. It consists ^ n _l 53 ^ 2 54 1711

the switching state as it was before the initiation of the return '''> I · ·

question connection was available. , ^The holding circuit 8 is established for the relay T.

,,,. , j Tr τ. · J -vr i_ j. η λ τ Due to the inquiry stimulus, the holding circuit

IV. Incoming connection to NebensteUe IV _{3o lg} ^ _R2 ^ _{Rdais KontSLkt} ^ _{x interrupted.} That

Due to the ringing current over the voice lines , contact 9A2 closes in relay Ή.2, so that the blocking

Call rhythm the relay AR is effective. The relay device SpE is connected through contact 11a of the feed bridge

Hl switched on: relay A is controllable. Through contact 53A2 is the

12 -I- 37 ar 38 ar Hill - excitation circuit 20 of relay T open.

'' · I> ■ ₃₅ the extension N will _now send a permissible return

The call relay R is switched on: interrogation connection is established, as described in the

13 -I- 39Al 40 h2 41 vl RII - way about the locking device SpE and the locking

Wiring SpV the relay FR through the winding I.

The following ringing circuit is switched on by the ringing relay R. The holding circuit 6 is established

of the first call closed: 40 After a permissible inquiry connection has been established,

14. +, 4/1, 42r, 2 \ r, X / IL ^ / II, 43n Rufstromqueue ££. ^By temporarily pressing the button to switch back from the inquiry path to the official path again. Relay H 1 switches on relay H 2: the differential relay X becomes effective. Through contact 13 * is

15 _j_ 44Al H2 ^the holding circuit 6 of the relay FR switched off. the

45 Blocking device SpE is again for the extension N The excitation circuit 13 is available through contact 40 A2.

of relay R interrupted. It is winding I of the If an impermissible consultation connection is established,

Relay R in the discharge circuit of the capacitor C2 is switched on via the blocking device SpE and the blocking: wiring SpV, winding I of relay Sp is switched on.

[Q pj72 C2 4Sr 41 oil RII 5 ° ^scna ltet. For the relay Sp , the holding circuit 11

manufactured. The voice connection is established by opening the

If the capacitor C 2 is interrupted after a certain contact 22 sp / 23 sp. The contact 5 ″ is discharged for a time, so the relay R is bridged over the winding I by contact 25 sp. Since the relay T is no longer held. Via contact 49Al , however, it is switched, no triggering stimulus can be transmitted through contact winding II of relay R to a 5-second interrupt 55 2 & sp on the exchange connection, breaker is switched on. The subscriber of the extension N for which the busy call circuit 14 is established in the same rhythm. sign is turned on, is able to by again

If during the pauses in the call via the subscriber line, the switchover from the inquiry line call relay AR is switched off via the subscriber line, the condensation line must be initiated on the exchange line. The incentive is how sator Cl a discharge circuit via the relay St. 60 already described, by the differential relay X up

17 pjfj a SOhI 51wl HlIII Hill - taken and through contact 29 * on the transfer

forwarded to the trunk.

The relay Hl remains energized in the pauses. If the subscriber of extension N ends the

If the subscriber of extension N reports by binding by hanging up the handset, the circuit 3 lifts the handset, so the relay A becomes effective. The 65 interrupted. The feed bridge relay A leads the relay Vl is switched on in circuit 4. Back to the rest position through contacts. The relay Vl opens contact 17 ^ 1 , the call relay AR from de-energizes. The holding circuit 10 of the speech wires is switched off by contact 32 # 1. Relay Xl is opened by contact 51 vl. Kontakt27öl by the maintenance Eder discharge circuit of the capacitor Cl is open eighteenth Circuit 20 of relay T interrupted. It is the ones in The relay Hl drops out. The control of the i? Relay is 70 devices used in the rest position.

Claims (10)

Patent claims: 1. Circuit arrangement for telephone extension systems with dialer operation, in which a relay of a connection path with the choice of traffic direction by a calling extension controls a blocking device for identifying and preventing unauthorized connections, characterized in that after the identification of a connection allowed for an extension, a relay (FR or H2) is switched on, which prevents the impulse circuit of the blocking device (SpE) to identify impermissible connections and the impulse circuit of the blocking device (SpE) by a relay (X) that comes into effect when a query connection is initiated during the permissible connection for the control the available blocking device (SpE) is prepared for the identification of the inquiry connection path. 2. Circuit arrangement according to claim 1, characterized in that the relay (FR ) preventing the surge circuit of the locking device (SpE) is switched on after the selection of a permissible connection by a calling station via the set locking device (SpE) . 3. Circuit arrangement according to claim 1, characterized in that the locking device (SpE) in connection with the locking wiring (SpV) in addition to the exchange code each free code number for permitted connections and each blocked code number for impermissible connections are determined raid these findings on relays (T , FR, Sp) of the connection path. 4. A circuit arrangement according to claim 1, characterized in that an extension relay (A (X) for receiving rush series and inquiry switching incentives are assigned, and the rush receiving relay (P) controls the locking device (SpE) assigned to one of the extension. 5. A circuit arrangement according to claim 4, characterized in that the relays (AjX) assigned to an extension are connected as bridge relays of a transmission assigned to the subscriber line for receiving series of current impulses and inquiry switchover stimuli. 6. Circuit arrangement according to claim 4, characterized in that with an incoming call for the extension a relay (H2) is switched on, which prevents the surge circuit for the locking device (SpE). 7. The circuit arrangement according to claim 1, characterized in that is turned on by the extension during an allowable trunk call a relay (Xl) to initiate a call-back connection, that the elimination of the switched event of an impermissible inquiry call blocking relay (Sp) prepared. 8. Circuit arrangement according to claim 7, characterized in that the blocking relay (Sp) is switched off for impermissible inquiry connections by the incentive to switch back from the inquiry path to the exchange line. 9. Circuit arrangement according to claim 4, characterized in that the blocking device (SpE and SpV) is connected to the subscriber line in operation for a plurality of equal extensions via connecting means (relay selector, rotary selector). 10. Circuit arrangement according to claim 4, characterized in that for the extensions of the system a plurality of locking devices are provided and a common one for these locking devices Lockout wiring is used. 1 sheet of drawings ©. 009 530/126 6.60