DE1178120B - Circuit arrangement for telephone extension systems with relay-controlled devices for releasing permitted and blocking non-permitted exchange connections - Google Patents

Description

Circuit arrangement for telephone extension systems with through relays Controlled facilities for releasing permitted and blocking non-permitted trunk connections Relay-controlled devices for monitoring the number current impulse generation have opposite the previously only common blocking devices with stepping mechanisms are considerable Advantages, which are in particular that relay-controlled monitoring devices a simplified wiring for the locking digit combinations allow their Returning to the rest position takes place almost without expenditure of time, making it easier on respond to transmitted pulses while for setting the stepper mechanisms pronounced impulses are required, therefore with relay-controlled monitoring devices the risk of falsification of pulses and pulse series is eliminated, among other things. m.

In the course of development, therefore, more use has been made of relay-controlled pulse monitoring devices and attempts have been made to improve them continuously. In the course of this development, an arrangement (German patent specification 1100 713) has become known in which the advantages of monitoring the numbering are controlled via two rows of contacts, from which relay groups (digit relays) characterizing a locking number are switched on one after the other, so that by only one relay of a group up to the penultimate digit of the locking number the progressive locking number combination is identified, whereupon this identification is transferred to the second row of contacts, via which, depending on whether the last code number leads to the locking number or not, the process of locking or unlocking the connection establishment is controlled.

This known arrangement undoubtedly represents an advantageous further development of relay-controlled monitoring devices, but it still requires two special contact rows to meet the demands placed on them.

The present invention seeks to further improve such Facilities, namely by having the same, the pulse numbers of the individual Contact row expressing blocking digits as well as the respective positions the blocking digits or blocking digit combinations characterizing the blocking threat relaying relay as well as circuits are controlled after the last Digit of the identification numbers enable or prevent further connection establishment or the triggering: initiate the connection.

Except for the fact that in the arrangement according to the invention only If there is a row of contacts, it allows savings to be made on additional switching means. For the connection of the individual digits of code number combinations Relays are namely only two connection, or. Changeover relay required that The position relays alternate from one Stedle to the next, depending on one another under the influence of the characterizing the pulse numbers of the respective code numbers Bring a series of contacts.

An exemplary embodiment of the subject matter of the invention is illustrated in the drawing. The relay-controlled pulse monitoring device, shown only as far as is necessary for understanding, consists in its essential parts of 1. the relay chain S 1 to S 5 including relays U, on which the respective transmitted digits are influenced accordingly, 2. the contact series KR, via which the processes for monitoring the individual locking digits are controlled, 3. the digit relays A 1, A 2, A 3 ,. . . , B 1, B 2,. . . Which serve the blocking threat from place to share with blocking numbers or blocking number combinations to spot until it is known whether it is one to release or an illegal connection, the fourth relay Y1, Y2 for arrival and changeover of under third .called relays in such a way that one of these relays is effective at the respective even-numbered digit, the other at the odd-numbered digit of the locking digit combination, 5. the relays B, H, through which the end result "blocking or releasing the selected connection" is directly brought about will.

With BL is a busy line coming from the exchange, with JL that for the transmission of the number current impulse. Serving line, with TL denotes the separating line, via which an organ of the transfer of office is influenced to trigger the connection path.

After the exchange number has been sent and the exchange transmission has been assigned, earth potential is present on the lines JL and BL. After relay J responds via winding I, the following circuit is closed for relay B: +, BL, 63i (working side), 65h, B, -.

The winding 1I of the relay J is switched off by contact 64 b. At the beginning of the first transmitted pulse relay J drops out, so that relay V responds: +, BL, 63i, 62b, V (II and I), -.

By closing the contact 61 v, the relay V gives itself a delayed drop, so that it does not drop during the series of current impulses. With contact 68 v relay H (I) is switched on, which binds independently of the mentioned contact via resistor Wi3 and contact 69h. Relay B remains held via contact 67v during the current impulse. Via normally open contacts 59 b and 57 v there is positive potential at contact 60 i, through which the pulses of the selected digits are transmitted to the counting chain (relays S1 to S5). During the pulse counting process, this positive potential forms a short circuit for the row of contacts KR shown at the top right, so that switching operations are controlled via the row of contacts only after contact has opened. The relays S1 to S5 with switched on or not switched on relay U (contact 2111 in rest or working position) identify in the contact row KR the digits 1 to 5 over the rest side of the contact 21 u, the digits 6 to 9 and 0 over the work side of the Contact 21 according to

In the contact row KR, the number points via which branches are possible are decoupled in a known manner by rectifiers. In order to keep this rectifier for economic reasons as small as possible, the arrangement is such that the rectifier off h immediately after identification of the last digit of the lock number (drop of the relay B while holding the relay H) by short-circuiting through normally closed contact 59b and normally open contact 58 are.

The pulse counting device works as follows: After the end of the first pulse (relay J responds again), the following circuit is established for relay S1: +, 59 b (working side), 57 v, 60 i, 56 s 5, 51 s 4, 49s3, 47s2, 46v, S1, -.

If relay J drops out at the beginning of the second pulse, relay S2 is switched on, while S 1 is held at the same time: +, 59 b, 41i, 43s1 (mode of operation), S2 (I), 45s1, 46v, S1, -.

When the second pulse ends (relay J responds again) the circuit for relay S1 is interrupted, only one circuit for relay S2 continues: +, 59b, 57v, 60i, 56s5, 51s4, 49s3, 47.Y2 (working side), p 2 (II), -. At the beginning of the next (third) pulse, relay S3 (I) is switched on via contacts 43-s1 (rest side) and 48s2 (working side), relay S2 (II) is held. When the pulse ends (relay J responds), only relay S3 (II) remains on via normally open contact 49s3. At the beginning of the next (fourth) pulse, relay S4 (I) is switched on via contacts 43s1, 48.s2 and 50s3 (working side), relay S3 (11) is held. After the impulse, only relay S4 (II) remains switched on via contact 51s4 (working side). At the beginning of the next pulse, relay S5 (I) is switched on via contacts 43 sl, 48 s2, 50.s3 and 52s4 (working side), relay S4 (II) is held. When this impulse ends, only relay S5 (II) is held via normally open contact 56s5 . At the beginning of the next (sixth) pulse, relay 1.1 is switched on, relay S5 (1I) held: +, 59 b, 41 i, 43s1, 48s2, 50s3, 52s4, 53 s5, 54u, U (I), S5 (11) , -.

Relay U binds: +, 596, 40u, U (II), -.

Relay S5 is switched off by contact 54u , so that after the beginning of the sixth pulse all chain relays are in the rest position. To identify more than five pulses, the chain links can be run through again in the manner described. As already indicated, the number points 1 to 5 (via contacts 16s1, 17s2, 18s3, 19s4, 20s5) via the normally closed contact 21u in the contact row KR shown above, and the number 6 to 9, 0 (via Contacts 23 s 1, 24 s 2, 25s3, 26s4, 27.s5).

After each series of digit current impulses, the relay V drops when the normally closed contact 63 i is opened for a longer period of time. As a result of processes which will be described later, as long as a sent digit or digit combination can be added to a blocked number, the relay H is thrown off immediately after each series of impulses , with the result that the relay B continues to be energized via the closing contact 65h is held. If the connection is permitted, relay H remains on hold, so that relay B drops to V.

Of the aforementioned position relays A 1, A 2, A 3; A 4, .., B 1, B 2,. . ., which are only effective for multi-digit blocked numbers, relay A 1 is used to identify the blocking number "5" in the first position, relay A 2 to identify the blocking number "8" in the second position, and relay A 3 to identify the blocking number " 7 «in third place, relay A 4 for identifying the locking number» 9 «in fourth place, relay B 1 for identifying the locking number» 1 «in the first place, relay B2 for identifying the locking number» 1 «in the second place. Corresponding to other blocked numbers, further relays or further wiring can now be added to the "Blocked digit circuit diagram".

Common to all of these relays are two changeover relays Y1, Y2, which ensure that the monitoring circuits are prepared in the correct sequence or that they come into effect. They are switched on and off alternately from place to place in such a way that one (Y2) is switched on after an even-numbered position in the blocking number and the other (Y1) after an odd-numbered position. As long as a digit or a combination of digits can still be added to a blocking number, a certain additional digit relay is switched on in cooperation with the changeover relay, starting with the relay marking the first digit of the locking number, and in this way the indicator of the threatening one Blocking passed on. Since the locking digit combination that reaches up to this level is identified by the digit relay that was switched on last, it is not necessary to keep the digit relays of the previous levels switched on. The advanced locking digit combination is identified by only one relay at a time.

First of all, we will describe the processes that occur when a non-blocked connection direction is selected, for example a call number starting with "2" after the outside line code. It is reminded that when the impulse begins, in addition to relay J, relays B, H and V are energized. After receiving two pulses corresponding to the number »2«, relay S2 is switched on in the pulse counting chain: -I-, 59 b, 57v, 60 i, 56s5, 51s4, 49s3, 47s2 (working side), S2 (11), -.

The earth connected to resistor Wi 4 and contact 21u (quiescent side) via contacts 59 b and 57 v has no effect, since the line connected via contact 17s2 ends at an open contact. Thus, if the contacts 57 v and 67 v open after the relay V has dropped, the relay S 2 and thus the pulse counting chain is brought to the rest position and only then the relay B, which operates with a delay, is brought to waste. There is thus no switching process via the line TL , since the contact 71s2 is open before the contact 75b is closed. A continuous circuit is closed for relay J (1I) via contacts 64b and 63i, so that subsequently transmitted pulses have no effect on the arrangement shown.

1. Lock number »0« At the end: of the tenth pulse, the following circuit is closed for relay S5: -h , 59b, 57v, 60 i, 56s5 (working side), S5 (II), -.

After relay V has dropped out and contact 57v has opened, holding earth is still connected to relay S 5 (II) via 56s5, 60 i, Wi 4, 21u (working side), 27s5, 8 y 1, 10y2, -f-. After the delay time, relay B drops out, so that the earth potential causing the connection to be disconnected is applied to the separating line TL via contacts 75b and 74s5. The subscriber receives a busy signal from the exchange transmission and must give up the connection attempt. (The procedure for relieving the load on the rectifier will be described later.) 2. Lock number "55" After the fifth transmitted pulse for the first lock number, a holding circuit for relay S5 is closed: -i-, 59 b, 57 v, 60 i, 56 S 5, S 5 (1I), -.

If, after the relay V has dropped out, the direct earth potential that was present at the normally open contact 59b is switched off, the following circuit is closed: -h, 10y2, 8 y 1, 9 a 1, A l (1), rectifier, 20s5, 21u, Wi4, 60i, 56s5, S5 (11), -.

The thereby responding relay A 1 is placed in the following holding circuit: -1f--, 59 b, 3 a 1, A 1 (11), Y 1 (I), -and parallel: to this Y 1 (11), 36 y 1 , GR, H (1I), 39 h, Wi 2, -. The above-mentioned holding circuit for relay S5 is separated by contact 9 a 1 and thus the pulse counting chain is brought to the rest position. In the holding circuit for relay A 1 , relay Y 1 cannot initially respond, since both windings are connected to one another, but relay H is thrown off when the opposite winding II is excited. This prevents relay B from dropping out, since after contact 67v has opened the circuit for relay B via contacts 63 i and 65 h is maintained. After relay H has dropped out, direct earth potential is switched on at the point marked "x": -I-, 42b, 45s, 47s2, 51s3, 51 s4, 56s5, 60 i, 58h (rest side), 59b, -I -.

This eliminates the differential effect for relay Y 1. It speaks on, switches on relay Y2 at contact 37 y 1 in preparation and also applies preparatory with contact 8 y 1 earth potential to another required position relay.

In this state of the connection establishment, the relays J, B; Y1 and A 1 energized. If the next digit is dialed "5", thus completing the blocked number "55", the first time relay J drops out, relay V and thus relay H with holding circuit will respond. After the five power surges it is again. the relay S5 is switched on, which is in the following holding circuit after the relay V has dropped out: -, S 5 (1I), 56s5, 60i, W14, 21 u, 20s5, rectifier, 30a 1, 8 y1, 10y2, +.

After relay B has dropped out (relay H remains energized), the holding circuit for relay S5 is routed via direct earth to contacts 59b (resting side) and 58h (working side), which means that the decoupling rectifier switched on via contact 20s5 is shut down. The purpose of this measure is that the minimal switch-on time makes it possible to use rectifiers of the smallest dimensions, so-called "point rectifiers", which has a beneficial effect on the overall arrangement from an economic point of view.

After relay B has dropped out when relay S5 is switched on, isolating potential is applied to line TL via contacts 75b and 745, thereby initiating the release process.

Would in place of one. If a blocked connection direction beginning with the identification number "55" is selected, for example, if an allowed traffic direction beginning with the identification number "54" is selected, the digit relay S 4 with the following holding circuit would be switched on after the second digit "4" has been transmitted: -, S 4 (II), 51s4, 56s5, 601, 57v, 59b, @ - . In contrast to a blocking number, no further holding circuit for relay S4 can be established via the contact row KR, since the contact 19s4 has no access to the earth at the contact 10y2 due to the open contact 14b2. The attitude for relay S4 is therefore controlled solely via contacts 59h and 57v. If relay V drops after the series of impulses, chain relay S4 will drop out first and then relay B. So no disconnection process is controlled via line TL. A continuous circuit is closed for relay J via contacts 63 i and 64 b, which circuit prevents further transmitted pulses from influencing the arrangement shown. Apart from relay J, only relay H remains energized for the duration of the connection. 3. Lock number »1l3« After selecting the number »l«, the chain relay S1 is energized: +, 59b, 57v, 601, 56s5, 51s4, 49s3, 47s2, 45s1, S1, -.

After the relay V drops out and the contact 57v opens (disconnection of direct earth), the following circuit is established: +, 10y2, 8y1, 12b1, B1 (1), 16s1, 2111, Wi4,60i and further as before via relaySl. The relay B 1 responding in this circuit is in the following holding circuit: +, 59 b, 5 b 1, B 1 (11), Y 1 (I), -and parallel to it Y l (11), 37y 1, GR, H (II), 39 h, W i 2, -. As its two windings are connected in the opposite direction, relay Y1 cannot respond at first, but relay H is thrown off by counter-excitation, whereby the continuation of the circuit for relay B is ensured (at contact 65h). The aforementioned holding circuit for the chain relay S1 was opened by contact 12b1. After this relay and relay H have dropped out, there is direct earth potential at point "x" : x, 42b, 45s 1, 47s 2, 49s 3, 51s 4, 56s 5, 60i, 58h (rest side), 59b (working side), + .

As already mentioned, the differential effect for relay Y1 canceled, it responds.

After selecting the second digit »1«, the chain relay S1 is switched on again after the relays V and H, as v is connected via contacts 59 6 and 57 as before. After relay V drops out, the following circuit becomes effective: +, 10y2, 8 y 1 (working side), 29b1, B 2 (I), 16s1, 21u, Wi4, 60i and further as before via relay S1.

The responding in this circuit relay B 2 closes with contact 4 b 2 the holding winding of the relay. B 1 (I1) briefly, so that this falls off. The holding circuit for the chain relay S1 is opened by contact 29b 1, so that this also drops out. Previously, the following circuit was closed via contact 32b2 : -1 -, 59 b, 32 b 2, B 2 (1I), Y 2 (I), - and parallel to this Y2 (II), 38y2, 37y1, GR, H (II ), 39h, Wi2, As a result of the opposing connection of its two windings, relay Y2 cannot initially respond, but relay H, as already described, is thrown off, thereby closing the safety circuit at contact 65h for relay B. After relays S1 and H drop out, there is direct earth potential at point "x" in the manner described, so that the differential effect for relay Y2 is canceled and it responds. Contact 1y2 cancels the current circuit for relay Y1.

After selecting the next number "3", which completes the blocking number, the trigger criterion must take effect. The chain relay S3 responds after the series of impulses. After relay V has dropped out, the chain relay remains energized via '+, 10y2 (working side), 14 b2, 18s3, 21u, Wi4, 60 i and further via chain relay S3 (II), since relay H does not drop after this series of impulses , relay B will drop out after the delay time. As previously described, tripping earth is connected to line TL via contacts 75b and 72s3 (rectifier discharge over 59b and 58 h).

The zoom out at the contact 14 b 2 cable has except for the contact 18s3 access to the contacts 19s4, 20s5, 23s1, 24s2 and 25s3. This ensures that the blocking and release is effected even when the identification numbers "114", "115", "116", "117" and "118" are sent.

If the identification number "112" characterizing a permitted connection were sent, after the third digit "2" only the holding earth via contacts 59b and 57v would be effective for the chain relay SZ, but no earth via contact 17s2, since contact 15a4 is open is. The chain relay S2 would drop out after the relay V dropped out (contact 57v opened) and only then after the delay time the relay B. So no disconnection criterion is applied to the line TL . Relay J (II) is, as previously mentioned, placed in a continuous circuit, so that further transmitted pulses have no effect on the arrangement shown.

4. Lock number »58792« After the first series of impulses, the SS chain relay with holding circuit is energized via contacts 57v and 59b. In addition, as described in the first place for number "5" above, relays A 1 and Y1 are switched on.

Status before the second digit »8« was selected: Relay J, B, Y 1, A 1 energized. As always, relays V j and H are energized at the beginning of the series of impulses. After the series of pulses, the chain relay S3 with the relay U is energized. After relay V drops out , the following circuit becomes effective: +, 10 y 2, 8 y 1 (working side), 30 a 1, A 2 (I), rectifier, 25s3, 21u (working side), Wi4, 60i and on to the chain relay S3 (II), -.

Relay A2 responds. A short circuit is produced for relay A 1 via contact 2a2 and this is caused to drop out. Contact 30a1 opens the circuit listed above for the chain relay S3. In the meantime, the following holding circuit had been established for relay A 2: +, 59 b, 34 a 2, A 2 (1I), Y 2 (1), - and parallel to this Y 2 (II), 38y2, 37y 1, GR, H (H), 39 h, Wi2, -.

Relay Y2 cannot respond yet, relay H is through Counter-excitation thrown off. By direct connection to the earth at point »x« in the multiple Relay Y2 is switched on by opening its contact 1y2 causes relay Y1 to drop out.

Status before the third digit »7« was selected: Relay J, B, A2, Y2 energized. At the end of the series of pulses, the chain relay S2 is switched on together with relay U. After relay V drops out and contact 57v opens, the following holding circuit is closed for relay S2: +, 10 y 2 (working side), 13 a 2, A 3 (I), rectifier, 24 s 2, 21 u, Wi 4, 60 i and further via S2 (II), -.

In this circuit, relay A 3 also responds, the contact 35a3 of which, together with the normally closed contact 36y l, forms the relay. A 2 (II) throws off by short circuit. Contact 13a2 opens the aforementioned circuit for relay A 3 (1) and chain relay S 2 . In the meantime, the following holding circuit has been established for relay A 3: +, 59b, 7a3, A 3 (II), Y 1 (I), -and parallel to this Y 1 (II), 37y 1, GR, H (II), 39 h, Wi 2, -. Relay Y1 cannot yet respond, but relay H is dropped. The direct earth connection at point "x", which has already been mentioned several times, comes about, which means that relay Y 1 responds. Contact 36y1 opens the circuit for relay Y2.

Status before the fourth digit »9« was selected: Relay J, B, Y 1, A 3 energized. At the end of the series of pulses, the chain relay S4 is energized together with the relay U. After relay V drops out and contact 57 v opens, the following holding circuit is closed for chain relay S 4: +, 10y2 (rest side), 8y1 (working side), 28a3, A 4 (1), 26s4, 21u, W14, 60 i and continue to chain relay S 4 (1I), -.

Relay A 4 responds, the contact 6a4 of which, together with contact 1v2, drops relay A 3 by short-circuiting. Contact 28a3 opens the aforementioned circuit for relay A 4 (I) and chain relay S4. In the meantime the following holding circuit has been established for relay A 4: +, 59 b, 31 a 4, A 4 (I1), Y2 (I), - and parallel to this Y 2 (II), 38y2, 37y 1, GR, H ( II), 39 h, W12, relay Y2 cannot yet respond, but relay H is thrown off by counter-excitation. The direct earth connection to the contact 1 y 2 opens the circuit for relay Y 1.

Status before the fifth digit »2« was selected: Relay J, B, Y2, A4 energized. At the end of the series of pulses, the chain relay S2 responds. After relay Y has dropped out and contact 57v has opened, the chain relay is kept excited: +, 10y2 (working side), 15a4, 17s2, 21u, Wi 4, 60 i and on to chain relay S 2 (1I), the excitation of chain relay S2 In this case, the delay time of relay B survives, since its hold, since relay H is not thrown off, depends solely on contact 67v. The isolating potential is applied to the line TL via contacts 75b and 71s2, thereby causing blocking and tripping in the manner described. After relay B has dropped out, as with all completed blocking numbers, direct earth potential is switched on via contacts 59b (rest side) and 58h (working side) to relieve the load on the rectifier.

Claims (10)

Claims: 1. Circuit arrangement for telephone private branch exchanges with devices controlled by relays for releasing permitted and blocking non-permitted exchange connections, characterized in that the contact series (KR) expressing the pulse numbers of the individual blocking digits both characterize the respective digits of the blocking digits and / or combinations of blocking digits , relay relaying the blocking threat (digit relays A 1, A 2,..., B 1, B 2, ...) - as well as the circuits that enable or prevent or prevent further connection establishment after the last digit of the identification number initiate the release of the connection. 2. Circuit arrangement according to claim 1, characterized characterized in that the process of blocking or releasing a connection the blocking threat depends on the sequence in which the operating states are changed The maintaining relay (B) and the relay via the series of contacts influenced the number of pulses the last digit of the locking digit combination identifying the relay (one of the Chain relays S1 to S 5). 3. Circuit arrangement according to claim 2, characterized in that that for the purpose of blocking a connection for the number of pulses of the last blocking digit characteristic relays a holding circuit is formed via the contact row (KR), the state of excitement of the person maintaining the lock threat, with a delay working relay (B) that has been switched off after the last lock digit. 4. Circuit arrangement according to claim 1, characterized by two a connection the control relay (Y1, Y2) that can be reached via the row of contacts; which progressively alternately from place to place of the blocking digit combinations to be influenced. 5. Circuit arrangement according to claim 4, characterized in that that the relays control each other in such a way that one (Y2) after even-numbered, the others (Y1) switched on after odd digits of the lock digit combinations is. 6. Circuit arrangement according to claim 4, characterized in that each Relay affected the circuit for the one corresponding to the next locking number Pulse counting point of the row of contacts lying position relays prepared. 7. Circuit arrangement according to claim 6, characterized in that the respective switched-on position relay the occurrence of the trigger criterion within the lock digit combinations prevented. B. Circuit arrangement according to Claims 5 and 6, characterized in that that the respective activated position relay triggers the previous position relay and after securing (shedding the relay H) of the circuit for the blocking threat maintaining relay (B) activates the other connection relay (Y1 or Y2). 9. Circuit arrangement according to claim 8, characterized in that when one connection relay is switched on, the other relay is switched off will. 10. Circuit arrangement according to claim l or 3, characterized in that after evaluating the last digit of a locking number, the decoupling rectifier lying on the row of contacts (KR) are short-circuited by applying direct holding earth (via break contact 59 b and make contact 58 h) for the respectively switched on chain relay.