DE505410C - Circuit arrangement for monitoring connections in telephone systems with dialer operation - Google Patents

Description

Ίαι

The present invention relates to the monitoring of connections through the official staff in telephone systems with dialer operation.

As monitoring devices for the voters were previously for a frame of 30 to 100 voters use different colored lamps together. When actuated one of these operating signals had to be given to the official staff first, all of the voters of this frame examine individually in order to be able to determine which selector has the displayed operating status, had taken. The lighting of an alarm lamp also gave no indication of whether there was only one Voters or several voters were in the displayed operating status. With voters whose successive switching operations are regulated by the control switch, you can now check the operating status of the The selector can be seen from the respective position of the control switch. However, if voters without a control switch are used, then the determination of the operating status of a specific voter from the frame signaling not possible alone. Rather, it is the state of the relays assigned to the selector and the voter himself decisive for his operating status. Such statements However, they are time-consuming and, especially in the case of voters with a relatively large number of relays, errors on the part of the official staff.

The invention now has the purpose of providing the official staff with the establishment of the operational 3 " to facilitate the condition of the individual voters considerably, which is achieved in that a monitoring character assigned to a voter during the establishment and the existence of a connection to the Effect coming switching means is so controlled that its mode of operation a Clues to determine the respective status of the connection.

As an exemplary embodiment, the circuit of a group selector is shown in the figure shown, to which a lamp is assigned as a monitoring symbol. All for that Understanding the invention insubstantial circuits and devices are simplicity have been omitted for the sake of

For the purpose of a more detailed description of the circuit shown in the figure, it is assumed that the group selector GW has been assigned via a preselector or an upstream group selector. In this case, the relay A has responded through its windings I and II and on his

Contact U ₁ a circuit for the delay relay B closed. The monitoring lamp L is switched on at the contact ^ ₁ via the head contact k _t. The contact b ₂ prepares the circuit of the lifting magnet HM . If the calling subscriber sends out a series of impulses to set the group selector, the circuit of relay A of the selected digit ίο is interrupted correspondingly often. Each time the relay A drops out, the lifting magnet HM is excited via the contact α _χ and the contacts b _{2 and Cf 1.} In parallel with HM , a circuit for delay relay C is closed at the same time via contact A _1. Like relay B, this remains energized during each series of impulses. The group selector is raised to the desired decade in a known manner by the lifting magnet HM. When relay C responds, relay / is energized via contact C _{1 in} the following way: earth, contacts b _t , C ₁ , d ₂ , dm, k ₂ , winding of /, battery, earth. The relay J prepares a circuit for the rotary magnet DM at contact J _1. As soon as the relay C is de-energized shortly after the end of the series of impulses, the circuit for the rotary magnet DM is closed at contact C ₁ , so that it responds and the switching arms of the Group selector can be associated with the first contact of the desired contact series. If the connection line connected to these contacts to a downstream line selector is busy, the test arm is directly connected to earth, so that the winding of the test relay D is short-circuited. When the rotary magnet DM responded, the circuit for the relay / was interrupted at contact dm , which switches off the rotary magnet at contact I _1. If the connecting line connected to the first contact is occupied, the relay / is re-energized and causes the rotary magnet DM to respond via its contact I _1. DM again interrupts the circuit of relay J at its contact dm , which opens the circuit of DM at contact I _1. This interplay continues until a free connecting line leading to the line selector LW has been found.

If, however, all of the connecting lines connected to the desired row of contacts are occupied, the contacts W ₁ and W _{2 are} closed after all the contacts in the row of contacts have overflowed. The lamp L is switched on via the contact W ₁ and the head contact k ₁ folded over during the first stroke step, while at the contact W ₂ a busy signal, which is transmitted by the transmitter Ue ₁ from the buzzer 5 ¹ , to the line α in a known manner the slow interrupter U ₁ and the resistor Wi _{1 is} applied. The purpose of the breaker U ₁ and the resistor W ₁ will be explained later.

If a free connection line is found, the test and through-switch relay D responds in the following circuit: earth, contact O ₁ , line c, winding of D, contact dm, head contact k ₂ , winding of /, battery and earth. The relay / cannot respond due to the high-resistance winding of relay D. The circuit of the lifting magnet HM is opened at contact d ₁ , while lines a, b and c are switched through to the occupied connection line and thus to the line selector LW at contacts d ₂ , d _s and d _A. Now the contacts A ₂ and (Z ₄ is connected via the coil of relay RA, a circuit for the relay R of the line selector LW closed. The following emitted by the calling subscriber surge rows by interrupting the circuit to the relay R to the contact a ₂ to Magnets of the line selector transmit, which bring the switching arms with the connection lines of the desired subscriber in connection in a known manner. Likewise, the checking and calling of the desired subscriber is carried out in a known manner and will therefore not be described in more detail.

If the called subscriber is busy, a busy signal is applied to the α-wire of the connection line occupied by the GW via contacts (not shown) of various relays (in the LW). The transformer Ue ₂ transmits the busy signal generated by the buzzer S ₁ to the line α by means of its winding II, so that the calling subscriber perceives this signal in his receiver and gives up the connection. At the same time, the following circuit is closed: battery, winding II of Ue ₂ , low-speed interrupter U ₂ , high-resistance Wi ₂ , switching arm of GW, contact d _s , line α-, windings of relays F and H, earth. In this circuit, only the relay H responds, while the low current through this path is not sufficient to energize the relay Y. The relay H short-circuits the winding I of the relay Y at its contact h ₂ and switches on the lamp L via its contact H ₁ and contacts 3I ₁ and ^ ₁ , so that it flickers according to the alternating excitation and de-excitation of the relay H. . If the voter subordinate to the group voter GW is another group voter, the occupancy of all

Connection lines of the desired contact row indicated by the lamp L in the same way as just described for the line selector LW . In this case, the excitation of the relay H takes place via a wave _{contact similar to W 2} , which is closed after all contacts of a contact row have overflowed, and via the resistor Wi ₁ and the slow breaker U ₁ .

ίο It is now assumed that the requested subscriber is free and answers after receiving the callsign. Now the relay Y is excited in series with the windings of the relays H and RA via the following circuit: battery, winding of RA, contacts a ₂ and ci ₄ , now closed through- contacts of the line selector LW, line loop of the called subscriber, contacts / ,,, Line «, winding I of relay Y and winding of H, earth. Now the relay Y responds and closes a holding circuit for its winding II at its contact y . As soon as the called subscriber hangs on his receiver after the call has ended, the relay H drops out, while the relay Y via its winding II and the one just described Holding circuit remains energized. Now is the normally closed contact A ₁ and the normally open contact V ₁ a circuit for the

Lamp L closed. This circuit remains in place until the calling subscriber hangs up his receiver. Then the relay A drops out and opens at its contact a, the circuit of the relay B. This

₁
interrupts the holding circuit for the winding of the relay Y at contact b ₁ and removes the earth from test wire c , which characterizes the occupied state of the connected connection line. Aiii contact V ₁ , the circuit for the lamp / is interrupted, while at the contact α _Λ via the contact b _a and the

Head contact k _{? J} the release magnet M of the group selector GW is actuated, which returns the group selector to the rest position.

Claims (4)

Patent claims: 1. Circuit arrangement for monitoring connections in telephone systems with dialer operation, characterized in that a monitoring character (L) assigned to a dialer is controlled by switching means (W ₁ , B, H, Y) which come into effect during the production and the existence of a connection that his mode of operation gives a clue for determining the current status of the connection. 2. Circuit arrangement according to claim i, characterized in that the switching devices (H, Y ) dominating the monitoring symbol (L) are controlled in part by connecting devices (LW) downstream in the connection setup via the memory line (e.g. via a wire a) . 3. Circuit arrangement according to claim 2, characterized in that a member of the switching devices (H) is brought into effect in various ways depending on the state of the connection and brings about the output of a corresponding signal. 4. A circuit arrangement according to claim i, characterized in that different states in the development of the connection set-up, which differ from one another by operating states of the selector that differ from one another, are expressed in a similar manner by the monitoring sign (L) assigned to the selector. 1 sheet of drawings