DE1537880B2 - - Google Patents

Description

3 4

directional conductor connected to the lines and the connection unit, the control

let switch means to arrange a transistor, through aderc known as a sign of negative potential

the sensitivity of the starter circuit, which the diode Dl of the OR circuit Od in

is increased by means of. transferred to the lock state. Are the di-

However, it is not easily possible, these 5 dull Dl of all inputs P of the OR circuit Od in

known starting circuit for call seekers also for their blocking state, so the transistor remains

the reversal of the search speed is blocked at a T 1.

Selector star device according to the German layout For each input Q is one through an output

font 1 214 741, because namely the input 51 to S η of the search dial Su controlled identified

Call states do not occur through potential-changing gate circuit Jd with diodes D 4, D 5, the

changes of a voice wire, but the control wire c resistor R 7 and the transistor T 2 provided,

is displayed so that the on the speech artery with each passage of the with the base electrode

Initiation of the call connection occurring Po- of the transistor Γ 2 connected output 51 to

change in potential does not disconnect the starter switch Sn of the search selector Su , the transistor Tl

can. * 5 and consequently also the diodes D 4, D 5 are conductive

In the German Auslegeschrift 1126939 in the ERT. If the control wire c forth negative Freipo-

described coupling arrangement for selector star over- tential, this can be done via the resistor R 8

Transmissions are cyclically reaching through the connection to the base electrode of the transistor T 3,

units querying the search dialers that the call belongs to. This belongs to the npn type, so it will be

would not stand characteristic changes in potential of the ao blocking state due to the negative free potential

Control core c evaluated. Affected after switching through.

a connection unit is the potential change In addition, the control wire c is not described here with the help of a rectified manner during the alternating voltage taking place at this time for the evaluation device without slow running of the search selector Su with the help of influencing the switching functions of the line selector 25 transmitted to the selector star switch, the just gelers undone. checked connection unit characterizing signals

It is the object of the invention to eliminate the cumbersome subscriber line connected there

Application of a change in potential other than active one after the other to the presence of outgoing contact

The rectified AC voltage setting the call status is checked and the call access determined there

for the reversal of the search speed, dispatched in a known manner,

avoid. The same arrangements are used. For incoming call states, on the other hand, the

to switch off the change in potential in the dispatch department is considerably accelerated.

Speed reversing device used, namely occurs with a connection unit TS

which is also responsible for switching off the change in potential call state, so is done by the facilities

in the facilities for identifying the call- 35 of the exchange VSTW the free potential of the

the connection unit is used. Control core c eliminated in a known manner. It is coming

The invention is characterized in that on this via the resistor R 1, the diode D 1 and

the control wire of each connection unit via a respective base-emitter path of the transistor Tl

Resistance both an input and by means of its current flow, which conducts the transistor T1

Output potential reverses the search speed - 4 ° controls. The associated change in potential

The OR circuit as well as an input of its collector electrode K causes the reversal

the line units respond to incoming calls to the search speed of the search dialer Su,

status test and with an output of the search, for example, by the fact that the frequency of one of the

Selector connected gate circuit are switched on search selector driving generator on a higher

and that the effect of the incoming or 45 ren value in a manner not to be described in more detail here

outgoing call states on the control wire is redirected.

the potential change that occurs, the free- The interrogation signal of the search selector passes through

state simulating potential to which the connection after the position just assumed

unit assigned inputs for the duration of each subsequent output terminal 51 to Sn with

existing connection of the connection unit at 50 increased speed until that of the calling party

a main line can be switched on. Terminal unit TS assigned input terminal Q

The invention is explained using the circuit diagram in which is sufficient. From this point of view, no negative free pass is

that is only important for the understanding of the invention via the diodes D 4, D 5 and the resistor

essential switching means are shown. R 8 to the base electrode of the transistor T 3

Each fert via a subscriber line to the 55, but a the document state characteristic line concentrator WS connected subscriber zero potential, which controls the transistor T 3 conductive, spot TiN The signal appearing at the collector electrode A from terminal unit TS assigned in the exchange VSTW one that The value signal is fed to the search selector 5m and leads α, b, c to a coupling arrangement KF which causes it to be shut down. As a result, the transmission unit W-Ue can now be connected. A signal characterizing this connection unit TS can be transmitted to each connection unit TS with the associated star switch WS when the subscriber station TIn is connected via a main line, the connection HL is connected in a known manner. a voice connection between the connection input

The control wire c of each subscriber circuit TS is called TS ~ to the subscriber line assigned to it

is via a resistor R 1 an input P of a 65 via a main line HL and via in the dialing

Call status recognizing OR circuit Od star transmission W-Ue and in the selector star switch

and via the resistor R 3 the input Q of a WS provided coupling devices,

identifying gate circuit Jd connected, with this connection also the actuation takes place

generation of the contact d of the coupling device KF in the selector star transmission W- Ue. It is applied to the points P and Q via the contact ^ negative potential via the resistor R 6, the diodes D 2, D 3 and the resistors R 2, R 4. This negative potential simulates the idle state of the line unit TS for the OR circuit Od as well as for the IDE gate circuit Jd, so that the line unit cannot be falsely identified as calling during the duration of the call. Because of the arrangement of the decoupling resistors R 1, R 3, the potential simulating the free state has no influence on the facilities of the exchange VSTW.

1 sheet of drawings

Claims (3)

1 2, ter connected subscriber lines Patent claims: each with a main line with the associated, in the dial star transmission of the switching 1. Circuit arrangement for the preferred point provided connection units can be connected Handling of incoming traffic in 5 are in which one in the dial star transmission to telephone systems with selector star devices, ordered, cyclically revolving search selector by means of which the impulses connected to the selector dial switch at different times are connected Subscriber lines over each terminal units for the presence of an arriving one Main line with their assigned, checked in the call status and at the same time by means of the dial star transmission of the exchange io one transmitted to the dial star switch, the provided Connection units are connectable, just tested connection unit characterizing Sibei to which one in the dial star transmission starts the test of the connection unit assigned there cyclically rotating search dial with organized subscriber line on the Vortels An outgoing call state causes and impulses of different temporal positions the connection units for the presence of a 15 in those of the connection units with a for checks incoming call status and the same error-free transmission of the identifying signal in a timely manner by means of an excess and error-free test in the star selector switch, the line unit being tested sigen search speed testing search dial Characteristic signal there is the check of the presence of an incoming call status the line unit associated subscriber line 20 and up to its identification to an increased Closing line can be reversed to the presence of an outgoing search speed. Calls condition causes and in which the by the German Auslegeschrift 1214741 is Terminal units with a for error-free over a selector star device known, in which for the carrying of the characteristic signal and error detection and identification of incoming andi «free checking in the selector star switch permissible 25 outgoing calls as well as for the control of the search speed checking search dialers when switching through the calling or to Calling partial presence of an incoming call status subscriber lines to their assigned and until it is identified on a terminal unit of the exchange only a higher search speed can be reversed, preferably in the dial star transmission, characterized in that 30 neter search dialers are provided. Its permissible control wire (c) of each line unit (TS) over each search speed is in itself limited because it has a resistance (Rl; R3) as well as an input ben the test of the line units on from the (P) one, by means of, their output potential (K ) switching office, incoming calls also the search speed umsteuernden OR being tested terminal unit characteristic Si-circuit (OD) and an input (Q) of the 35 gnal to send out line concentrator and terminal units (TS) has to wait for incoming call, whether the statuses in the selector star switch and with an output (S 1 ordered test device the presence of a down from Sn) of the search dialer (Su) connected Tor- henden call status of the associated subscriber circuit (Jd) are switched on and that a determines the merline. Effect of the incoming or outgoing 40 With such an arrangement, however, the call statuses on the control wire (c) can occur - switching through the incoming calls against the potential change, the free over the outgoing accelerated and preferential simulating potential (-V) to the are, for example, by the fact that when the line unit arrives, the input (P, Q) of a call assigned to an as yet unknown call increases the search speed for the duration of each existing connection of the line unit in such a way that the line unit (TS) with a main line is checked overflowed (HL) can be switched on. Subscriber lines assigned to connection units 2. Circuit arrangement according to claim 1, on the other hand in the selector star switch because of the one characterized by that for the connection of faultless signal transmission insufficient Uberdes the free state simulating potential per 5 ° transmission bandwidth or for other reasons under one contact (d) of the connection unit (TS) remain. If the search dialer has found the calling subscriber and the terminal unit assigned to the main lines (HL) , it is provided in known crosspoints (KF) . Way shut down so that he marked the and 3. Circuit arrangement according to the Ansprü- through-connection of the coupling devices to the zuchen 1 and 2, characterized in that the 55 ordered subscriber line can cause
simulating free potential ( -U) over each one It is known per se, in starting circuits for series connection of a resistor (R 2 or caller when a call condition R 4 occurs) and a diode (D 2 or D 3) to the all lines common starting switch points (P or Q) can be switched on. to be addressed, each with a speech artery 60 of the lines are connected via directional conductors, who after checking a call seeker on the ru- running line by applying special potentials, to occupy a high resistance to the line and thereby the separation of the line from The invention relates to a circuit arrangement 65 for causing the starting device. for the preferential handling of the arriving- It is also through the German Auslegeschrift the traffic in telephone systems with dial star 1 037 522 became known, between the over ever facilities in which the dialing star switch has an ohmic resistor with one voice wire each