FR2541541A1 - System for emitting periodic metering pulses for telephone exchanges - Google Patents

Abstract

Answering system including a generator 5 of periodic meter pulses, preferably rapid-fire, characterised in that it is situated in the exchange for connecting a customer, public kiosk 1 or test device 3 which issues test calls to the said emitter in order to check proper operation of the equipment for retransmission 2 and for reception 1 or 3 of the meter pulses emitted by the said generator without cluttering the circuits 6 and the equipment of the remote exchanges 7, 8, 9 with non-profitable test traffic. The said emitter answerer is placed downstream of an outgoing junction unit 4 which endows it with universality of use since it operates according to a standardised code for circuit 6. The number of pulses sent upstream can be programmed and, in this case, it orders the freeing of the telephone link after emitting the last pulse.

Description

 The present invention relates to a system transmitting periodic charging pulses at the level of circuits or junctions for telephone exchanges of all types, whether of electronic or electromechanical technology.

To counteract the proper functioning of charging bodies, Figure 1 test calls are initiated by a requestor, either automatically using test devices, 3 / or manually by agents, to devices called robots or response line . 9
The applicant can be for example a public telephone box1 whose receipt of coins introduced by users is conditioned by the receipt of tax pulses
To obtain a large number of tax pulses in a very short time, which reduces the trial time, it is essential according to the known methods, to call a robot9 located in a remote center which can be for example the center of In this case, the test calls produce unprofitable traffic that clogs the junctions, circuits, and equipment of the remote centers. 7.8.

 A particularity of the invention according to FIG. 1 lies in the fact that the transmitter of periodic charging pulses 5 / is located in the same center as the applicant, and therefore does not produce, by the traffic received, the congestion above. The aforementioned equipment, trunks and circuits are available to sell the profitable subscriber traffic.

 In accordance with the invention, the system transmitting periodic charging pulses 5 / is placed downstream of the trunk, which gives it universal use because it operates according to a standard code for circuits or junctions. It can therefore equip all types of telephone centers whatever their technology, electronic or electromechanical, the standard code online is the same.

 By its design, according to the invention the number of charging pulses sent to the applicant can be sorted or programmed in advance and in this case the release, or hang-up requested, is carried out by the issuer of tax invoices. after issuing the last impulse, that is indefinite, and in this case the demand for release is effected by the plaintiff when he has received the number of impulses he desires.

may be
at frequency of the tuning pulses determined according to the invention by the transmitter.

 According to the invention, one or more transmitters of periodic charging pulses can be installed in the same telephone center, the installation is limited to the connection and the creation of a road inside the center to be there. connect.

 An embodiment of the invention is described below by way of non-limiting indication with reference to the accompanying drawing.

The periodic charging pulse transmitter system chosen for the exemplary embodiment uses the standardized code called the grouping center (CG) whose various signals are summarized in the following table.

<SEP><SEP> Summary of <SEP><SEP> Signs of <SEP><SEP> Code <SEP> Center of <SEP> Grouping
<tb><SEP> Time <SEP> of <SEP> the <SEP> pulse characterizing <SEP> the <SEP> signal
<tb> Type <SEP> of
<tb><SEP><SEP> signal <SEP><SEP><SEP><SEP> remote <SEP> group
<tb><SEP> -r <SEP>
<tb><SEP> Taken. <SEP> 90 <SEP> to <SEP> 110 <SEP> ms
<Tb>

Invitation
<tb> | to <SEP> traqnsmettr <SEP> 90 <SEP> to <SEP> 110 <SEP> ms <SEP>
<Tb>

numbering <SEP> 50/50 <SEP> ms
<Tb>

<SEP> End <SEP> of
<tb><SEP> selection <SEP> 90 <SEP> to <SEP> ms
<Tb>

Subscriber <SEP> free <SEP> call back <SEP>
<tb> Response <SEP> 108 <SEP> to <SEP> 132 <SEP> ms
<Tb>

requested <SEP> Periodic <SEP> pulses
<tb> Taxation
<tb><SEP> 500 <SEP> to <SEP> 750 <SEP> ms
<Tb>

applicant
<tb> Hang up
<tb> asked
<tb><SEP> 1250 <SEP> to <SEP> 1875 <SEP> ms
<Tb>

<SEP>
<tb> occupation
<Tb>
Before delineating in detail the structure of the issuer of periodic tax incentives, figure 2 is indicated below the elements that compose it - a tone generator.1 of recognition which gives the assurance to the claimant that his call has arrived on the system emitting periodic pulses of taxation, it can be replaced by a talking machine.

a clock providing calibrated signals necessary for the circuit code CG, and having two outputs, on the one hand 110 milliseconds, duration of the charging pulse, it is the signal R, on the other hand the inverse signal H whose duration is 1.6 sec.

- a pulse counter.3 which allows to control the release after the emission of the last programmed pulse, its use is optional - seven electromagnetic relays whose function is
C - release control
CT - counter
L - release
M - maintenance
NP - pulse phasing
R - Reception
TR - Transmission Connection
It requires 4 wires, the wires Z and b carry the recognition tone, the signal wires, Reception (Ron) and transmission (Tron), the supply can be provided by a source available, an autonomous power supply can be used .

Referring to FIG. 1, the system for transmitting periodic charging pulses is according to the invention connected to the circuit level downstream of an outgoing equipment which is generally called a trunk. The phases numbering and callback of the code are unused
Transmitter socket
The applicant having performed the route-determined dialing that was built in the center, the trunk assigned to the tax-pulse transmitter is taken, and, it issues a 100 ms tap pulse (GG code) that emitter receives in the form of a positive polarity on the wire n, the relay R is excited and by its working contact r1, causes the attraction of the relay M on the discharge of the capacitor C1, previously energized by the intermediate rest contacts r1 and tr1. At the end of the pick-up pulse relay R drops and relay M is maintained by work m1, rest rl and tr 1. By the work contact m2, relay L is excited and maintained by work 11 and rest tr2.

Phasing clock signals
By work M3 the relay NP is presented to the clock output P, it is excited if the position in the time of H provided a positive polarity, ie at a time where H is inactive.

A phasing is thus obtained which avoids presenting the relay TR over H at any time with the risk of shortening the invitation pulse to be transmitted. By the working contact mpi, the relay
TR is therefore attracted for 110 ms and by his work tr2 he sends a positive polarity of invitation to transmit on the end Tron.

Emission of periodic impulses of.tax
The relay MP being kept at work by its work mp3, rest and work 12, the relay TR will get excited at the rate of the clock H, and 1.6 sec. after the invitation pulse to be transmitted, sends, always on the wire Tron the end of selection signal provided in the code, after 1.6 sec. it sends the first tax impulse which is interpreted upstream as answer and tax, the following tax impulses are sent at the same rate.

Pulse count
If it wishes to count the number of tax pulses sent, the AC switch will be set to connect the counter via job L3 to job tr1 which is set for 110 ms. with each sending of charging pulses
As soon as the counter reaches the programmed number of pulses, the CT relay is excited and at the end of the last tax pulse, the -relay C is excited by work ct2 rest tr3, work L2, and is maintained by work cl
Release after counting
By work c2 the counter is reset to the next pass of H, the relay CT drops, the NP relay cuts through the opening of the rest cl falls and the relay TR presented on H by rest mp1, work c3, rest ctl s excites for 1.6 sec. and by its working contact tr2 it sends on the wire Tron the requested pickup pulse which causes the release upstream.

 Relays M and L fall off respectively by the opening of tr1 and tr2 rest for 1.6 sec. more time than their delay in release which is 20C m.s. At the end of relay T R relay C falls at the opening of work tr4.

Release without counting by the applicant
The count of the number of pulses that do not affect the counter is disabled by the switch ÂC. The link is released by the calling party who hangs up and causes the transmission of the corresponding 500 ms code signal which is received by relay R.

Relay M which has a delay of fallout of 200 m. relaole rest ri being open for a time greater than his delay.

 at rest m4 relay C is excited and the release pulse is sent upstream as in the oas of counting tax pulses.

 Of course, the invention is not limited to the exemplary embodiment represented by FIG.

2 Thus it is possible to use other technologies9 to replace the relays by electronic circuits. It is also possible according to the invention to use codes other than the centering code (CG) which has simply been preferred.

Claims (1)

 1 - System transmitting periodic charging pulses (5 fig 1) for call centers for sending to a caller, public booth (I fig 1), subscriber station, or test device (3 fig 1), located upstream, fast rate pulses intended to control the correct operation of the equipment for retransmission (2 fig I) and reception (I or 3 fig 1) of the charging signals, characterized in that it comprises a clock (2 FIG. 2), an identification tone generator (I FIG. 2) which can also be taken from the outside, and switching means providing reception (R), switching

 in phase (NP) and transmit / code signals, and the hold and hold memory functions (M) for disposing said periodic charging pulse transmitter in the same home exchange as said caller, 2 - System transmitting periodic charging pulses (5 fig l) according to claim I characterized in that it comprises a pulse counter (3 fig 2) for programming the number of tax pulses sent to the upstream and switching means controlling the release (L) of the telephone link.