DE1512949C3 - Method for reducing the throughput of characters in dialing switching systems with routing - Google Patents

Description

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The direction »key figure path« (namely to the central

statement leads. . central exchange ZVS 7) is always clear if

The method according to the invention is characterized first in the main switching center HVS 72 that the individual dialing characters of an appropriate dialing character neither as a step combination of routing information nor the digits 4, 7 and 0, nor as another admitted forward when the first dialing character arrives is recognized in a new character such as Zi, ZL , etc. If the exchange is bit-by-bit on the basis of the number 4, namely the first dialing character, then the possible step combinations can be based on the network structure - both the end exchange EVS 431 or a comparison list containing the dialing characters main exchange HVS 43 or HVS 47 or even before receipt of the complete in each case Dialing io the central switching point ZVS 4 can be reached, information can be recognized and that the further- If the first dialing character is the number 7, it depends on whether the dialing character can be a clear route statement as one of the end switching points EVS 723, EVS Specifying character 728 or the central exchange ZVS 7 has been recognized or not. be rich. In these two cases you always have to

Such a comparison list therefore contains the bit 15 further dialing characters are evaluated. On the other hand he

pattern of all step combinations of the dialing characters gives a clear directional statement if

that come into question for this exchange. the first dial character is a zero.

The information in the comparison list of an exchange should be assumed for further explanation

existing step combinations, on the basis of which the digit 6 arrives as the first dialing character,

an incoming dialing character is evaluated bit-by-bit and ao This assumption is the fig. 3, in which in

is recognized, correspond, for example, to those for the first line (Ek) from the exchange,

se switching center in question combined - in this example the switching center HVS 72,

functions of the CCITT telegraphy alphabet No. 2. Since received step combinations are shown,

an exchange in a dial-up exchange In the second and third lines are those on one

network has ascending and descending lines, 35 outgoing line sent (Sg) and from this

is hierarchically structured, in the case of a line received (Eg) step combinations are shown.

Dialing character that is considered not to be placed in the comparison list. The first dialing character reaches the beginning

is recognized, which at the next higher Ver of the start step at time t 1 the switching

agency leading agency known as the key figure path. Due to the shown in FIG

Connection line busy. In the case of a comparison list as shown in the third step, the

Comparison lists of the exchange contain time 12, the first incoming dialing character as

Known dialing character is a clear way out - a "character not present in the list is recognized,

say available and the dialing characters are in the what in the exchange to occupy the identification

the connection direction determined by this leads to the payment path. Hits after a certain period of time

the speaking exchange. 35 of the mediation reached via the indicator

By the method according to the invention, dialing station a call confirmation signal to evaluate character by bit and already before receiving a certain pause at time 1 4 a selection of a complete dialing character also bit-by-bit again character request signal, which consists of a start step, forwarding, above In addition, the possible steps and a one-and-a-half blockage that exchanges that exist in the course of the 40 step follow. Already when the first message connection was established, during the step of the dialing character request signal, this is activated by the connection establishment. bit-by-bit evaluation recognized and at the point in time 15

An explanation of the procedure according to the Er- the first dialing signal is sent out again,
Finding and further details of the invention By evaluating bit by bit it is thus achieved in the following with reference to FIGS.

In FIG. 1 is an excerpt from a telephone exchange.

network shown, in which the connections with In the event that the first incoming dial-up

Can be set up with the help of route information. In characters based on the comparison list as a, a

In this example, main switching centers HVS 50 are a clear route statement forming criterion

evaluates and recognizes subordinate final exchanges with them, results as a rule

EVS and their superordinate central exchange between the time at which the dialing signal

provide ZVS available. The one shown on the left is recognized and the. Arrival of the following

ten exchanges is the valid code? and dialing character a period of time that is sufficient for one

for the switching centers shown on the right 55 line in the unambiguous by the dialing character

the applicable code number is 4. In addition, a direction defined in Rieh must be documented. In this case

direction zero further line available. So it comes from the one that evaluates the first dialing mark

the central switching point ZVS 7 can be a switching point already after recognizing the first

to activate another central exchange with the code number 6, dialing character. The following

namely ZVS 6, can be achieved. One for the main 60 identifiers then do not lead to any further

switching center HVS 72 the applicable comparison list is the burden for this switching center under consideration. To the

shown in FIG. It contains a combination of steps- an explanation of this process is shown in FIG

options for digits 0.4 and 7, as well as shot pellets. There are in the first line (Ek) again-

combinations for further switching control criteria that are received on an incoming line

like Zi, ZL, ZWR, WR and +. For in the main genes and in a second cell (Sg) those on one

switching center HVS 72 incoming dialing characters outgoing through the first dialing character clearly

is therefore considered to be the code path of the step combinations sent to the centrally defined line

exchange ZVS 7 leading connection path. shown. At time 1 1, the first election

5 6

character, beginning with its starting step, received in the line and in a second line (Sg) exchange, for example HVS 72. After the step sent on an outgoing line, the fifth step, the dialing combination of the dialing characters is displayed at time 12. To sign, for example, recognized as the digit zero and time 1 1 reaches the first dialing sign with a line corresponding to this direction busy. 5 the exchange begins at the beginning of its starting step, if one calculates: as the distance between the occupancy of the main HVS 72 exchange, for example. Leading line and the next dialing character a step - according to the suspension, this dialing character is a length; that is, if the corresponding line is found and occupied double stop step at time 1 4 completed at time / 3, the result is sen. As soon as the first step has arrived, this as shown in FIG. 4 can be seen, an io dialing character designated with id should, for example, at the time 12 period within which the connection to the will be recognized that it is a, over the desired line must be done if the second dialing character to be forwarded is, dialing character that is to Time i 4 arrives, meaning that the first dialing character in the comparison list is to be sent on on this line. In the- does not exist. Simultaneously with the detection of this case, the 15 lying in the course of the connection is already occupied by an HVS 72 outgoing exchange in the direction of the code path after the first line. According to a development of the ErWählzeichen be unlocked again, whereby the invention is proposed that the load for this switching center to be considerably further transmitted in this direction dial characters not only after reducing. , ■ hit a polling signal to send out,

When following the method according to the invention but already after encompassing a step length, premature switching through but also sending waiting time with the transmission of the individual is possible when the dialing characters begin above the identification steps of the first dialing character. Must be forwarded in the form of payment. This in Fig. 5 occurs at the time the 3rd 1 This possibility lying on the framework of the invention is then sent to the outgoing line selection characters entvorteilhaft applicable, however, if the dialing information to then 25 holds only a simple stop step. On the incoming line with small interruptions, the third dialing signal will be sent at the timing, for example with a double stop step at t 8, before the fourth dial reception is received, but on the outgoing line with a sign at time 19 on the incoming simple stop step is sent. By the bit line arrives. As can be seen from FIG. 5, wise evaluation according to the invention of the individual 3 "arises in this way between the points in time denoted by f 8 and f 9 of an incoming dialing information item denoted by td , as described, an outgoing direction very much The specified shortening of the path in switching center HVS 72 is sufficient Activate the switching center reached by catching up and the subsequent dialing character, in. '"' JL. In this example the fourth dialing character can be used directly

This further development according to the invention will reach the outgoing line. In this hand, too, FIG. 5 explained. There are again in the case so the load for the said operator of a first line (Ek) has been reduced to an incoming telephone line.

1 sheet of drawings

Claims (8)

1 612 1 2 direction assigned line occupied and one patent claims: through-connection to the switching center that can be reached via this line before reception 1. Procedure for reducing the character of the complete election information carried out throughput in dialing exchanges with control 5 and that the forwarding of the following Wegslenken, with facilities for evaluating dialing characters directly, that is, without intermediaries Incoming dialing characters are available in storage in the said exchange which one happens due to the combination of steps. incoming dialing character it is determined whether the direction indicated by the dialing character OK is reached via the code path, i.e. the dialing character itself to find the direction.
The invention relates to a method for dialing characters already in the considered switching center.
leads, characterized in that, in addition to the dialing switching systems, in which the individual dialing characters of a routing information of the called subscriber is reached immediately after dialing the dialing information contained in the last dialing digit and which are therefore referred to as the first dialing character in a switching Difektwahlsysteme, injury point are known bit by bit on the basis of one all based on 20 averaging systems in which the subscriber first sends the entire step combinations possible for the network structure, dialing information is then converted in the comparison list containing the dialing characters using a special setting record and one before the complete dialing connection is received can only be recognized on the basis of the information provided in this way and that the advanced electoral information is built up. Broadcasting takes place depending on whether the voting system therefore draws such voting systems as an indirect sign as an unambiguous route statement for controlled voting systems. This includes, for example, the character indicating the switching center, also showing the switching systems were or were not known to be routed. steering. With the indirectly controlled voting systems 2. The method according to claim 1, characterized in that it is a disadvantage that the dialing characters in the that in the case of one of the 30 individual exchanges for the on-comparison list a switching center find a suitable way cached Recognized dialing character, the retransmission via and either after conversion into special commands, one in which must be forwarded through the so-called key figure or directly. The way Connection leading to a certain direction several times in the course of a connection setup The line to the next higher exchange will increase the number of characters. rate, the control occupancy period and the delay 3. The method according to claim 1 and 2, characterized in time, including the time from the end of the choice of a characterized in that for retransmission in the calling until a called part is reached understands the key figure path in a certain direction. A large throughput of characters and the dialing characters in the exchange between 40 a long control occupancy period mean syschenge saved and about a large amount of money depending on the workload and storage costs Detection of a busy line after a pull-in time means increased losses due to too long Reception and bit-by-bit evaluation of a dial-up line seizure. character polling signals are sent. It is used to reduce the character throughput 4. The method according to claim 1 and 2, characterized 45 already been proposed by a participant marked that the forwarding of the voter incoming election information only in the display to be temporarily stored and assigned via an exchange switching center after it has been recognized Line immediately after the assignment because of the next exchange that is in the course the line happens. the connection is established, only the dialing 5. The method according to claim 1, characterized in that 50 characters are passed that are not already marked as one, that in the case of one than in the clear led route statement. This match list an exchange contain shortened forwarding of dialing characters means for knew the forwarding of the following calling subscriber a shortened form of the dialing character: dialing characters over a line in delay time. Direction of the unambiguously recognized connection 55 The invention is based on the object of. pathway happens. Character throughput and the control occupancy time: 6. The method according to claim 1 to 4, thereby reducing even further. characterized in that the retransmission of the dialing To solve this problem, the invention is happens character by bit or character by character. from a process to reduce the time 7. The method according to claim 1 to 5, characterized in ⁶ ° ch throughput in dialing exchanges with Leit characterized in that in a bit-wise routing, with devices for evaluating de; Transmission of dialing characters The forwarding with incoming dialing characters is available, in which one occurs compared to the received dialing characters on the basis of the step combination of a shortened stop step assigned to the incoming one. Dialing character, it is determined whether the through da: 8. The method according to claim 1 and 7, characterized by 65 dialing characters indicated direction over the identifier indicated that when one is recognized, a single-digit route is reached, the dialing character itself as? dialing to find the direction will be forwarded directly: character in an exchange one of these should, or whether the dialing character is already in the view