DE1947688B2 - CONTROL ARRANGEMENT FOR A TASI SYSTEM - Google Patents

Description

The invention relates to a control arrangement for a message transmission system with time multi

a5 plex multiple access for speech interpolation, below labeled with the TASI system. A TASI system enables a multiplex communication link taking into account the fact that conversations are often interrupted, other

would speak during this rest period and thus a utilization of the channels according to the principle the time division in order to save on the number of necessary transmission channels. The high cost the channels of communications systems such as satellite communications links and Underwater cable communication links can be significantly reduced by applying the TASI principle will. For this reason, the performance of communication systems is so far

has been increased by the use of TASI arrangements when making calls over expensive wide area telephone channels were led. According to the prior art, frequency division multiplexed channels are used the main channels to which the TASI

Principle can be applied, and it is mainly impu'.amplitude modulation in the Part applied in which the switching process of the TASI control is carried out. With the development pulse code modulation, d. H. from PCM

Systems, but international PCM channels were set up in which the TASI control in PCM system can be done.

In the TASI system, the switching is required to be done at high speed because the Channels can be switched depending on the call status of the switched connection (cf. For example, the German Auslegeschrift 1 077 262. For this reason, switching with electronic Speed executed regardless of the channels whose degree of utilization is to be increased. When the channels carry analog signals, it is generally necessary to use a modulation and Provide demodulation device in order to only carry out the switching (German interpretation document 1 072 656), however, in the case of PCM channels, such a modulation and demodulation device is used not required, and therefore the latter arrangement is economical

3 4

much more advantageous. If S and N are ground-processed via coded signals with a communications satellite, the importance of stations A, B ... N increases. As Fig. 1 shows, the memory is extraordinary, and in the case of signal trains BX, B 2 .. .BiV from the ground stations of a PCM-TASi arrangement, the amount of memory A, B ... iV is seeded in certain time slots, from a very important element that transmits the costs of the 5 to the communications satellite S and influences them by order. The object of the invention is to receive every ground station,
based on a TASI control using Fig. 2 shows a sequence of signal trains transmitted for reporting a minimum number of memories to enable satellites S, and according to borrowed. remote Diagmim is a signal train Bl from the case of the application of the TASI-arrangement, it is ίο ground station A during the time interval ti and necessary to send out information indicating the a signal train BAT from the ground station iV while corresponding relationship between the transmitted time interval IIA , in such a way that subscribers connected to the busbar and the signal trains on the satellite do not represent each other's TASI channels, or information can overlap. These signal trains are sent that correspond to the change of the corresponding 15 further repeated with the sampling period T of the relationship, that is, so-called time division arrangements are sent out, and this repeat TASl information in addition to the voice information is called a frame *
available. This TASI information is, however, each signal train contains a substantial amount of speech information, and therefore, and control information and the TASI information when the TASI information and the speech information form part of the control information. An example of a signal train B is shown in FIG. 3, the voice information is limited, in which CH the voice information on the TASI and it is impossible to transmit a large amount of voice channels CHI, CH2 .. .CHn and P the control information. The invention denotes information. The TASI information TS is therefore also intended to solve this problem with very little effort as part of this control information P. sent.

According to the invention, the object is thereby achieved. The TASI information broadcasting arrangement can solved that multiple memories for storing the in an arrangement in which the TASI information to TASI information is made on the sending side according to an information train that shows Spruch 1 or also on the receiving side according to 30 whether the busbars are assigned to the channels Claim 5 are provided, which are sequentially or not, and divided into an arrangement according to the intended use and under, in which the TASI information only contains the content Distribution of the transmitted TASI information of the change in the corresponding relationship between several time intervals can be used. Advantageous see the busbars and the channels Embodiments of the control arrangement provided. The former arrangement is called state-of-the-art of the invention are in claims 2 to 4 signal arrangement and the latter as amending and 6 specified. . Signal arrangement referred to. The status signal-The invention is exemplified below under the arrangement itself can be converted into an arrangement in which Described with reference to the drawing; in the state of assignment of the busbars to this shows 40 the channels are sent out in a frame, and FIG Communication satellite link, this state in a plurality of parts on-Fig. Figure 2 is an illustration of a signal train split into a plurality of frames a communications satellite. Furthermore, each of these F i g. 3 shows the details of one of the two latter: arrangements in an arrangement. Signal train in which the same state signal is only off-F i g. Figure 4 is a block diagram of one embodiment and is broken down into an array Invention, in which the same state signal repeatedly off-F i g. 5 a block diagram of another is sent. The latter arrangement can des implementation of the invention, 50 further in a system in which this signal from-Fig. 6 timing diagrams that are sent differently by adding a parity check to this Information, code or an error correction code is added to the FIG. 7 is a block diagram of details of the correct information found on the receive / send_e device, ropes regenerated and used as an effective TASI signal i g. Figure 8 is a block diagram showing details of 55 and broken down into an array Discriminator, in which the same information is odd Channel status memory of the transmitting device, acceptance of the logic of the decision by the F i g. 10 is a block diagram showing details of the majority of effective TASI information with the Receiving device> .; nd 60 largest number of voice information received. the 11 is a diagram for explaining the arrangement in which the same state signal only Channel status memory of the receiving device. once sent out contains an arrangement at While subsequently a satellite message sender an additional code or an error correction code connection to which the invention is applied is added to the status signal. The change described The invention can of course also be implemented in an arrangement also in the case of an underwater cable message, in which the information regarding the change connection or the like. Can be used. tion of the corresponding relationship between the F i g. Figure 1 shows a satellite communications link busbars and the channels in a frame

is sent out, and divided into an arrangement core memories, magnetic thin-film memories in which this information is stored in a plurality of or integrated circuit memories. 60 is a is divided by parts, which are in a plurality of means for pulse code demodulation and for sent by frames. Each of these speech information retrieval is better known Regulations can be converted into an order in which 5 Art.

Change signal is sent once, and in Fig.4 shows an embodiment in which the

an arrangement can be divided in which this voice information is transmitted several times from m busbars 17-1,17-2 signal. The invention ... 17-m on the side of the station A are each allowed to the various corresponding m busbars aforementioned 27-1, 27-2 ... waveforms in the TASI-io Informationssendeanord- 27-m on the side the station B using tion, however, an execution of η TASI channels (m> n) will be transmitted, form of the invention described below, however, in the case of a communication link, the status signal is recorded between more than two Stations A, B ... N the TASI information in a plurality of frames invention with the one shown in FIG. S is divided and an error correcting code in Fig. 15 can be implemented. According to Fig. 5, there is a broadcast is added. mutual connection between the collective

F i g. 4 shows an embodiment of the invention, rail 17-1 on the side of station A and in the case of the busbar 27-1 on the side of station B for a better understanding of the invention, communication link only between the ground between the busbar 17-2 of station A and stations A and B of Fig. 1 is executed, that is, the busbar 27-2 of station B and mix the voice information from ground station A to the communication rail 17-m of station A and they all become the ground station B directed. In Fig. 4 busbar 97-1 of station N. In the same way, 15a, 156 ... 15 / and 25a, 256 ... 25 / each have a mutual connection between subscribers on the side of station A or on the busbar 27-m of station B and that of the side of Station B. 17-1, 17-2 ... 17-m and as busbar 97-2 of station N. Furthermore, 27-1, 27-2 ... 27-m are each busbars a mutual connection between the Busbars on the side of station A or B, and there are rails 97-m of station N and one busbar m busbars on each side. There is another, not shown in the drawing, there is a mutual connection between 17-1 station. From the η TASI channels. those and 27-1, between 17-2 and 27-2, ... and between 30 are assigned to station A , ρ channels with 17-m and 27-m, with no connection between station B and q channels with the station Λ ver-17-1 and 27-2 or between 17-2 and 27-m. Part of the TASI can be set in the same way. The subscribers 15a, 156 ... channels, which are assigned to station B and station N to -15 / or 25a, 256 ... 25 / and the busbars, are connected to station A , and the 17-1, 17-2 ... 17-m and 27-1, 27-2 ... 27-m are 35 other part is respectively connected to the terminal N and the Sta · under arbitrary combinations by the B tion. Switching devices 16 connected by dividing the busbars. 18 is one of each station and the TASI device assigned to it for pulse code modulation and time 'channels in a plurality of parts and by multiplexing the voice information from their connections with the other stations, such as bus bars, for which a known device 40 described above, it is possible an arrangement can be used. 10 is a voice information similar to that of FIG. 4, as described below in the tion memory for information switching with individual. Addresses, the number of which is equal to the number of TASI- To the arrangement of Fig.4 in detail

Channels is ie with η addresses. This memory will explain, next is the information train, consists of the core memory, magnetic thin-layer storage or integrated circuit memory sent by the PCM modulation device 18, and the information train (S1), which is to become and the mode of operation of this memory of station B , described below with reference. 8, three sets of FIG. 6 are described. Fig. 6 (a) shows a PCM channel status memory with addresses, the number of which signal train from busbars 17-1 17-2 17 - ">, equal to the number of busbars 17-1, 17-2 _S o in synchronism with the frame time setting -... 17-m is, ie with m addresses for storage, signals by the PCM modulation device 18 whether the TASI channel is scanned and coded as assigned to the busbar, and the diagram is or not that the information from the Sarnmel memory, magnetic thin-film memory or rail 17-1, 17-2, 17-m is in each case in TRKh integrated switching memories, the mode of operation of which is 55 TRK 2 ... TRKm 53 is each of the busbars of Fig. 6 (α) in the speech-language information memory for the information state S or in the idle state " P " and switching with addresses, the number of which is the same as the TASI channels are only assigned to the busbars -Number de r TASI channels is, ie with π addresses. wise men who are in a state of speech; This memory also consists of KemspeiclKni, 60 channels send one after the other according to the sequence of magnetic thin-film memories or integrating busbars, in such a way that the information is connected to circuit memories whose mode of operation is further illustrated in FIG. 6 (α) is described by the PCM-Mwlulaüonseinrichunten. 58 smd two sets of device 18 are combined, as shown in Fig. 6 (0 Kimalsta ^ dsspeicheni with addresses, the number of which is shown, and transmitted to station B. TS equals the number of busbars 27-1, 27-2. 65 of Fig. 6 (c) is a part of the TASI-27-m, ie only it addresses for storing whether a control signal Share TS one or nlch: and the memories also consist of signal trains Pl of a plurality of

7 8

frame SF is formed, like this 7 is a buffer register for writing from the dis-

is shown in Fig. 6 (rf) with TSl, TSl ... TSn . kriminator5 in the channel status memory8, while-

Thus, the TASI channels are preferably used as a buffer register for reading out. Collective cards assigned in the speaking state, and 10 is a voice information memory for informa-

the information relating to this assignment is switched 5 in which only the language information

to the other station through the TASI control signal functions of the busbars to which TASI channels

that have been assigned by the parts TS of the train B 1, via the buffer register 9

Plurality of frames is formed. get saved. The enrollment in these The structure of the transmission circuit for the information memory is controlled by the gate circuit 12,

information will now be explained. 7 shows an io. The information is stored and closed

Speech information memory 10 and a channel buffer register 11 under the control of the

status memory 8 of the station / 1 of Figure 4 and the gate circuit 12 transferred; an error correcting code

associated circuits. In Fig. 7 denotes the information signals through the TASI

as in FIG. 4 1, the input for the PCM signals controller 13 has been added. After sending the

from the PCM modulation device 18 and 2 the 15 TASI control signals are those in the memory 10

Output for the PCM signals, which are transmitted one after the other via the post-stored information through the

Directional satellites S are sent to station B. Sent out to registers.

3 denotes the input for the Zeiteinstellsteuer- The writing and reading of the speech signals from the transmitting side, z. B. signals that the information memory 10 will now be started in detail and represent the end of a sampling period, ao wrote. The signals at input 1 are PCM signals which are shared by the PCM through the TASI control signal in the circuit modulation device 18 to the buffer register 9 4, S, 6, 7 and 8 then compressed according to the pattern of FIG. 6 (α) without regression; regardless of whether the collective sees transferred to it, whether each busbar 17-1, 17-2 ... 17-m is in the speaking state as in the speaking state or in the idle state, or in the non-speaking state (idle state). As will be described below, however, PCM signals assigned or not assigned to the signals at the input 1 rail according to the signal information as to whether a TASI channel of each collective level is coded is superimposed in the channel. The signals at the output 2 are stored in PCM status memory 8, and the gate scarf signals which have been controlled on the basis of the TASI control signal compression 12 and are PCM signals of the information from the channel status memory 8, corresponding to the busbars which are in the so that only the speech information of those speech states, as shown in FIG Buffer register J sent 4 is a buffer register in which the PCM-35 stored voice information, mutually modulated signals of a busbar, are stored once in succession in addresses 1 to η of the voice information. The information stored in the buffer register 4 in the order of arrival will be able to be written in each time. Here, a level discriminator 5 is checked whether the modulated mutual correspondence between the address signal from the busbar exceeds the specified 40 of the voice information memory 10 and the TASI level or not, whether the busbar channels are present, and address 1 corresponds in the idle state or in the speaking state is the TASI channel 1 (CH 1), and the address π ent- and whether the TASI channel is busy, whereupon the information speaks to the TASI channel π (CHn). The voice information is transmitted to another circuit, which the information is requested from the voice information information. To the additional memory 10 read out in the following way. If a busbar is fully learned through this voice information successively starting Btskrimmator 5 zn, it is necessary to read the busbar with address 1 of the voice information memory over several frames to 10, the reading information train will monitor because a sufficiently long period of time like this 6 (c), and only that is required, but if the discriminator 5 ° voice information of those busbars that have been assigned by a single busbar during these TASI channels is occupied for a period of time, the message connection is activated of station B. At this time, the channels are disabled, and therefore, according to the invention, TASI information is provided by the TASI information of the channel status memories 8 in which adding circuit 13 in the form of the information train shown in Fig. 6 (e) adds the status of each bus in each frame 55 and sent out and registered. The written infor- The TASI information is read out as information in the next frame, a sequence of "1", "0" is sent out to show, and the new information received in this frame is whether TASI channels have the bit Positions corresponding to mation is added, thereby changing the state of all of the busbars as shown in FIG. 6 (e) shown busbars can be detected. For this purpose 60 is assigned or not. Thus, the voice information of the collecting capacity of the memory 10 can be reduced 17-1, 17-2 ... 17- # n all of the PCM- by only the voice information of the Sanunel -Modulation device 18 are stored within a time bar to which TASI channels have been assigned a period, ie a frame period, but not the voice and have not been assigned to this channel. This is a stored out, and indeed as often as the number of all characteristic features of this arrangement. Well busbars within a frame period. the circuit for generating the TASI information

9 10

mations 4, S, 6, 7 and 8 explained. 12 is a gate TASI channels, the parts A ₁ B and C circuit for controlling the writing of TASI-speaking of the busbar are immediately changed to "1", information in the memory 10 and for controlling what indicates that an assignment is available. If the total number of busbars reaches the control signals from input 3. The circuit for the total number η of the TASI channels, only the generation of the TASI information is carried out. in which PCM signals are required, recorded and stored once a TASI channel is required, a level disk iminator 5, another busbar to which a TASI channel channel status memory 8, a write buffer register 7 has been assigned, but which is in dem and a read buffer register 6, and these circuits io idle state, is visited; the signal all work synchronously with the timing control "0", which indicates that there are no assignments from input 3. Whether PCM signals are available is changed to "1", which indicates that speech information stored in the buffer register 4 there is an assignment. Thus, the stored is, exceed the predetermined level, the total number of busbars, to which TASI channels or not, are assigned by the discriminator 5, always below the total number η of the. If the aforesaid level is kept exceeding TASI channels by assigning the th, there is a possibility that the collective TASI channels are in the speaking state according to the conversation state while being modified.

If the level has not been exceeded, the possibility exists that the busbar would be described in further details with the exception of FIG. 8. In Figs. 7 and 8 state is. However, it can only be inferred that the same characters denote the same circuitry, since it is difficult to compare levels in the discriminator 5 a level, 5 ft a counting circuit, 5 c a frame control -Speech state or hibernate instantaneous circuit, sd a TASI assignment circuit and award. Therefore, the counting of the dwell time of the speech level is evaluated in a positive sense. the Tnfor- stored in the buffer register 4 and the counting of the dwell time of the idle level is transmitted mation to the level comparison stage Sa , and evaluated in the negative sense; the count in which it is determined whether this information is above both directions for each busbar of a certain level or not. Executed in the canal. A count is carried out once in every 30 status <ipeicher 8 the status of a collecting frame for a busbar is carried out, and rail is stored in a position of the address which, since the discriminator 5 is required in order for it to correspond exclusively to this busbar. Numbers for many busbars in one frame Therefore, the information of the part D of the execution, the result of the count is immediately assigned to the address position corresponding to the busbar, which is stored in the part D in the address which is stored in the buffer register 4 eventually the busbar in the Save buffer register 6 is read and an addition is equivalent When it is determined that a b by the counting circuit 5 as a function of the PCM signal corresponding to a particular collecting the result of the previous discrimination rail m a particular frame is executed on by the level discriminator 5 a. If there is speech level, a value + 2π is added to the 40, for example the result below a certain level, part D of the corresponding address. A value of -1 is given to the information of the part D when it is determined that the PCM signal has been added. If the result is above a certain level, the value is 1 from the th level, a value + In is subtracted from part D of the information. A suitable π can be added here. The result of the addition is again S ^ S ^ f ^ S ^ L Z * F * corresponding to the degree of delay required in the original location in the memory. If the result of the addition exceeds the delay time Festetelrang that the state of speech is described an »Ic in Part D; if the ——— ι f Whom1 becomes negative by executing the result of the addition, all and subtraction, as complained above,, Dc are written in part D. This processing of the value over 50 is carried out for all busbars within a busbar frame period, and the time setting

* "4""> r _a ic« «1 ™ * -" / - "^ *" ^He τΟΪ S * ^nis the processing is control of the

less ^ aIs em is a certain value, is closed- Zeiteinütellsteuerschaltung Se, which by signals

SÜL ^ f τ? « S - ^^ T ¹ - ⁵¹⁰ J ^{1 lV} i ^rest state is started from 3, determines the result of the

A TASI channel is the busbar 55 addition that has not overflowed w ^ rd immediately

assigned, which is alas in the state of speech Whether the original stiffness of the memory 8 over the

A TASI channel is or may not be assigned is stored in buffer register 7, but the result is

. . .-. too ^1enen every nfe of the addition that has flowed over to the TASI

corresponding to the busbar allocation circuit 5 rf sent This TASI allocation

ilstatussspeichers8 contains whether 60 instruction circuit Srf contains an allocation register,

[Whether or not assigned, the number of channels assigned is

£ * Λ «ί ofSSfT't L fe ^ feHt is the content of parts A, B and C, the

^ n ^ JS ^ busbar, for which one shows whether the channel corresponds to the busbar

»0., which indicates whether or not an assignment exists, is assigned along with the

has been indicated in parts A, B and C, *; Tefl D read and the result to the TASI assignment

m the speech state has entered and if the instruction signal 5rf is sent without the counting

total number of busbars which TASI channels circuit 56 to run so that the channel of the

are assigned, less than the total number η of the busbar from the content of TeOe A. B and C,

is assigned to the result of the addition and the content of the allocation register. If namely, if a channel in a collective transmission state, the content of the memory cannot be rewritten until all TASI information has been sent to the other station,

without

transferred to the catch side

i ₁

on

TASM3 ™? T threw a channel of the busbar i _S busbar to be provided ie to determine

1 AM-K.ana.visi, wira «» ~ »Vanal assignment is whether each busbar is in the speech state or

assigned D, e display of g "™ * ¹ ™« "JJ _is idle, and to save this

and to the reg * tej » ^ information for the following control, ie a

sä SSÄSt £ i

exercise, cyclically

Multiplication (25 frames) formed, and in the same

F9SS

Se through the signals of 3 ge the frame control circuit 5c of the Signabuges, ^d «. * ^ * ί

Tb C we ^e rden ^ o ⁸ ? Der
A, B, C are used by aer

adder 13 sent,

To ensure control. Λ B C

Now the ^ mode of operation of the Ίεύκ.A ,, B, C for displaying the state of the. ^ Instruction of the TASI channels in ^^^ J ^ SSi ^ S

^^ d «Triles SSgss1haltung ai ^ ^ uersignal-

in order to you corresponding to the correspond

can be seen in FIG. In the drawing, D-ST is the memory for storing the TASMnformadon in the rewrite state; SGTST is the memory for storing the TASI information in the operating state. In a given signal frame, e.g. B. a signal frame that changes in ο .τ Zeitlage / _heSadeU ^^ the status of the assignment of the TASI channels according to the above-described ^^^^^, "^ _{in the} stores, which is _used as changed. In the same signal frame, the memory C, which is in DST

afcTTStaformatiofl ^ Zh ά £ η receiving an n throw. This throws it ^^ i with signal-

only one

eme uni

J ^ no £ ^ J ™ to the

Wn Her TASI-Ii iformation, which now co-SS m ™ of Sp ™ ± information sent out, full d ^ of the TASI information in the external stand, and to provide a memory for storing Si information that has already been ^ Lmdt is and the sending of the now from-SdLiprSrinfonnation controls, i.e. the TASI- ^ f! ™ 2ί in the operating state. As a result, they are necessary

di ^^ drKS ^ Speichg because dead memory for TASI information in the

Contents of the memory the status of the allocation that

So two signal wires have been previously determined, and only the part in which the assignment has been changed is rewritten, and therefore the content is of course _appropriated as the initial state ^ n for this reason

SS the first frame of D ^ T the operation of duplicating the contents of a memory in which the rewriting has already ended and the ^ SGTST ^ start ^ jd has been switched. By finishing this operation, it may Hch to maintain the priority of the channel which a TASI-channel has been allocated once been When the memory mD-ST driven again Bt is the Schweüwert for the change from the idle state m talking state higher than the Sword value for the change from the language stand in the idle state, outside of the threshold values, which relate to the counter value of the TeüesD. By using different threshold values for the ascent

1 947i688 3

13 14

and the garbage given will be received via input 50 as described above ben, it becomes possible to permanently change the language information exclusively from the TASI display the state around the threshold value information successively in the language avoidance, information memory 53 via the write register 52,

Next, the block diagram of FIG. 5 is written in FIG. 10, beginning with the foremost channel, ie the top receiving side, ie the speech information memory for the speech information. The TASI-53, the channel status memory 58 and the associated information are represented by the circuit 55 petered parts in the station B of FIG. 4 and 10 are the signals at the input TASI information, the speech information and that from the other 57 are interpreted by the discriminator 50. That is to say, the TASI information received at the output of the station. The * separating and combining circuit 55 in the bits JASI-Informatione3 are coded in order to indicate whether the busbars are aware of whether or not to increase. If they have been decoded JASI channels are assigned to the transmission channels, a signal as to whether or not a TASI channel is, and the discriminator 57 writes to any busbar is assigned or 15 this in the channel status memory 58 in unchanged not in the bit position accordingly in the relevant order. When TASI information is sent to the busbar, and if a TASI channel is to be shared, and if that is assigned, the number of the TASI channel can be known from the receiving side of the receiving depending on the fact that this TASI- TASI information controls, this leads to the fact that the channel is put into operation according to the sequence of the collective ao reception with incomplete TASI information rail to which the TASI is controlled and that a mix-up is assigned in the channel. The signal at output 51 indicates communication network is effected. Therefore, the PCM signals of the received TASI channels, transmitting side all TASI-LJormationen, which are used for the in the order of the busbars 27-1, control of the reception, from-27-2 ... 27- / M of station B according to the send 25 before these are used for the reception control merged rails 17-1, 17-2 ... 17-m. For this reason the TASI are set and that, when there is no conversation, information sent out by this is the PCM signals are added to the PCM demodulation before the speech information for device 60 for transmission the busbar determines the control of the voice information of the signal of station B corresponding to the busbar of the 30 frames which will be sent next. Station A to which no TASI channel is assigned, if the transmission of the TASI control signals is assigned. At the input 59 the synchronization-specific train is finished, the next signals are sent from the PCM transmission line and form the time TASI control signals. Therefore, in order to keep the setting control signal for the reception of the TASI information permanently at the receiving end and that is available on the TASI channels, it is necessary to provide two memories, that is to say the voice information and a memory for the time setting Storing the PCM signals used to control the application of the switched received speech information to the PCM demodulation circuit TASI information, ie the TASI information synchronously with the PCM transmission circuit. 53 denotes in the operating state, and a memory for net the speech information memory for storing 40 storing the TASI information used for controlling the next signal of the speech information in a frame and from frames, ie the addresses, the number of which is equal to the number of TASI- TASI- Information in the receiving state. That is why channels is. Writing to this memory is carried out by memories E and F, each of which carries out one bit via write buffer memory 52, and reading of each busbar in the channel is carried out via read buffer memory 54, as shown in FIG. 55 denotes a separation and compilation shows two functions SGRST - the memory circuit with a decoder circuit for storing the TASI information in the receipt of the TASI information from the to the initial state - and SP-ST - the memory Signal train sent to the station and to determine from storing the TASI information in the operation of the error correction code whether or not an error is present in the received TASI information alternately under the control of the TASI information, criminator 57 off and switching between these and extracting the TASI information from functions will be fully synchronized with those of which the error correction code has been removed. Switching the transmission memory carried out. The 57 means a discriminator with a counter, memory E, which in the state SGR-ST in a beum in each frame the number of signals, the 55 correct signal frames, z. B. form a signal frame in a signal frame to count. This discriminator is used to monitor whether the synchronization signal of the SP-ST is in the next signal frame. TASI control signal always at a certain level.While therefore TASI information is received in the constant value of the counter and memory is written in the SGR-ST state, this signal adapts to the synchronization received, the other memory controls the reading of the voice signal, when synchronism is set. Information memory 53 through transition to SP-ST. This discriminator 57 not only ensures whether or not a TASI channel is assigned to a busbar by the separation and assembly, but with a bit in the circuit 55, the TASI information received in the address is exclusively in accordance with this group -Channel status memory 58, but also changes, 65 rail displayed, and only in the case of the busbar, as described below, the functions of the memory E to which a TASI channel is assigned, +1 is the In- and F of the channel status memory 58. Hold of the address register 56 added what

When voice information and TASI information are recorded in the content of the voice information memory 53

successively read out and sent to the PCM decoding device 60 via the read buffer 54 will. Reading out of the voice information memory 53 does not take place to the busbar for that there is no read signal, and instead a PCM signal pattern becomes during the disconnection of a not shown in the drawing

th circuit sent out. As described above, according to the invention, the functions of memories B, C, E and F are periodically exchanged, and one bit is provided in the memory of TASI information at each bus bar, and therefore a TASI controller is inexpensive with very simple ones Save can be executed.

For this purpose 3 sheets of drawings

Claims (6)

-. Patent claims: 1. Control arrangement for a TASI system, comprising a transmitting device with a. Discriminator for determining the speech status of each busbar connected to a subscriber by determining whether the voice information sent out by each busbar exceeds a predetermined level or not, and for assigning a free TAST channel to this busbar, with a channel status memory for storing the TASI informatiote i , which represent the corresponding relationship between the busbars and the TASI channels and have been determined by the discriminator, with a voice information memory for storing the voice information from the busbars to which TASI channels have been assigned, from the voice information in the order of the TASI Channels on the basis of TASI information stored in the channel state memory, furthermore a TASI information adding circuit for adding the TASI information stored in the channel state memory to voice information stored in the voice format memory ion and for sending this information, characterized in that three memories (A, B, C) are provided in the channel status memory (8) of the transmitting device and that these memories are cyclically used as memories for storing the TASI information which contains the voice information ( SPST) , used as a memory for storing the TASI information sent out by addition to the voice information (SGT-ST) and as a memory for storing the TASI information in the rewrite state (D-ST) (Fig . 4 and 7 to 9). 2. Control arrangement according to claim 1, characterized in that the TASI information is sent out with division into a plurality of frames (F i g. 6 [d]). 3. Control arrangement according to claim 1, characterized in that each of the three memories Has addresses corresponding to the bus bars and that each of these addresses contains a bit. 4. Control arrangement according to claim 1, characterized in that the TASI information is sent out as an information train from "1", "0" to indicate whether the TASI channels are assigned to the bit positions in accordance with the bus or not (F i g. 6 [e]). 5. Control arrangement for a TASI system according to claim 1, comprising a receiving device with a separation and compilation circuit for extracting TASI information from the signal train sent by the transmitter, with a voice information memory to store in the speech information directed to the station to which this store is directed geüüit. and with a channel state memory for storing the TASI information which is generated by the separation and assembly circuit have been pulled out to the in the To read out voice information stored in speech information corresponding to the busbars, characterized in that two memories (E, F) are provided in the channel status memory (58) of the receiving device and that these memories alternate as memories for storing the TASI information for controlling the voice information that has just been read out. xen (SP-ST) and can be used as a memory for storing the TASI information just sent out by the transmission side (SGR-ST) (Fig. 4, 10 and 11). 6. Control arrangement according to claim 5, characterized in that each of the two memories Contains addresses corresponding to the bus bars and that each of these addresses has a bit.