SU649167A1 - Switching apparatus for conference communication - Google Patents

Description

The invention relates to automatic telecommunications and is used in a switching system of de; 1 modulated signals for organizing a conference with digital information processing.

A switching device for conferencing is known, comprising a reception bus, a transmission bridge, a time switch of channels, a distributor, an information transmission resolution block and a channel occupancy signal generation unit, and the first output of the distributor is connected to the first input of a temporary channel switch whose output is connected to the receive bus , the outputs of the information transmission resolution block are connected to the first inputs of the block forming signals for occupying channels, the first outputs of which are connected to the corresponding volt rymi entry time switch channels 1.

However, the accuracy of switching in such a device is insufficient.

The purpose of the invention is to improve the accuracy of switching.

To do this, a switching device for a conference, containing a receive bus, a transmission bus, a time switch

channels, distribution.shte.pj, oyuk of resolution and wiring 4) () rmats1111 and signal conditioning formation block for channel occupancy, the first output of the distributor is connected to the first input of the temporary channel switch, iU) its input is connected to the receive bus, the outputs of the module The information transmission section 1 is connected to the first inputs of a busy channel forming unit, the first outputs of which are connected to the corresponding second inputs of the intermittent channel switch, a channel analyzer, a barring switch and a counter are entered, nepBi) i. The inputs of the channel analyzer are connected to the pip transmission, the second inputs of the channel analyzer are connected to the corresponding outputs of the distributor, the third inputs of the temporary channel switch are connected to the corresponding first outputs of the analyzer Kana, 1ow, the second outputs are connected to the first inputs of the information transmission permission block. , the second inputs of which are connected to the corresponding outputs of the switch signals of the prohibition, the inputs of which are.-connected to the corresponding second outputs of the block The channel occupancy signals, the third output of which is connected to the auxiliary input of the barring switch, the outputs of the transmission resolution block are connected to the corresponding first inputs of the counter, the second input of which is connected to the second output of the distributor, and the output of the counter is connected to the additional input of the signal generation unit channel occupancy.

The drawing shows a structural electrical circuit of the proposed switching device.

The switching device for conferencing includes a reception bus 1, a transmission bus 2, a time switch for 3 channels, a distributor 4, a communication passage resolution unit 5 and a channel occupancy signal processing unit 6, the first output of the distributor 4 being connected to the first input of the time switch 3 channels, the output of which is connected to the reception bus 1, the outputs of the information transmission permission unit 5 are connected to the first inputs of the channel occupancy signal generating unit 6, the first outputs of which are connected to the corresponding second 3 inputs of the temporary switch, 7 channels analyzer, 8 prohibition signals switch 8 and counter 9, the first inputs of the analyzer 7 channels are connected to bus 2 of the transfer, the second inputs of the analyzer 7 channels are connected to the corresponding outputs of the distributor 4, the third inputs of the temporary switch 3 channels are connected with the corresponding first outputs of the analyzer 7 channels, the second outputs of which are connected to the corresponding first inputs of the passage resolution unit 5, information, the second inputs of which are connected to the corresponding outputs of the switch 8 of the inhibit signals, the inputs of which are connected to the corresponding second outputs of the signal conditioning block 6, the third output of which is connected to the auxiliary input of the switch 8 of the inhibit signals, while the outputs of the information transmission resolution block 5 are connected to the corresponding first inputs of the counter 9, the second input of which is connected to the second output of the distributor 4, and the output of the counter 9 is connected to the auxiliary input of the block 6 for forming the channel occupancy signals, and in The 3-channel switchboard contains the logical element 10 OR and the logical elements II, 12 and 13 AND, the analyzer 7 channels - the trescd shift register bf 14, 15 and 16 and the logical elements 17, 18, 19 2I-OR, block 5 allowing the passage of information - logic elements 20, 21, 22 I, block 6 of forming signals for occupying channels -.RS triggers 23, 24, 25 and logic element 26 OR,

and the switch 8 signals of the prohibition - the logical elements 27, 28, 29I.

The described device operates as follows.

.Under clocking signals

the distributor 4, the information of each subscriber present on the transmission bus 2 is recorded in its corresponding three-bit shift register 14, 15, 16 and each clock signal is sequentially shifted one bit forward. Thus, the information located in the third bit of the three-bit register is shifted in time by two periods of the clock signals of the corresponding 1. time channels in relation to the information of the transmission area 2. The presence of three of the same type of characters (zero or single) in all bits of the shift register, for example, register 14, entails the appearance of a single signal at the output of the logic element 17

0 2I-OR analyzer 7 channels, which, acting on the logic element 20 AND of the information transmission resolution block, causes the appearance of a single signal at its output, since a single signal from the output of the logic element 27 AND switch 8 is applied to the second input of the logic element 20 AND ban signals. This single signal is fed to the first input of the counter 9, continuously counting under the influence of clock pulses, and sets

0 it is in the zero (initial) position. At the same time, this single signal, acting on the S input of the trigger 23 of the block 6 of forming the channel occupancy signals, switches it to the single state, which entails the appearance of a zero signal at its inverse output. The zero signal at the inverse of the output of the trigger 23 holds a single signal at the output of the logic element 27 And and the switch 8 signals of the prohibition. A single signal at the direct output of the R-S flip-flop 23 through the logic element 26 OR is fed to the remaining logic elements 28, 29 AND, and, since on their second inputs from the inverse outputs of the corresponding triggers 24, 25 there are single signals, causing them on their outputs

 the appearance of a zero signal. These zero signals, arriving respectively at the inputs of logic elements 12, 13 and the 3 channel time switch, exclude the possibility of a single signal appearing on them

Q outs. A single signal from the direct output RS of the trigger 23 is fed to the second input of logic element II, the first input of which receives a set of temporary channel single signals from the first output of the distributor 4. To the second inputs of the logic elements 12, 13 And from the first direct outputs of the corresponding RS the triggers 24, 25 receive zero signals and therefore do not occur according to the data of the time switching circuits. Availability on