SU543170A1 - Tone Frequency Channel Reservation Device - Google Patents

Description

The invention relates to communication systems. A device for reserving channels of the tonal frequency is known, comprising a switching unit at the leading end, to which respective inputs are connected a receiver and a transmitter of commands, a control unit and control units, the second outputs of the transmitter and receiver of commands, as well as control units are connected to the inputs of the control unit, and at the slave end there is a switching unit, the output of the control unit is connected to the input of the latter, to the inputs of which the corresponding outputs of the control units are connected. However, in the known device, commands are exchanged between cooperating stations for connecting backup channels to information transmission equipment using individual transmitters and command receivers assigned to each subscriber, which significantly increases the amount of individual equipment. In order to simplify the individual equipment in the proposed device, at the slave end, the receiving outputs of the switching unit are connected via serially connected receiving power distributor, amplifier, transformer, transit extension cable and transmit power distributor connected to the transmission inputs of the switching unit, the second output of the transformer being connected through the second extension cable and receiver teams connected to the remainder of the input unit manager. In the drawing, a functional diagram of the proposed device is adopted. A tone frequency channel reservation device consists of sets of master and slave stations 1 and 2 connected by channels 3 (71 channels in total). The host station 1 contains a switching unit 4, the transmitter 5 of the commands is connected to the corresponding input, the receiver 6 is connected to the output, the output of the control block 7 is connected to the control input, another output of this block is connected to the transmitter 5 comaids, and the inputs are connected to the receiver 6 teams and blocks 8 and 9 control. The corresponding inputs and outputs of the switching unit 3 are connected to the units 10 of the information transmission equipment (API), and part of the blocks 10 have built-in control circuits, for example blocks 10-1 and 10-2, their control outputs are connected to the inputs of the control unit 7, the other part of the blocks 10, for example, blocks 10- (p-1), 10-p has no control costs and is connected to control unit 7 through blocks 8 and 9 of control. The slave station kit 2 contains a switching unit 11, the receiving outputs of which

through serially connected distributor 12 receiving power, amplifier 13, transformer 14, transit extension 15 and distributor 16 transmit power are connected to the transmission inputs of switching unit 11. The second output of transformer 14 is connected through serially connected second extension 17 and receiver 18 comaids connected to auxiliary input of block 19 control, the output of which is connected to the switching unit 11, and the inputs through the blocks 20 and 21 of the control are directly connected to the blocks 22 of the information transmission equipment (IPA) (all pn blocks), but blocks 21-1, 22-2 have built-in control circuits, while blocks 22- (ha-1) and 22- / 1 do not have these cues.

The device works as follows.

Let us consider the case when the signals of a malfunction of any channel 3 are recorded only at one station (one-sided rejection). The malfunction signals of channels 3-1 and 3-2 are produced by the internal circuits of the operability control of blocks API 10-1.10-2, 22-1 and 22-2, and channels 3 - ("- 1) and 3-n - by blocks control 8, 9, 20 and 21.

Assume that the failure of channel 3-1 is registered at slave station 2 by the channel performance monitoring circuit of block 22-1, and the corresponding signal is transmitted by it to block 19 of the control. On command of the control unit 19 in the switching unit of the unit 11, the channels 3-1 are switched from the block 22-1 to the distributors 12 and 16, and the information transmission path in the direction from the block 22-1 of the slave station 2 to the unit API 10-1 of the leading station is broken. 1, as a result of which the channel performance monitoring circuit of unit 10-1 registers the channel 3-1 imbalance and outputs the appropriate rejection signal to control unit 7.

Unit 7, in accordance with the established order of reservation of channels 3, sends to the switching unit 4 a command for switching the lower-priority subscriber and black channel of the subscriber (for example, channel 3- (p-I) from block 10- (fi-1) of information transmission equipment to the transmitter 5 commands and 6 Comaid receivers, and the transmission path from the 10- (ha-1) block of the leading station 1 is broken in the direction of the 22- (p-1) block of the slave station 2, resulting in the block 21 of the slave station 2 giving a signal of rejection of dripping 3 - (ha-1) in block 19 uiravleii, which, in turn, is issued I go to the switching unit 11 to connect the channel 3- (p-1) to the distributors 12 and 16.

At this time, block 7 sends the slave station 2 via the transmitter 5 of the comaid na 3 k (1-1) terminal to the IPU 22-1.

After connecting kaiala 3 - (/ g-1) and slave station 2 to distributors 12 and 16

This command comes from the reception path kapal 3- (p-1) into its transmission path through the series-connected reception power distributor 12, amplifier 13, distribution transformer 14, transit extender 15 and distributor 16 and transmit power. At the same time, this command through the second output of the distribution transformer 14, the extension cable 17 and the receiver 18 of the commada enters the control unit 19, the latter issues a command to the switching unit 11 to connect the channel 3- (-1) to the block 22-1. At the master station 1, from the reception path, a 3- (l-1) kapala command and its connection to block 22-1 are received at the command receiver 6, and then at control block 7. The termination of the receipt of this command after its execution at slave station 2 is a cavitation signal, after which the control unit 7 issues to the switching unit 4 a command switching channel 3 (p-1) from the receiver

6 and transmitter 5 to block 10-1 of the master station 1. The reservation process is being boiled up.

If the failure of channel 3-1 is registered at the master station and the rejection message is sent from block 10-1 to control block 7, then the block

7 immediately issues a command to the switching unit 4 to switch kaiala 3- (p-1) from

unit 10 - (/ g-1) to the transmitter 5 and the receiver 6 commands.

In this way, any unit of information transmission equipment 10 or unit 22 and

any (of p) correct kapal 3.

Claims (1)

Invention Formula A tone frequency channel reservation device comprising at the leading end switching unit, to the corresponding inputs of which the receiver and transmitter of commands, the control unit and control units are connected, with the second outputs of the transmitter and receiver of commands, as well as blocks Coptrol is connected to the inputs of the control unit, and the driven slave is a switching unit, and the output of the control unit is connected to the input, to the inputs of which the corresponding outputs of the co-trol unit are connected, in order to provide individual equipment and the driven end outputs receiving a switching unit through a serially connected receive power distributor, amplifier, transformer, transit extension cable and transmit power distributor connected to the transmission inputs of the switching unit, n The second output of the transformer is connected through the serially connected second extension cord and the command receiver is connected to the auxiliary input of the control unit.