SU482026A1 - Messaging Device - Google Patents

Description

(54) DEVICE FOR TRANSFERRING MESSAGES

one

The invention relates to telephony and can be used to transmit and receive linear. and control signals over a telephone channel in an automatic long-distance telecommunications network.

A device for transmitting messages, containing a control unit, is connected, respectively, to an information register and a synchronization register, the outputs of which are connected via a phase decryptor. to the output of the control unit.

However, in the known device, the linear and control signals are transmitted by currents of the tonal frequency., Which leads to a false triggering of this device from currents of conversational frequencies.

The aim of the invention is to increase the selectivity by eliminating the possibility of simulating control signals with conversational frequencies.

For this, the employment signal is simultaneously fed through the gate of the number to the modem connected to the control unit, through the I logical element OR to one of the inputs of the control unit, and through the serially connected unit for recording cohands and the information register to the inputs of the command decoder , to which another input is connected to the output of the phase decoder.

The drawing shows a structural electrical circuit of the device.

The device for transmitting messages contains a phase 1 decryptor, a synchronization combination, a control unit 3 consisting of modulo two adders, triggers and valves, modem 4, gate number 5, an OR 6 logic element, a command decipher 7, information register 8, for records of the information combination, block of recording commands 9, the receiving and issuing number U bus, input signal strings 11, 12, 13, 14, output signal stubs 15, 16, 17, the incoming lines 18 and 19 and the outgoing lines 2O and 21.

One signal input 11 is connected to the input of the valve number 5, and the remaining input signal signals 12, 13 and 14 are connected to the inputs of the OR 6 element and to the inputs of block 9 for recording commands and outputs that are connected to the inputs of the information register 8 The outputs of the information register 8 are connected to the inputs of the command decoder 7, whose outputs are connected to the output signal lines 15, 16, 17. The output of the OR element 6 is connected to the input of the control unit 3, which is connected to the modem 4. registrar 8 and sync register 2, out dny which is connected to

the inputs of the phase 1 dedigurator. The output-de ™ .. encoder of phase 1 is connected to the input of the command decoder 7 and to the input of the control unit 3. The reception and output number 10 pins are connected to the number 5 valve, which is connected to modem 4, the outputs of modem 4 are connected to the outgoing lines 20 and 21, and the inputs are connected to the lines of incoming lines 18 and 19.

The device works as follows.

After fixing the information in the equipment of an automatic long-distance telephone exchange, transmitted by the subscriber to a connection, a free outgoing channel takes place to establish a connection. For this, a signal from the automatic telephone unit of the long-distance station to the bus 12 is transmitted. From the block for recording commands 9, it transfers the code pattern of the signal Busy to the information register 8 and, via the OR element 6, activates the control block 3 to transfer.

The control unit 3 writes a synchronization register to the synchronization register 2 in synchronization and, having switched on modem 4, starts the message transmission device DI. Synchronization 2 and information 8 registers, working with control block 3, form the code sequence of the Occupation signal, which represents the sum modulo two recurrent.x sequences of coded sync sync signals and the Occupation signal. The code sequence of the occupation signal is modulated in modem 4 and sent through lines 2 and 21 into the line. After running 5 o msec, the signal from the control unit 3 stops the message transmission device and is switched to receive mode.

On the incoming side through the tires. 18 and 10, the code sequence of the signal Occupation via modem 4 enters block 3 which, together with the synchronization 2 and information 8 registers, determine its belonging to twenty-two additional characters, and then divides into recurrent synchronization and signal sequences tie.

Then control unit 3 turns off

modem 4 from line and enable process | synchrony or.

Recurrent synchronization and Occupation signals synchronously scroll in sync ™, respectively.

The lowering 2 and informational 8 registers are until the synchronization register in synchronization register 2 is synchronized. Phase decoder. 1, which are configured for this combination, generates a signal that is fed to the control unit 3 and to the decoder of the commands 7, allowing reading of the commands. The control unit 3 stops the synchronization process and switches the device for transmitting the SISCON.YI message to the receive mode.

The Occupation signal, via the reference 15, from the command decoder 7, enters the automatic intercity telephone station, which connects the equipment for registration of the number.no information, and via the control panel 13, it gives the signaling readiness for dialing. This signal is shaped like a signal.

Occupation is transmitted to the baseline. A straight line device, which, when received at this signal, via bus 16, enables the automatic melting of the telephone station, FDI, to transmit the number.

The transfer of iomer is realized. in the best way.

From an automatic international telephone station, at 11, a signal is sent that opens the first, and the first.,., B of number 5, it resolves to transmit the number via Number 10, Number: information from the automatic long-distance telephone station by digit through the valve of number 5, by entering into modem 4 and transmitted to the line.

At the entrance station through the region. 18 and 19 numbered information enters the modem 4, from where in block 3 and through the gate number 5 to the automatic long-distance telephone exchange.

Since the number pulses form a forbidden combination, the device does not react to them.

After the process of transmitting the numbering information by a signal from an automatic long-distance telephone station via bus 11, the valve of measure 5 is closed and the device is installed. to receive mode.

L e d m in t

A device for transmitting messages containing a control unit connected. from the information register and the synchronizing register, the outputs of which through 60 rez phase decoder are connected to the w.

I of the control unit differs from the fact that, in order to increase the selectivity by eliminating the possibility of imitation of control signals by currents of conversational frequencies, the Employment signal is fed simultaneously through a 5 meter gate to the modem connected to the DC control / H / tch j,

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through a logical element j OR to one of the inputs of the control unit, and through serially connected blocks for recording commands and the information register to the inputs of the command decoder, to the other input of which the output of the phase descrambler is connected ..

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