SU1646078A1 - Telephone communication system - Google Patents

Abstract

This invention relates to telephone communication systems. The purpose of the invention is to increase the capacity by enabling the fully accessible inclusion of an automatic telephone exchange with a limited number of external communication outputs. The telephone communication system comprises a transmission unit 1, a search and connection unit 2, M tone dialing units 3 and an automatic telephone station 4. The goal is achieved by introducing a search and connection unit 2 connected between the transmission unit 1 and the automatic telephone station 40 The automatic telephone station 4 is occupied by one of the tonal dialing units 3. The system is characterized by the implementation of unit 2 and the elements included in it 3 of the "n" f-ly, 5 ill. 9 IB

Description

The invention relates to telecommunications and can be used to automate communications over group tone frequency channels.

The aim of the invention is to increase the capacity by enabling the fully accessible inclusion of an automatic tele-station with a limited number of external communications outputs.

On league. Figure 1 shows a structural electrical circuitry of a telephone communication system; Fig. 2 is a structural electrical circuit of the search and connect unit; in fig. 3 - structural electrical circuit analyzer of signals and codes; in fig. 4 is a structural electrical circuit of the selection unit; in fig. 5 is a electrical block diagram of a connector control unit;

The telephone communication system comprises a transmission unit 1, a search and connection unit 2, M tone dialing units 3 and an automatic telephone exchange (PBX) 4.

The search and connect unit 2 (Fig. 2) contains N signal and code analyzers 5, the first and second connector control blocks 6 and 7, the first and second selector blocks 8 and 9, and the coordinate matrix connector Yue

The analyzer 5 of signals and codes (Fig. 3) contains a receiver 11 of a dial tone, a block 12 for allocating the station code, a selector 13 for the busy and outgoing pulses, and the element OR 14.

The first and second blocks 8 and 9 of choice (Lig, 4) contain the first and second elements OR 15 and 16, the counter-distributor 17, the output triggers 18 and the trigger 19.

The first and second blocks 6 and 7 of the connector control (figs 5) contain circuits consisting of the element OR 20 and the one-shot 211

The telephone communication system operates as follows.

When an outgoing intermediate station connection is established, the output index for the automatically switched separation network (OAKTS) is dialed, and one of the M blocks 3 is selected and occupied by the ATC 4 devices. At the same time, the outgoing occupancy control signal

0

five

d

0

five

0

five

supplied to one of the M inputs of the block 2, where it enters the corresponding inputs of the second block 7 and the second block 9, the latter searches for one of the N channels from the number unoccupied at the time of the connection and sends a control signal to the input of the first block 6C As a result, the input of the horizontal control of the coordinate matrix connector 10, determined by the number of the occupied block 3, and the input of the vertical control of the coordinate matrix connector 10, determined as a result of the search, receive pulse controls ignaly providing corresponding trigger switching point. Coordinate matrix connector 10 provides four-wire switching of channel and station inputs and outputs of block 2, while broadcasting a busy tone channel formed by block 3 to the channel. The busy signal is transmitted to the corresponding inputs of blocks 2 of other intermediate channels on the selected channel. stations, where it arrives at the inputs of the corresponding analyzers 5. In the latter, the incoming call is recorded and this channel is marked busy.

The caller dials the three-digit code of the intermediate station received by all analyzers 5 connected to this channel at all intermediate stations. In blocks 12 included in analyzers 5, the received code is compared one by one with the assigned station and recorded in the fixed memory Blocks 12 In case of coincidence, the control signal of the incoming occupation is applied to the corresponding inputs of the first block 6 and the first block 8 0 The last one searches and occupies one of the blocks 3 from among the unused the time of establishing a connection and exchange coupled term devices 4 corresponding intermediate station "hearing dial tone, the subscriber dials the desired number, then the compound is carried out in the prescribed order.

When one of the subscribers is selected, the tone pulse signal is released from block 3 through the channel to the inputs of all connected

to the channel of analyzers 5, where the circuit of blocks 2 is allocated and at the end returns to the initial position (for the given channel) "With the same signal the corresponding block 3 returns to the initial state.

The analyzer 5 signals and codes works as follows

The linear and control tone pulse signals transmitted through the group channel of the tone frequency are fed to the input of the receiver 11, where they are converted into logical pulse signals. Logical pulse signal Occupation enters the input of the dividers 13, where it is allocated and fixed. From the moment the signal arrives, Occupation at the information output of the analyzer 5 is signaled, with which the given channel is marked busy. At the end of the reception of a signal, the occupancy from the output of the selector 13, a control signal is received, allowing recording in code 12 of a code combination with information about the number of the called intermediate station. In case of coincidence of the received code with the recorded in the permanent memory, unit 12 generates a control signal at the output. If there is a mismatch, the blocking signal at the information output is saved until the channel is released. The information output of the analyzer 5 is the output of the element OR 14.

The selection unit works as follows.

When a request is sent to one of the control inputs of a logic signal to search for an empty group channel of a tone frequency (set) from the output of the first element OR 15, a pulse signal is sent to the input of the trigger 19. The flip-flop 19 is switched and a logical signal is sent to the enable input of the counter-distributor 17, enabling it to operate on a clock input. When switching the distributor counter 17, a logical signal appears at the corresponding output, arriving at the clock input of the output trigger 18. If there is a resolving potential at the information input of the output trigger 18, which corresponds to an unallocated channel (set) state, then it switches its output is a logical signal through wto

ten

15

20

25

thirty

five

0

five

0

five

The swarm element OR 16 is fed to the reset input of the trigger 19. The latter returns to its original position and stops the operation of the distributor counter 1 7.

The connector control unit operates as follows.

When a logical signal arrives at one of its inputs, a logical signal is triggered at the output of the corresponding element OR 20 that triggers the one-shot 21, which generates a pulse logical CHI-output to control the coordinate matrix connector 10. At the same time, if the unit is used to control the horizontal connector the output of the element OR 20 is supplied to the corresponding information input of the first block 8 of choice.

Claims (4)

Invention Formula one . A telephone communication system comprising a transmission unit and an automatic telephone exchange, to which the M voice-frequency dialing blocks are connected to the talk and service pins, characterized in that in order to increase the capacity by enabling the fully accessible automatic telephone exchange with a limited number of outputs from the external telephone zi, a search and connection unit is introduced, the station inputs and outputs of which are connected to the inputs and outputs of the corresponding M tone dialing blocks, the service inputs of which x are combined with the M inputs of the search and connection unit, the N channel inputs / outputs of which are connected to the N inputs and outputs of the transmission unit, and the search and connection unit contains N signal analyzers and codes whose inputs are combined with the first inputs of the coordinate matrix connector, the channel inputs of the search and connect unit, whose N channel outputs are the N first outputs of the coordinate matrix connector, the M second inputs and outputs of which are the station inputs and outputs of the block search and connect, with the first outputs of N signal analyzers and codes connected to the N control inputs of the first selection block and to the N first the inputs of the first connector control unit, whose N outputs are connected to the vertical control inputs of the coordinate matrix connector, the horizontal control inputs M of which are connected to the M outputs of the second connector control unit, the M first inputs of which are combined with the M control inputs of the second block These choices are the inputs of the search and connection unit, the other outputs of the signal analyzers and codes are connected to the N information inputs of the second selection block, whose N outputs are connected to the N second inputs The first connector control block M's outputs of the first selection block are connected to the M second inputs of the second connector control block, whose information outputs are connected to the M information inputs of the first selection block. 2. The system of claim 1, wherein the signal and code analyzer comprises a tonal call receiver connected in series, a busy and disconnect pulse extractor and a station code extraction unit, as well as an OR element whose first input is connected to the output of the tonal call receiver and the second inputs of the station code allocation unit, the first input of which is combined with the second input of the OR element, the output of which is the second output of the signal and code analyzer, the first output of which is the output of the station code allocation unit, and The dial tone receiver is the input of the signal and code analyzer. 3. System for and. 1, characterized in that the first and second selection blocks contain the first and second OR elements, the outputs of which are connected to the setup inputs of the trigger, the output of which is connected to the enable input of the distribution counter, the outputs of which through the output triggers are connected to the inputs of the second element OR, and The outputs of the selection block, whose information inputs are the information inputs of the output triggers, and the control inputs of the selection block are the inputs of the first OR element. 4. The system of claim 1, wherein the first and second connector control units comprise circuits of an OR element and a one-shot one connected in series, the first and second inputs of the OR elements of all the circuits being the first and second the inputs of the connector control unit, the outputs of which are the outputs of the one-vibrators, the inputs of which are connected to the information outputs of the connector control unit. Canoglia CmaruiiOHMut entrance eleven 13 and Inputs 15 five m R Vim} sixteen 12 Code information bb / hoa Fig-j eleven d / moves 18 THEM smm § WITH uh nineteen inf. 8 way 1 . inf. bkhol /) Ai 20 AV (AM) B1 20 & M (5MG FIG. five 21 W / moves / 21 Schm) Information Outputs (1) (m)