RU2039411C1 - Unified unit of automatic phone exchange station which is controlled by central processor - Google Patents

Abstract

FIELD: communications. SUBSTANCE: device has central processor unit 1, unit 2 for buffer memory and rerouting, N user units 3, standard communication lines unit 4, communication lines set 5, system information hardware processing unit 6, clock and reference frequency oscillator unit 7, hub unit 8, system signals generating unit 9, memory unit 10, address generation unit 11, unit 12 for buffer memory unit and rerouting of transit information, transit system information hardware processing unit 13, transit information interface unit 14 which is connected to transit information wire 15. Device provides possibility to receive all incoming information, select information which was sent to users of this unit and to transmit transit information EFFECT: increased functional capabilities. 1 dwg

Description

 The invention relates to communication technology using digital methods, algorithms and signals for transmitting voice information. The invention can be used as a small-sized institutional, production station, as well as individual nodes of the same type of a terminal digital telephone exchange of a distributed numbering capacity when telephoning microdistricts, suburbs, district and rural centers.

 Well-known modern automatic telephone exchanges of both small and large numbering capacities, for example, OZ 100 D (Hirsch K. Digital automatic telephone exchanges of small capacity, type OZ 100 D. "Telecommunication", N 9, 1988, p. 22-24); ATS D-70 (Japan); EWSD, SI 2000, MD 110 (Yugoslavia) (Barkun M.A. Digital automatic telephone exchanges, Minsk, 1990) carry out circuit switching of conversational paths with the provision of intra-station and inter-station information transmission with time packet switching and using pulse-code modulation (PCM) in in accordance with CCITT Recommendation G 732.

 This type of inter-office and inter-office communications allows for the simultaneous transmission of up to 30 telephone calls on one physical line. In this case, PCM information is transmitted in a duplex manner, connecting only two consumers with a bi-directional bus. Access to the IKM-30 bus of other consumers is impossible without additional operations on encoding-decoding information and the organization of additional IKM-30 buses.

 The closest technical solution is the institutional and production automatic telephone exchange (UPATS) of small capacity of the series N Z 400 D, GDR.

 The conversation path is digital; information is transmitted using the PCM method. Analog-to-digital conversion is implemented using codecs installed on each subscriber and trunk line. The operation of the PBX is controlled by microprocessors.

 However, the well-known UPATS, when used in a network of similar modules, only processes the intended information coming from the corresponding nodal (base station), but does not make it possible to select the necessary information from the total flow of all transit information on its own (without connecting to the nodal PBX).

 The purpose of the invention is the expansion of the functionality of the automatic telephone exchange module by providing the ability to receive all incoming information, select information addressed to the subscribers of the module, and broadcast transit information.

 The drawing shows a structural diagram of a unified module of an automatic telephone exchange with processor control.

 The unified module of an automatic telephone exchange with processor control contains block 1 of the central processor, block 2 of buffer random access memory (RAM) and a redirector, N blocks of 3 subscriber sets, block 4 of standard trunks, set of standard trunks 5, block 6 of hardware overhead processing , block 7 of the generator of reference and clock frequencies, block 8 of the hub, block 9 of the generator of service signals, block 10 of the memory, block 11 of the formation of addresses, block 12 of the buffer opera tive memory (RAM) and a transit forwarder information processing unit 13 transit hardware overhead and the interface unit 14 transit information, transit data bus 15.

The unified module of an automatic telephone exchange with processor control allows to provide the following types of communication:
in-house connections of subscribers;
incoming and outgoing connections of PBX subscribers through block 4 (two-wire subscriber or three-wire trunk lines 5, including in PCM-30 format) with subscribers of a city and intercity network;
incoming and outgoing connections of PBX subscribers and subscribers of similar modules through a transit information bus;
receiving and processing transit information with forwarding (if necessary) information from the transit information bus 15 connecting the same type of unified ATC modules with processor control to the standard trunk line 5 with broadcasting to the city and intercity network.

 Consider the work of a unified module of an automatic telephone exchange with processor control when establishing intra-office connections.

 The caller picks up the handset of the telephone set, which is part of one of the N corresponding blocks 3. The binary signal characterizing the position of the telephone handset from the corresponding block 3 is sent to block 6 through block 8. Block 6 selects binary by sequential analysis of N signals “POSITION POSITION AK” code of the subscriber line making the call. The binary code of the calling subscriber line is fixed in the register, which is part of block 6. Block 1, in accordance with the program for processing call signals of subscriber sets recorded in block 10, periodically polls the register of fixation of the calling subscriber lines of block 6. Having received the binary code of the calling block 3, block 1 through block 8 transmits a command to turn off the acoustic signal "STATION RESPONSE" from the output of block 9 through block 8 to the corresponding block 3 making the call.

 Submission of the signal "STATION RESPONSE" to the calling subscriber set sets the unit 6 in the mode of receiving the decimal number of the called subscriber via the internal information and service signals. The caller, after listening to the “STATION RESPONSE” signal, dials the decimal number of the retired subscriber. The beginning of dialing disables the acoustic signal “STATION RESPONSE”. The successive digits of the called number are decrypted in block 6, fixed on the corresponding register, which is part of block 6, and using the interrupt system in accordance with the algorithm of block 1 recorded in block 10, are transmitted to block 1.

 Block 1 primarily checks the called subscriber for employment. If the called subscriber is busy, then block 1 issues a “BUSY” command to block 8, by which the acoustic signal “BUSY” is connected to the calling subscriber from block 9 through block 8 to the corresponding block 3 making the call. If the called subscriber is free, then block 1 issues the “CALL SEND MONITOR” command to block 8, by which the acoustic signal “CALL SEND MONITOR” is connected to the called and calling subscribers from block 9 through block 8 to the corresponding blocks 3.

 Simultaneously with the acoustic signal "CALL SEND MONITOR", by the corresponding command of block 1, preparation is made for the receipt of voice information (switching of the conversation path) from the two corresponding blocks 3 involved in establishing communication through block 8 to block 2. In addition, block 1 transfers to block 6 preliminary command to control the signals of recording and reading of voice information in the corresponding memory cells of block 2.

 Block 2 is a digital device recording digital codes of voice and specialized service information, storing this information for a time sufficient to transmit and read information to the consumer.

 For the convenience of exchanging information with other PBX units, unit 2 has two bi-directional signal ports. The first port is connected by a bus of internal information and service specialized signals of standard trunk lines with block 8 and with block 4.

 The second port of block 2 is connected to one of the two ports of block 12.

 The temporal order of distribution of speech and service information in the bus of internal information and service signals is determined by the selected implementation algorithm and the used elemental base (TIIER, t. 75, N 10, 1987, p. 58).

 The duration of a single packet of voice information converted into a digital code is usually 125 μs, which is determined for the voice information of subscriber sets. M bytes are provided with voice and overhead information of standard trunks. The duration of one byte determines the duration of a single cycle of access to the cell of block 2.

 During the first half of the duration of one byte of information, speech signals converted into digital parallel codes via the bus of internal information and service signals from the concentrator block 8 are received through the first bi-directional port to block 2.

 Block 11 provides the supply to block 2 of a sequence of codes of recording addresses in accordance with the selected algorithm for implementing the information bus and the scan order of subscribers and standard trunks, recording permission is generated in block 6 after receiving a command from block 1 confirming that the conversation path between subscribers entering communication.

 The information is read from the cell of unit 2 during the second half of the byte duration by the read command received in the next single packet (i.e., after 125 μs) with redirection to the second subscriber participating in the two-way communication.

 Codes of voice information through block 8 are communicated to the corresponding subscriber participating in the conversation.

 At the end of the conversation, the subscribers put the handsets of the telephone sets, block 6 identifies the state of the hung up handset, and, at the command of block 1, the sound signal “OUT OF COMMUNICATION” is sent from block 9 to the subscriber who remains connected to the communication line. When the second subscriber also hangs up, block 6 and block 1 return all hardware and software to their original state.

 By the similar method described, the exchange of subscribers of the PBX module and the subscribers of the urban telephone network via standard trunk lines is carried out. In outgoing calls, service information is transmitted in selected areas of the packet from block 8 to block 4.

 Block 4 transmits and receives the corresponding service information signals (standard trunk lines status, handset status, station answer, dialing, call control, subscriber answer, hang up, busy, etc.) in accordance with the requirements for physical alarm systems lines. The service signals and messages received by block 4 are formatted in accordance with the algorithm for generating the internal information bus used in the ATC module and transmitted for recording to block 2.

 Further, information service signals are read into block 6, sequentially analyzed, and the sequence of communication path switching algorithm is sequentially implemented in the sequence: block 3 block 8 block 2 block 4 set of standard connecting lines 5 subscriber to the city network and vice versa.

 Incoming calls over standard trunks 5 are handled similarly to outgoing calls.

 Consider the operation of the PBX module when making outgoing connections to subscribers of the PBX module and subscribers of similar modules through the transit information bus 15.

 When dialing a number, block 6 and block 1 identify the number belonging to the subscribers connected to the PBX module through the transit information bus. This overhead information through block 2 is copied to the corresponding overhead area of block 12 and through block 14 goes to the transit information bus 15.

 The incoming service information from the transit information bus 15 passes through block 14 and is fixed in the selected area of the service information of block 12.

 It should be noted that in block 12 only the overhead information that relates to this PBX module is recorded. Information that is present in the transit information bus and is not related to this PBX module is ignored.

 Block 13 sequentially allocates service information and, exchanging it with block 1, provides the establishment of communication.

 After the information path is completed, two-way exchange of voice information is carried out in the following sequence: subscriber set of the PBX module block 8 block 2 block 12 block 14 and vice versa.

 The call is disconnected and the initial states are established according to the same algorithmic scheme as in the communication described above, the subscriber of the PBX module is the subscriber of the PBX module.

 Two-way communication is established in the same way from subscribers of other similar PBX modules to subscribers of this module, as well as between subscribers of other PBXs and subscribers of a city PBX connected to this PBX module through a block of standard trunk lines.

 Thus, the proposed unified module of an automatic telephone exchange with processor control provides for increasing the numbering capacity of an existing telephone network without additional cabling using modern methods of information transmission (fiber-optic communication lines, radio relay stations), which will significantly increase the informative capacity of communication channels. The use of information transit bus will significantly reduce the unit costs for each number by reducing the volume of capital construction costs when forming a distributed multidimensional station assembled from several proposed modules.

Claims (1)

 UNIFIED MODULE OF A AUTOMATIC TELEPHONE STATION WITH A PROCESSOR CONTROL, comprising a central processor unit, a buffer random access memory (RAM) unit and a forwarding unit, N blocks of subscriber sets, a standard trunk unit connected to a standard trunk set, an overhead information processing apparatus unit, and a generator generator unit reference and clock frequencies, characterized in that the serially connected signal generator unit and the concentrator block are introduced a repeater, a memory unit, an address generation unit, a back-office overhead information processing hardware and buffer RAM and a back-up information transfer unit, a back-up information interface unit connected to a back-up information bus, the internal (station) inputs of the outputs of the N blocks of subscriber sets connected to the corresponding information inputs of the outputs of the hub unit, the signal inputs of the hub unit, the buffer RAM unit, and the redirection unit and the standard soy unit extension lines are interconnected by a bus of internal information and service signals, address inputs of a concentrator block, N blocks of subscriber sets, a block of hardware processing of service information, a block of memory, a block of a central processor, a block of formation of addresses and a block of hardware processing of transit service information are interconnected by a central bus processor, moreover, the block of hardware processing of service information is connected by the corresponding inputs - outputs of service information with the buffer unit about RAM and forwarding, the clock outputs of the reference and clock frequencies of the generator unit are connected respectively to the clock inputs of the central processor unit, the memory unit and the address generation unit, the address outputs of which are connected respectively to the address inputs of the buffer RAM unit and the forwarding and buffer RAM unit and transit forwarding, the buffer RAM and redirection unit and the buffer RAM and transit redirection unit are connected by an information and service signal exchange bus, the buffer RAM and transit transit unit are connected inen through the block of the interface of transit information with the transit information bus.