SU849550A1

SU849550A1 - Device for signalling state of subscriber's line

Info

Publication number: SU849550A1
Application number: SU792749408A
Authority: SU
Inventors: Валентин Сергеевич Марков; Мартиньш Жанович Габалиньш; Татьяна Филипповна Пономарева
Original assignee: Рижский Ордена Ленина Государственныйэлектротехнический Завод Вэф Им. B.И.Ленина
Priority date: 1979-04-09
Filing date: 1979-04-09
Publication date: 1981-07-23

Description

(54) ОПРЕДЕЛИТЕЛЬ СОСТОЯНИЯ АБОНЕНТСКИХ(54) THE DETERMINANT OF THE CONDITION OF THE SUBSCRIBER

ЛИНИЙLine

1one

Изобретение относитс к технике телефонной св зи и может быть использовано в электронных АТС.The invention relates to a telephone communication technique and can be used in electronic PBXs.

Известен определитель состо ни абонентских линий, содержащий m линейных детекторов, первые выходы которых соединены с соответствующими абонентскими лини ми через управл емые контакты, станционную батарею, сканер, выход которого соединен с выходом управл ющего блока АТС 1.The subscriber line condition determiner is known, containing m linear detectors, the first outputs of which are connected to the corresponding subscriber lines via controlled contacts, station battery, scanner, the output of which is connected to the output of the ATC control unit 1.

Недостатками известного устройства вл нзтс незначительное число линий в одной группе, ограничиваемое параметрами линии и сопротивлением изол ции линии, так при сопротивлении изол ции линии 20 кОм суммарный ток утечки (помехи), протекающий в исходном состо нии через групповой линейный детектор, уже при 10-и лини х в группе сравним с рабочим током, идущим через замкнутый шлейф абонентской линии , а при известном выполнении линейного детектора число линий в группе возможно не более четырех. Кроме того функциональные возможности устройства ограничиваютс только опознаванием вызова, так как установление соединени каждой свободной линии со шнуровым комплектом с учетом переходных процессов не может быть настолько кратковременным, чтобы, наприAiep , опознавать импульсы набора но.мера от вызывающего абонента.The disadvantages of the known device are an insignificant number of lines in one group, limited by the line parameters and the line insulation resistance, so when the line insulation resistance is 20 kΩ, the total leakage current (interference) flowing in the initial state through the group linear detector, already at 10 and the lines in the group are comparable to the operating current through the closed loop of the subscriber line, and with a known linear detector, the number of lines in the group is no more than four possible. In addition, the functionality of the device is limited only to call identification, since the establishment of the connection of each free line with the cord set with regard to transient processes cannot be so short as to identify, for example, the dialing pulses from the caller.

Цель изобретени - увеличение числа контролируемых абонентских линий.The purpose of the invention is to increase the number of controlled subscriber lines.

Дл достижени этой цели в определитель состо ни абонентских линий, содержащий гп линейных детекторов, первые выходы которых соединены с соответствующими абонентскими лини ми через управл еto мые контакты,станционную батарею, сканер, выход которого соединен с выходом управл ющего бло а АТС, введены преобразователь посто нного напр жени и 2п регисторов , при этом вход преобразовател посто нного напр жени подключен к станционной To achieve this goal, the subscriber line condition determiner, containing linear linear detectors, the first outputs of which are connected to the corresponding subscriber lines via control contacts, station battery, scanner, output of which is connected to the control unit's output, is converted voltage and 2p registors, while the input converter DC voltage connected to the station

Claims

15 to the battery, the outputs of the DC converter are respectively connected to the inputs of the linear detectors and through resistors with the corresponding subscriber lines, the second outputs of each of the m linear detectors are connected to the inputs of the ATC control unit, the inputs of the controlled contacts are connected to the information outputs of the scanner . The drawing shows a structural electrical circuit for determining the state of the PBX subscriber lines. The determinant of the state of subscriber lines ATS contains m linear detectors 1, controlled contacts 2, made in the form of semiconductor photodiodes, controlled by light from light emitter 3, subscriber lines 4, loaded on telephone sets 5, constant voltage converter, stationary battery 7 , control unit 8 PBX scanner 9, 2p resistors 10. The device operates as follows. When exposed to clock-based code combinations of the control unit 8, the output scanning pulses coming to one of the light emitters 3, whose address corresponds to the coded address of the subscriber in the group, occur at the output of the scanner 9. The light emitter 3 excites the respective photodiodes of the two contacts 2, which open, i.e. contact 2 is closed and the line detector 1 is connected to subscriber line 4 for the duration of the pulse. Further, three states of subscriber line are possible. If the subscriber line loop is open, the voltage from the converter 6 through the resistors 10 light emitters 3 (LEDs) is locked and the information at the output of the linear detector 1 remains unchanged, i.e. corresponds to the logical "O. If the subscriber line loop is closed (the subscriber calls), then the voltage drop across the high-resistance resistors 10 is large, the light emitters 3 (LEDs) are supported, current flows through the input circuit of the linear detector 1, and a logical 1 is generated at its output to control unit 8 via a wire that is the address of a group of subscribers. . If the subscriber line is in the conversation state, then the light emitters 3 are locked by the voltage drop from the microphone supply current, and the information at the output of the linear detector 1 remains as a logical "O." Linear capacitance through resistors 10 eliminates the line transition for scanning time, and the scanning speed is practically limited only by the speed of the semiconductor elements, which allows to expand the functionality of the device, for example, to receive information about the called subscriber, not making a register connection . The economic effect of using the proposed invention consists of saving the cost of linear detectors due to the increase in the number of lines in the group, the cost of register equipment and the switched electronic interconnecting path, since it is fundamentally necessary to keep dialing pulses from the subscriber to the register . The invention determines the state of subscriber lines, containing m linear detectors, the first outputs of which are connected to the corresponding subscriber lines through controlled contacts, station battery, scanner, the output of which is connected to the output of an ATC control unit, characterized in that In order to increase the number of monitored subscriber lines, a DC / DC converter and 2P resistors are inserted, while the input of the DC / DC converter is connected to the station battery, the outputs are Atel DC voltage respectively connected to the inputs of linear detectors and through resistors with respective subscriber lines, wherein the second outputs of each of the m linear detectors are connected to inputs of the control unit PBX inputs actuated connecting contacts to information outputs of the scanner. Sources of information taken into consideration in the examination 1. FRG patent No. 2624132, cl. H 04 Q 3/24, 1978 (prototype).