RU175560U1 - Optical extension of joints of digital transmission channels (E1, E2, E3, Ethernet) of the primary network - Google Patents

Abstract

The utility model relates to the field of wired communications for the construction of trunk, zone and local communication lines. An optical extension cable consists of a series-connected electric communication cable and an optical communication cable, at the ends of which optoelectronic converters are fixed. The optoelectronic converter comprises a series-connected input unit, an auto-detection unit, an encoding unit, a transceiver module, a decoding unit, a structure former and an output unit. The technical result is the reduction of impulse noise from lightning discharges and electronic devices. 2 ill.

Description

The technical field to which the utility model relates.

The utility model relates to the field of wired communications for the construction of trunk, zone and local communication lines.

State of the art

The electric communication line, consisting of an electric communication cable terminated on both sides by electrical connectors, transfers data from the E1, E2, E3 and Ethernet interface interfaces from the terminal equipment to the user multiplexer equipment. The length of the connecting cable between the terminal equipment and the user multiplexer equipment is limited by the attenuation of the signal, which is higher, the higher the speed of the transmitted signal. At a speed of 2 Mbps (E1), the permissible cable length does not exceed 750 m, and at a speed of 1000 Mbps (Ethernet) the permissible cable length does not exceed 25 m.

Known optical extension cable with connectors (http://www.1-cable.ru/cat/499#1120), which allows you to extend the communication line up to 1000 m

The disadvantage of this device is the inability to transmit signals of a heterogeneous nature in one cable.

Known cable insert [patent RU No. 7555, 08/16/1998], which contains a piece of cable with interface devices at its ends, n optoelectronic converters containing transmitting and receiving parts, where n is the number of organized paths, through a fiber optic cable. The transmitting part consists of a series-connected remote power filter, frequency response corrector and a transmitting optical module. The receiving part consists of a series-connected receiving optical module, an amplifier, a frequency response corrector and a remote power filter, as well as a converter operation control device.

The disadvantage of this design is the limitation of the increase in the length of the connecting cable used to transmit only analog signals.

Utility Model Essence

The technical task of the proposed solution is to create an optical extension cable that allows you to increase the length of the connecting cable between the terminal and multiplexer equipment.

The technical result of the proposed solution is to reduce impulse noise from lightning discharges and electronic devices.

The technical result is achieved by the fact that in the optical extender of the joints of the digital transmission channels of the primary network containing the optical cable, the ends of which are connected to the optoelectronic converters, according to the proposed solution, electric cables are connected to the input of the first optoelectronic converter and to the output of the second optoelectronic converter, while the optoelectronic converter includes input unit, the output of which is connected to the auto-detect unit, the first and second outputs of which are connected to Okami encoding and decoding, the coding unit output is connected to the input of the optical transceiver module, the output of which is connected to the input of the decoding unit, the output of which is connected to the input of the structure whose output is connected to the input of the output unit.

Brief Description of the Drawings

In FIG. 1 is a structural diagram of a device; FIG. 2 shows a block diagram of an optical converter.

Utility Model Implementation

The optical extension cable consists of a series-connected electric communication cable 1 and an optical communication cable 2, at the ends of which optoelectronic converters 3 are fixed. The optical converter 3 comprises a series-connected input unit 4, an autodetection unit 5, an encoding unit 6, a transceiver module 7, a unit decoding 8, the shaper structure 9 and the output unit 10.

Communication electric cables 1 transmit electrical signals E1, E2, E3 and Ethernet from the terminal equipment to the optoelectronic converters 3. An electrical signal is received at the input device 4 of the optoelectronic converter 3, where it is converted into a binary sequence of pulses suitable for further processing. The converted signal is fed to the autodetection unit 5, which detects the frequency, structure and type of the input sequence and sets the corresponding mode of operation of the encoder 6. Encoder 6 digitally processes the input signal and encodes into a form convenient for modulating an optical signal. The transceiver optical module 7 converts the input sequence into an optical signal. From the transceiver optical module 7, the optical signal is supplied to the optical communication cable 2, from which the signal is fed to the second optical converter 3, which performs the inverse conversion of the signal from optical to electrical.

The transmission of electrical signals through an optical cable eliminates interference from impulse noise from lightning discharges and interference from other electronic devices. The proposed solution allows to improve the quality of transmission and transfer payloads up to 1000 Mbit over a distance of up to 20,000 meters.

Claims (1)

An optical extender of the joints of the digital transmission channels of the primary network, containing an optical cable, the ends of which are connected to optoelectronic converters, characterized in that electrical cables are connected to the input of the first optoelectronic converter and to the output of the second optoelectronic converter, while the optoelectronic converter includes an input unit, the output of which is connected with an autodetection block, the first and second outputs of which are connected to the coding and decoding blocks, the output of the coding block The unit is connected to the input of the transceiver optical module, the output of which is connected to the input of the decoding unit, the output of which is connected to the input of the structure former, the output of which is connected to the input of the output unit.

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