The optical transceiver is the terminal device for optical signal transmission. Due to the improvement of the current technology, the reduction of the price of optical fiber has made it a good application in various fields (mainly in security monitoring), so the manufacturers of optical transceivers are like mushrooming. However, most of the manufacturers here are not fully mature. The development of new technologies requires cost, manpower and material resources. This has resulted in manufacturers being mostly small and medium-sized enterprises, and various brands have emerged. However, the quality is still similar. Foreign optical transceivers are good but expensive. Therefore, domestic manufacturers have transformed the production of optical transceivers to meet domestic needs.
The optical transceiver is the terminal device for optical signal transmission. Due to the improvement of the current technology, the reduction of the price of optical fiber has made it a good application in various fields, so the manufacturers of optical transceivers have been mushrooming. However, most of the manufacturers here are not fully mature. The development of new technologies requires cost, manpower and material resources. This has resulted in manufacturers being mostly small and medium-sized enterprises, and various brands have emerged. However, the quality is still similar. Foreign optical transceivers are good but expensive. Therefore, domestic manufacturers have transformed the production of optical transceivers to meet domestic needs.
SDH (Synchronous Digital Hierarchy), which is defined according to the ITU-T recommendation, provides a corresponding level of information structure for the transmission of digital signals of different speeds, including a multiplexing method and a mapping method, and a related synchronization method. Technical system.
The optical transceiver is the terminal device for optical signal transmission. The optical transceivers should be classified into video optical transceivers, audio optical transceivers, data optical transceivers, and Ethernet optical transceivers in three categories: PDH, SPDH, and SDH.
PDH (Plesiochronous Digital Hierarchy) optical transceiver is a small-capacity optical transceiver, generally a pair of applications, also called point-to-point applications, the capacity is generally 4E1, 8E1, 16E1. The SDH (Synchronous Digital Hierarchy) optical transceiver has a large capacity, generally 16E1 to 4032E1.
SPDH (Synchronous Plesiochronous Digital Hierarchy) optical transceiver, between PDH and SDH. SPDH is a PDH transmission system with SDH (Synchronous Digital Series) features (based on the principle of code rate adjustment based on PDH, and at the same time adopts some networking technologies in SDH).
In terms of monitoring terminology, it is a video optical transceiver that transmits video and other data, audio, switching, and Ethernet telephone signals. The essence of this is: photoelectric conversion transmission equipment; placed at both ends of the cable, One receipt and one shot, as the name suggests, the optical transceiver; in a broad sense, the photoelectric conversion equipment based on the optical network for transmitting signals can be called optical transceiver.
The role of optical transceiverThe optical transceiver is a fiber-optic communication device that extends data transmission. The optical transceivers are generally used in pairs, and are divided into an optical transmitter and an optical receiver. The optical transmitter performs electro-optical conversion and transmits the optical signal for optical fiber transmission; the optical receiver mainly restores the optical signal received from the optical fiber to an electrical signal. , complete photoelectric conversion. What is the role of the optical transceiver? The following is a small series to introduce the role of the optical transceiver.
The role of optical transceiver - PDH optical transceiver
PDH (Plesiochronous Digital Hierarchy, quasi-synchronous digital series) optical transceiver is a 120-channel photoelectric integrated transmission device composed of ultra-large-scale integrated circuits, generally used in pairs, also called point-to-point applications, the capacity is generally 4E1, 8E1, 16E1; Small-capacity switch networking, user loop network, mobile communication (base station), private network, DDN network, etc. Its main features are: the use of ultra-large-scale integrated chips, with low power consumption and high reliability. Provides the remote loopback test function of E1 for easy maintenance. The 120 provides four E1 channels; it has a complete alarm function to display local and remote alarms. The alarm information (including the power failure alarm) can be reported to the peer through the network management channel. The transceiver is integrated and integrated, and the working performance is stable and reliable. The design of the whole board is small and easy to use.
The role of optical transceiver - SDH optical transceiver
SDH (Synchronous Digital Hierarchy, Synchronous Digital Series) optical transceivers have large capacity, generally 16E1 to 4032E1.
The role of optical transceiver - SPDH optical transceiver
SPDH (Synchronous Plesiochronous Digital Hierarchy) optical transceiver, between PDH and SDH. SPDH is a PDH transmission system with SDH (Synchronous Digital Series) features (based on the principle of code rate adjustment based on PDH, and at the same time adopts some networking technologies in SDH).
The role of optical transceivers - video optical transceiver
The video optical transceiver is a device that converts one to more analog video signals into optical signals through optical fibers through various codes. Since the video signals are converted into optical signals through analog conversion and digital conversion, Video optical transceivers are divided into analog optical transceivers and digital optical transceivers.
The role of optical transceiver - Ethernet optical transceiver
Ethernet optical transceivers, also known as fiber optic transceivers, are intelligent adaptive fast Ethernet opto-electrical converters. It can transfer data between two different network transmission media, twisted pair and optical fiber. This photoelectric converter can extend the transmission distance of the network from 2Km to 100Km (copper wire) without the help of any other converter.
The role of optical transceivers - audio optical transceiver
The audio optical transceiver is an audio device that converts the traditional audio analog signal into an optical signal, transmits it to the receiving end through the optical fiber, and converts it into an analog signal at the receiving end. The main function of Hua Tiancheng's Aifeng Intercom Optical Transceiver is to extend the audio signal.
The role of optical transceivers - data optical transceiver
The function of the data optical transceiver is to digitize the image, voice and data signals to be transmitted, and then multiplex these digital signals to convert the multi-channel low-speed digital signals into one high-speed signal and convert the signal into light. signal. At the receiving end, the optical signal is reduced to an electrical signal, and the restored high-speed signal is decomposed into the original multi-channel low-speed signals, and finally the data signals are restored to image, voice, and data signals.
The role of optical transceiver - VGA / HDMI optical transceiver
These two optical transceivers use VGA interface, HDMI interface, uncompressed digital high-definition video and high-speed digital optical fiber transmission technology. Supports video signal transmission with resolution up to 1080p, with high-definition and no delay.
The role of optical transceiver - HD-SDI optical transceiver
The HD-SDI optical transceiver is a device that converts SDI signals and optical signals to each other. The principle of the SDI optical transceiver is that the transmitting end converts the SDI signal into an optical signal after being modulated by the laser, and the receiving end re-encodes the data received by the laser diode into an SDI signal.
What is the role of the optical transceiver? The above is the introduction of the role of the optical transceiver. The function of the optical transceiver is to transmit data remotely, and to transmit audio and video over long distances, which has the advantages of long transmission distance, no delay, no interference.
main feature:
a. Multi-service access platform based on SDH technology, 155 Mbit/s rate level;
b. Support 504 & TImes; 504 VC12 non-blocking crossover, support arbitrary uplink and downlink services, with one-way, two-way, broadcast capabilities;
c. Provide a maximum of 8 full-slot STM-1 optical line interfaces;
d. Provide a maximum of 20 branches STM-1 optical branch interface;
e. Provide E1, 10/100Base-Tx, 10/100Base-Fx, V.35, V24 and other service interfaces;
f. Support peer-to-peer, chain, tree, star, ring and other networking methods;
g. Ethernet service supports GFP, VCAT, LCAS, and transmits a maximum bandwidth of 100M;
h. Provide D1~D12 optional DCC channel to support DCC transparent transmission;
i. Support the provision of network management channels through any VC12;
j. Support 3 management methods: SNMP, CONSOLE and PANEL monitoring;
k. Management functions include ITU-T recommended configuration, alarm, performance, maintenance, security and other functions;
l. Provide remote download of device software, with software dynamic upgrade capability, easy to maintain;
m. Support automatic discovery of network topology and dynamic maintenance of network management routes.
Technical Parameters:
Optical interface
Bit rate: 155.52Mbps ± 20ppm
Pattern: NRZ+ scrambling code
Transmit optical power: -3dBm ~ -8dBm;
Receive sensitivity: -33dBm ~ - 40dBm;
Optical fiber interface: double SC type / double FC type / single SC type optional;
Applicable fiber: single mode, multimode.
E1 interface
Nominal rate: 2048Kbps, tolerance ± 50ppm;
Interface pattern: HDB3;
Interface impedance: 75 ohms (unbalanced) or 120 ohms (balanced);
Digital interface electrical characteristics: in accordance with ITU-T G.703 recommendations;
Jitter transfer characteristics: in accordance with ITU-T Recommendation G.823;
Input jitter tolerance: in accordance with ITU-T Recommendation G.823;
Output jitter: in accordance with ITU-T Recommendation G.823;
Level: ±2.37V±10% or ±3.00V±10%;
The interface connector is: BNC coaxial.
Ethernet interface
Interface: 10/100Base-Tx;
Interface procedure: in line with IEEE-802.3u standard;
Interface rate: adjustable in 0.5M units, up to 100M;
Interface connector: RJ45.
V.35 interface
Compliance with ITU-T Recommendation V.35; Synchronization
Rate: n*64kb/s
RS232 interface
Interface type: V.24 asynchronous
Rate: 0–19.2Kbps
Management interface and extended serial port
Interface mode: RS-232;
Interface level: RS-232 level;
Interface connector: RJ-45;
Management port baud rate: 57600bit/s;
The maximum baud rate of the extended serial port: 19200 bit/s.
Power supply condition
DC supply voltage: -48VDC, tolerance range -36V~-72V,
Power supply ripple: ≤240mVp-p
AC power supply voltage: 220VAC ± 20%, 50HZ
Power consumption: ≤ 10W
working environment
Ambient temperature: 0 ° C ~ 45 ° C;
Relative humidity: ≤90% (at 35 °C);
Atmospheric pressure: 86~106Kpa.
Shenzhen Kaixuanye Technology Co., Ltd. , https://www.icoilne.com