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Analysis of the application of optoelectronic hybrid cable in network communication
Introduction of optoelectronic hybrid cable
Photoelectric hybrid cable (also called photoelectric composite cable, Photoelectric Composite Cable) is a new type of access method suitable for communication access network systems. , equipment power consumption, signal transmission problems, so it is very concerned by various communication operators. But so far, the corresponding national, industry and enterprise standards are not comprehensive enough for its standard specification, so it has not been widely used in the existing network.
In today's Internet of Everything, 4G/5G base stations, WiFi equipment, security equipment, traffic monitoring equipment, climate detection systems and other applications in enterprise parks are gradually increasing, and the problem of power supply for equipment needs to be solved. The optoelectronic hybrid networking solution adopts " Photoelectric composite cable + outdoor ONU + network cable jumper + terminal equipment” networking mode, the photoelectric composite cable is transmitted to the multi-functional smart pole over a long distance, and the photoelectric composite cable + outdoor ONU is configured on the multi-functional smart pole to provide a variety of terminal equipment. Signal transmission and power supply, this solution can meet the high bandwidth requirements of equipment and reduce the use of cables. It will become more and more popular in campus wiring and urban infrastructure construction.
Advantages and disadvantages of optoelectronic hybrid cables
Obvious advantages
provide high-bandwidth access,
Solve the problem of equipment power consumption in network construction (avoid repeated layout of power supply lines); because there are both optical fiber cores and power fiber cores in the photoelectric composite cable, there are many different models, and the number of optical fiber cores is generally 2-144 core, the cable voltage ranges from 48V to 110kv. In indoor applications, a photoelectric composite cable with a voltage of 48v is generally used; when providing access for outdoor remote or macro stations, a photoelectric composite cable with a voltage range of 280v to 750v is generally required.
Small outer diameter, light weight and small footprint (usually a series of problems that can only be solved with multiple cables can be replaced by a composite cable);
It has excellent bending performance and good lateral pressure resistance, and is convenient for construction.
Low customer procurement costs, low construction costs, and low network construction costs;
At the same time, it provides a variety of transmission technologies. It has high adaptability and strong expansibility with the same equipment, and the product is suitable for a wide range of applications. According to the actual use, the photoelectric composite cable can be divided into pipeline type, overhead type, direct buried type, indoor wiring type, special purpose type and other types.
General pipeline type, overhead type, direct buried type, indoor wiring type photoelectric composite cables are mainly used outdoors, which can provide power transmission and signal transmission for communication outdoor macro stations; indoor wiring type photoelectric composite cables are mainly used indoors, for communication indoors. Distribution stations provide power transmission and signal transmission.
The Disadvantages
But optoelectronic hybrid cables also have their limitations, such as:
In the current standards, the erection of optical cables is carried out in accordance with the standards of "no electricity" or "weak electricity". The optoelectronic hybrid cable may not be suitable for laying in weak electricity pipelines, and the construction specifications need to be further clarified;
The optoelectronic hybrid cable is live, and attention should be paid to the danger of electric shock for construction and maintenance;
The concept of "no copper in optical cables" does not apply to optical-electrical hybrid cables. If they are used in the same way as ordinary optical-fiber cables, the risk of optical-electrical composite optical cables being stolen may occur.
Application examples
Application field
Power supply for communication long-distance power supply system and short-distance communication system.
Example
The world's first optoelectronic hybrid cable is an optoelectronic hybrid cable developed by Japan's Sumitomo Electric Company in 1978 for submarine optoelectronic transmission.
According to the actual use, the current optoelectronic hybrid cable can be divided into pipeline type, overhead type, direct buried type, indoor wiring type, special-purpose type and other types. 110kv.
Cable construction and installation precautions
When using optical-electrical hybrid cables, the following items should be paid attention to:
- The selected optoelectronic hybrid cable must meet the corresponding standard specifications, such as: "YD/T 2159-2010 Optoelectronic Hybrid Cable for Access Network" and "QC-B-001-2013 Technical Specification for Optoelectronic Hybrid Cable for China Mobile Access Network" " and other requirements.
- When using optoelectronic hybrid cables, it should meet the design and construction specifications of power cables and communication optical cables at the same time: such as "YD 5102-2010 Communication Line Engineering Design Specifications";
- The connection in the optoelectronic hybrid cable line should be avoided as much as possible. The line within 3KM is prohibited from being connected. When connecting, a special joint box for the optoelectronic hybrid cable must be used, and waterproof treatment must be done;
- When the optoelectronic hybrid cable is terminated, a special termination device should be used;
- The optoelectronic hybrid cable lines should be routed separately as far as possible, and protected by PVC pipes;
- During the construction process, it is necessary to ensure that the outer sheath of the optoelectronic hybrid cable is intact. After the construction is completed, the optoelectronic composite cable needs to be tested for the insulation performance of the transmission wire to the ground, to the armor and the metal reinforced core;
- The lines should be regularly inspected by personnel with power maintenance qualifications and communication maintenance qualifications;
- When the fault is repaired, the power should be cut off for maintenance, and the line conductor should be grounded first, and then the maintenance operation should be carried out.
Future outlook
The application of optoelectronic technology in real life is also more and more extensive, which has a significant impact on people's production and life. However, the means of transmitting electrical energy and the means of transmitting light are different methods.
When transmitted separately, the two types of energy will not interfere. The photoelectric composite cable integrates power supply and signal transmission. It can effectively solve the problems of broadband access, equipment power consumption, and signal transmission, and at the same time, it can save space and cost, and improve transmission efficiency. It is a very ideal optical fiber access method.
