Who Are We?
Hengtong Group is an international enterprise with a diverse range of expertise covering fibre optical communication, power transmission, EPC turnkey service and maintenance, as well as IoT, big data, e-commerce, new materials and new energy.
Why Choose Us
Our credentials
It applies to enterprises that carry out the design and development, manufacture, installation and servicing of medical devices or related services.
Global Operation
HENGTONG possesses 70 wholly-owned companies and holding companies, establishes industrial bases in up to 16 provinces of China and in Europe.
Good service
Providing technical support, troubleshooting, and maintenance services.
One-stop Solution
We offer a comprehensive customization solution, tailored to meet the specific needs and requirements of our clients.
Multi Tube Single Jacket Metal Tape Armored Duct Cable
Multi tube Single Jacket Metal Tape Armored Duct Cable as a whole is a loose sleeve layer stranded structure, and the cable core is armored with aluminum tape (steel tape) and extruded polyethylene sheath to provide comprehensive protection for the fiber optic cable.
FRP Strength Member Multitube Single Jacket Duct Cable
FRP Strength Member Multitube Single Jacket Duct Cable as a whole has a loose sheath structure, and the extruded polyethylene sheath outside the cable core provides comprehensive protection for the cable.
Multi Tube Double Jacket And Armored Direct Buried Cable
The overall structure of the Multi tube Double Jacket and Armored Direct Buried Cable is double sheathed loose sheathed lamination structure.
Non Metallic Double Jacket Cable
Non metallic Double Jacket Cable as a whole has a double sheath loose sheath structure, and the cable core is extruded with polyethylene inner sheath and reinforced with glass fiber yarn armor.
The capabilities of underground fiber optic cables extend far beyond high-speed internet. In the realm of telecommunications, they enable the backbone of the internet, known as the 'backhaul', connecting data centers and network nodes across continents. This backbone is critical for maintaining the global internet infrastructure, handling massive data traffic that forms the core of our digital ecosystem.
In healthcare, these cables play a pivotal role in telemedicine and remote diagnostics, allowing for real-time data transfer that is essential for patient care in remote areas. In finance, fiber optics facilitate high-frequency trading by transmitting vast amounts of financial data with minimal latency. Additionally, in the field of education, they provide the bandwidth necessary for remote learning platforms and educational resources, crucial for modern education systems.
Advantages of Underground Fiber Optic Cables
There are several advantages of using underground fiber optic cables.
Less likely to be damaged by above-ground elements
Since the cables are buried underground, they are less likely to be damaged by adverse weather conditions or wildlife. You won't have to worry about the cable being blown down in a storm or chewed by wildlife.
Out of sight
Another benefit to using underground fiber-optic cables is that they are out of sight and not an eyesore. You can place them discreetly along your curb or property line, and no one will ever know they're there.
Use less space to place them and get the connection needed
Since the cables are buried underground, you can use less space to place them and still get the connection you need. This can be a significant advantage if you live in a tight space.
How Are Underground Optical Cables Installed?
Underground fiber optic cables, also known as fiber optic cables, are an essential part of modern communication systems. They are responsible for transferring large amounts of data at high speeds over long distances. In order to install these cables underground, specialized techniques and equipment are required. In this article, we will explore the process of underground fiber optic cable installation.
Route planning
The first step is to determine the route of the fiber optic cable. This involves surveying the area to identify obstacles, such as buildings, trees or other structures, and planning a route to avoid them. Routing should be as direct as possible to minimize the required cable length.
Trenching
The second step is to dig trenches along the planned route. The trench should be deep enough to accommodate the fiber optic cable and any necessary protection, such as conduit or pipe. The trench should be wide enough to allow workers to access the fiber optic cable and perform any necessary maintenance.
Cable installation
After the trench has been dug, the fiber optic cable can be installed. This involves laying the fiber optic cable in a trench and securing it in place with cable ties or other fasteners. Optical cables should be installed with sufficient slack to allow expansion and contraction due to temperature changes.
Stitching
After the fiber optic cable is installed, it may be necessary to splice the lengths of fiber optic cable together. This is usually done using a fusion splicer, which uses heat to fuse the fiber ends together. Connectors should be protected with connector housings or other protective covers.
Test
After a fiber optic cable is installed and spliced, it should be tested to ensure it is working properly. This may involve using an optical time domain reflectometer (OTDR) to measure the length of the fiber optic cable and detect any defects or breaks in the fiber.
Backfill
Finally backfill the trench with soil or other material to protect the cable and restore the surface to its original shape. Any surface features such as sidewalks or curbs should also be restored.
It is important to note that installing underground fiber optic cables requires specialized equipment and expertise. It should only be done by professionals with proper safety equipment and training.
In conclusion, the laying of underground fiber optic cables requires specialized equipment, technology and expertise. It was a complex process involving careful planning, excavation, cable placement, splicing and testing. However, once fiber optic cables are installed and tested, they will provide a reliable and efficient means of communication for many years to come.
Underground Cable: Fiber Optics Technology Below Ground
Hidden beneath the ground lies an extensive network of underground cables that stretch for millions of miles. This intricate web of infrastructure forms the backbone of the digital age, enabling essential services like water supply, energy distribution, electricity, cable television, internet connectivity, and phone communication. This vast underground network – a complex system of pipelines, underground cables, and wires- is discreetly working just below the surface to support our everyday activities.
In fact, some estimates suggest that this subterranean web spans an astonishing distance of over 20 million miles. Source- Common Ground Alliance (CGA). This staggering number highlights the extensive network of cables that underpin the country's urban and rural areas, enabling vital services for its population. Underground cable is a type of optical fiber cable that enables lightning-fast data transmission for internet, phone calls, and streaming services.
However, our intention is not merely to define underground fiber optic cables as those laid beneath the ground. Instead, we aim to delve deeper into the comprehensive details you seek. But first, let's understand the structure of an underground cable:
Structure of an Underground Cable
An underground optical fiber cable consists of several essential components that work together to enable the transmission of digital data through light signals. Here's an overview of the typical structure of an underground optical fiber cable:
Core
The core is the central part of the cable where light signals travel. It's made of high-quality glass or plastic fibers that have excellent optical properties. The core's refractive index is higher than the cladding (outer layer), which allows light to be guided through total internal reflection.
Cladding
Surrounding the core is the cladding, which has a slightly lower refractive index than the core. This difference in refractive indices keeps the light signals within the core by reflecting them into it, minimizing signal loss.
The optical fiber is comprised of both the core and cladding. A primary coating is applied to the cladding, serving the purpose of providing cushioning during instances of micro bending. Importantly, this coating does not impact the optical waveguide properties.
Buffer Coating
The optical fibers are protected by a buffer coating, which is typically made of tough plastic material. This coating shields the delicate fibers from physical damage, moisture, and other environmental factors.
Strength Members
To add strength and durability, one or more layers of strength members are used around the buffer coating. These can be made of materials like aramid fibers (e.g., Kevlar) or fiberglass.
Water-Blocking Materials
In underground applications, it's important to prevent water from seeping into the cable. Water-blocking materials, such as water-absorbent tapes or gels, are often included to keep the cable dry.
Armor or Outer Jacket
The entire cable is covered by a rugged outer layer, often made of materials like polyethylene (PE). This outer layer provides further protection against moisture, physical stress, and other external influences.
Now let's understand the installation process of an underground cable.
Installation of an Underground Cable
With underground fiber optic cable installation costs averaging between $1 to $6 per foot, depending on the fiber count , careful preparation becomes paramount. Before delving into the process, several crucial steps demand attention:
Preparation and Planning
- Obtain necessary permits for right-of-way.
- Identify existing underground utilities like cables and pipes.
- Investigate soil conditions to determine which cable type and plowing equipment would be needed.
Cable Placement
- Identify and secure the inner duct.
- Prepare pull-through manholes and apply lubricant.
- Position pulling equipment within limits.
- Install proper guides at the pull-end manhole.
- Hand-feed cable into the manhole.
- Cable Placement Precautions (Infographic Content)
- Avoid exceeding the cable's pulling tension, bending radius, and crush load.
- Don't use detergent or petroleum-based lubricants.
- Never set a cable reel on its flange side.
Pulling
- Connect the pulling line to the cable's grip.
- Lubricate the duct for reduced tension.
- Establish communication between feed and pull manholes.
- Begin pulling at a slow speed, gradually increasing.
- Maintain a constant pull rate and avoid stops if possible.
Final Cable Handling
- Pull cable over the sheave or block if necessary.
- One should not attempt to inch the cable to its final manhole length as it could potentially cause abrupt surges in the cable's end section.
Post-installation Inspection
- Inspect the construction area above ground.
- Ensure restoration, marker installation, and proper completion of any road bores.
- Ensure the site is free from any debris or waste materials.
- Confirm all installation specifications are met.
By following these simple steps, an underground cable can be successfully installed, providing reliable connectivity for various applications. Now, it's time to know why these cables are significant in the world of network and connectivity solutions.
Our Factory
Hengtong has over 70 wholly-owned companies and holding companies (5 of which are listed on the Shanghai, Hong Kong, Shen Zhen and Indonesian stock exchanges respectively), with 12 manufacturing bases in Europe, South America, Africa, South Asia and Southeast Asia. Hengtong operates sales offices in over 40 countries and regions around the world, supplying products to over 150 countries and regions.
FAQ
Q: Why are fiber optic cables buried?
Q: How do you install underground fiber optic cable?
Q: How does fiber optic get to your house?
Q: How does underground fiber optic cable work?
Q: Do I need to rewire my house for fiber optic?
Q: How much does it cost to run fiber optic cable underground?
Q: How deep does AT&T bury fiber optic lines?
If that cable is ever cut, that means that the cable is not buried deep enough into the ground. Normally it is supposed to 3 to 6 feet underground. When we come to repair the cable, we give you what is called a "Temporary Drop" That drop can either be aerial or on the ground.
Q: How do you detect underground fiber-optic cable?
Q: Is fiber-optic cable always buried?
Q: Do you have to bury fiber-optic cable?
Q: Why is it expensive to install fiber optic cable?
Q: Can I install fiber optic cable myself?
Q: Is fiber optic cheaper than cable internet?
Q: What is the code for burying fiber optic cable?
Q: What is the maximum distance of fiber optic cable?
Although the maximum distance of fiber optic cable is affected by both attenuation and dispersion, for most applications, the maximum distance of any type of fiber optic cable is around 62.14 miles (100 kilometers).
Q: What does fiber optic cable plug into?
Q: Does fiber optic cable degrade over time?
Q: Why do you bury fiber optic cable?
Q: What are the three types of fiber optic cable?
Q: How deep are fiber optic lines buried?
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