Nowadays more than one third of the popularity have access to the internet. Large enterprises already use the high-capacity fiber-optic access networks, and small- or medium-sized businesses also want to relieve the bottleneck of the copper-based access network and benefit from the fiber-based access network. Nonetheless, costs is one of the factors that small business would take into account. In fact, the cost of large-scale fiber optic deployments depends on a wide range of factors, including redundancy and survivability need, access to the closest fiber line, labor cost, Aerial vs. Underground, and the fiber maintenance cost. The following article concludes several factors that will have great impact on the costs of building a fiber optic network.
Figure 1 shows the layout of the fiber optic network in an office building.
Every building is situated differently, has different surroundings, different neighbors, and different physical dynamics influencing access to fiber lines, how much you’d have to spend on installation will be determined according to the specifics situation. Therefore, the factors listed below can not fit every situation. And we will not present the available materials that are likely to be used in you network as each installation requires its own assessment to determine final fiber optic network.
Redundancy and Survivability Needed
In a network designed with redundancy in mind, each portion of the network is constructed as part of a ring and economical construction is possible. On the other hand, when redundancy is constructed after the fact, it requires a custom cable pathway, usually doubling (or more) the construction cost.
Recently nearly 99 percent of the network will need two redundant physical paths from the network to its location, along with an electronic infrastructure to accommodate failure of a fiber route or an electronic component, and backup power of sufficient duration. And it also need to provide a 24-hour network operations center, a fiber repair crew, intrusion detection, and backup management and recovery facilities.
If network users do not require this level of availability, the network operator should determine their actual current and future requirements, and which subset of survivability and redundancy tools are needed. Ideally, any needs for physical redundancy will be included in the initial project design.
Although the fiber equipment costs have fallen, skilled labor costs have risen. So how can operators limit those high labor costs and still deploy a quality fiber network that can handle the bandwidth needs of today’s subscribers?
Labor typically forms the majority of the cost of construction—approximately 50 to 80 percent. Therefore the quantity of fiber strands and cables, a materials cost, is typically a secondary consideration. Labor costs are highly variable. For example, poor economic conditions may lead construction companies to reduce their fees, while mobilization of contractors may increase their bid rates if there is suddenly high demand for immediate construction. In general, large-scale ventures have an advantage in managing costs, because construction companies feel comfortable offering lower rates when they expect to profit from the volume and duration of a project.
Ability to Reuse Existing Infrastructure
Reuse the existing infrastructure is not only a cost-saving solution, but an eco-friendly option for overall users. There are a number of options for using existing cable infrastructure. For example, if there is sufficient space in the existing conduit, then you can take advantage of conduit by adding new capacity to your building, which will make your installation substantially simpler and cheaper. Furthermore, whether the existing conduit already lead straight up into your building, or it is configured through twists and turns will have a major impact on the costs of its installation. That’s it, winding paths are trickier than straight cables.
Let’s solve a problem in arithmetic. The cost of a 6-count fiber cable is $2,000 per mile, while an 864-count cable is $50,000 per mile, implying a marginal cost of approximately $50 per fiber per mile. Actual costs for fiber purchase or lease, of course, reflect market costs and depend on the total availability of fiber over the route—and are thus, typically, considerably higher; however, fiber lease or purchase may be a serious consideration over routes where construction is difficult or costly and considerable fiber has already been installed.
Aerial vs. Underground
Typical construction is a mixture of aerial and underground techniques, in part because aerial construction also is more vulnerable to extreme weather, particularly in wooded areas and areas with frequent ice and high winds. And another reason is that aerial construction may be more expensive when poles are crowded or when the utility pole owner charges high rates for access. Worst-case costs can be $100,000 per mile (which usually would lead a network owner to build underground or over another route).
Underground construction also has a wide cost range. In areas where restoration is not important and long continuous runs are possible, “plowing” the fiber into the ground is an inexpensive option—approximately $70,000 per mile. For more detailed information about aerial and underground construction, please see an article entitled “Whether to Go for Aerial or Underground Deployment”.
Based on the estimated percentage of aerial and underground plant we identified in our field survey, we estimate that the difference between aerial and underground construction in Santa Cruz is more than $80,000 per mile, as shown in Table 2.
Table 2: comparison of estimated aerial and underground construction costs.
Of cause, wire management is the most important part of any installation, especially for data communication. For better cable management in server room or the data center, IT racks, fiber enclosures and patch panels should be used. To determine what type of panels you need, take into consideration the space that will be utilized for the network. If you are installing inside of a closet or other cramped quarters and need low density, wall mountable panel is the best choice because it does not take up a lot of room. If racks are already in place, or if there is enough room to install them, rack-mount tray is the best choice because it is sturdy and easy to access. Keep in mind that rack-mount tray does not protect against environmental conditions.
Figure 3 shows the required equipment for better cable management.
Open frame racks are suggested for this server room, which can provide more flexible cabling environment. The using of fiber enclosure and adapter panels should depend on the fiber count.
The Location of Your Network
The single greatest determining factor not only to how much installation costs, but also how difficult it is to accomplish. Is fiber local or close to your office building? Or do you have to cross a state highway to extend fiber into your site? The nature of the physical terrain that the fiber needs to traverse to reach your building becomes significant. If you have to cross a state highway to bring the nearest fiber to your building, overcoming that obstacle will significantly impact the overall costs. Special use areas such as historical sites can often cause a problem for bringing fiber directly to your building. If there are any of these sites nearby your location, they could potentially impact the costs of fiber installation, depending on the route fiber needs to take to your facility.
And when the fiber is brought to your building, do you have a telecommunications room with the necessary space for installation already available? If so, that will streamline your installation costs, and ensure connectivity continuity once the installation is complete. As you may be gathering, every potential wrinkle in the process of installing fiber has the potential to make it more complicated, and everything that does in fact represent a hurdle has the potential to make the final charges more costly.
Power for Fiber Technology
How easily is sufficient power for fiber accessible from your telecommunications room? If there is ample power available, or if an emergency generator can be used to insure up-time of activated service, then you will save in fees that would require the introduction of additional power capabilities.
Fiber Maintenance Costs
Fiber optic cable is resilient compared to copper cable and coaxial TV cable. The fiber itself does not corrode, and fiber cable installed over 20 years ago is still in good condition. However, fiber can be vulnerable to accidental cuts by other construction, traffic accidents, and severe weather. In other networks of this size, we have seen approximately 80 outages per 1,000 miles of plant per year.
The fiber optic redundancy from the hubs to the FDCs in the backbone network will facilitate restoring network outages while repair of the fiber optic plant is taking place. Depending on the operational and business models, you might be responsible for adds, moves, and changes associated with the network as well as standard plant maintenance. These items may include:
- Adding and/or changing patching and optical splitter configurations at hubs;
- Extending optical taps and laterals to new buildings or developments;
- Extending access to the FTTx network to other service providers;
- Relocating fiber paths due to changes such as the widening of roadways;
- Participating in the moving of utilities due to pole replacement projects;
- Tree trimming along the aerial fiber optic path.
If you are still with us, and concerns about the cost of the installing a fiber optic network, please do not feel hesitate to contact FS.COM for a free consultation. We’ll be happy to provide you with the perfect solutions that meets your specific needs, and clarifies all the above factors that contribute to the bottom line. We offer a full range of enterprise network solutions including the 10G/40G switches, optical transceivers, high-density fiber optic cables, etc.