Focus On FTTH Cabling Solution

Fiber optic cable has been widely used in telecom industry for its fast transmission speed. As people’s demand for bandwidth is increasing, optical fiber cable is not only used in enterprise network, but also applied to home network deployment. And FTTH (Fiber to the home) project is a typical example. This article will focus on FTTH cabling solution.

Overview of FTTH

FTTH refers to the installation and use of fiber optic cable all the way to individual buildings such as single family units (SFUs), multidwelling units (MDUs), providing high-speed broadband service. Take FTTH project in residential area for example, usually, the broadband service provider will set a distribution point near or inside a building. And fiber optic cables are deployed in this building to connect every required house to this fiber distribution point, thus providing broadband services to end users.

FTTH cabling solution

Advantages of FTTH

FTTH is an idea cabling solution for home network users who need high and reliable bandwidth for some applications, such as video chats and online conversation. In addition to this, is there any other advantage of FTTH?

  • FTTH is a passive network project which needs no active components, thus the cost of network installation and maintenance is not very high.
  • Fiber optic cable is light, so the installation process does not need much labor..
  • Fiber optic cable has high stability, and it will not be easily corroded by lightning or rain, or cause leakage.
  • Fiber optic cable can provide unlimited bandwidth. The development of technology leads to further expansion of people’s demand for bandwidth. For Ethernet cable, different categories have their own data rate limits and transmission distance limits. But for optical fiber cable, the bandwidth limit is up to how much bandwidth the broadband service provider offers.
  • FTTH project is a cost-effective cabling solution for present and future, since you have no need to worry about the upgrade for your cabling system.
  • FTTH project is designed with a lifespan of at least 30 years. Therefore, it is imperative that investments to the FTTH infrastructure are suitable for future needs.
Cable Options for FTTH

FTTH project is applied in many areas, such as indoor section, outdoor section. To fulfill the cabling requirements for different areas, different types of fiber optic cables are well developed.

Indoor cable: FTTH indoor cable is used inside a building or house to connect the FTTH user end equipment. Its fiber count typically is 1, 2 or 4 optical strands, commonly combined with two non-metal enhanced FRP/Metal/KFRP which can provide sufficient tensile strength and good resistance to lateral crushing to protect the fiber inside.

Drop cable: FTTH drop cable connects Network Access Point (NAP) to the subscriber premises. Drop cable contains only 1 or 2 fibers for the connecting circuitry and possibly additional fibers for backup or for other network architecture reasons. It is designed with attributes such as flexibility, less weight, smaller diameter, ease of fiber access and termination.

Distribution cable: Fiber distribution cable is ideal for applications requiring a single termination point with multiple fibers. It has a tight buffered design so it can be installed in intra-building backbone and inter-building campus locations without expensive transitions between cable types.

Conclusion

As a cost-effective cabling solution, it gains great popularity among people. So far, FTTH project has entered thousands of households. What’s more, it has been promoted as a national strategy. So, are you ready to embrace the benefits of FTTH project? FS.COM provides high quality fiber optic cables at low prices, such as single mode fiber and multimode fiber. Also, it provides custom service for fiber optic cabling.

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Focus On Fiber Optic Link Loss

We know that, no natter what component you use, there must insertion loss in your fiber optic cabling. Therefore, in order to make your fiber optic cabling system perform at high level, calculating the amount of insertion loss before cable plant is necessary. This article will focus on fiber optic link loss.

Overview of Link Loss And Link Loss Budget

The link loss and link loss budget are measured in dB. Link loss is the total insertion loss of all optical components in an optical network. While link loss budget is the amount of loss that a cable plant should have. It is calculated by adding the average losses of all the components used in the cable plant to get the total estimated end-to-end loss. The link loss budget has two important functions: during the design stage to ensure the cabling being designed will work with the links intended to be used over it and; after installation, comparing the calculated link loss to test results to ensure the cable plant is installed properly.

How to Calculate Link Loss?

Usually, the loss of four parts need to be calculated: mated pair connector loss, fiber optic splicing loss, fiber optic cable loss and other loss.

link loss calculation

  • Mated Pair Connector—EIA/TIA 568 standard allows 0.75 max per connector

Connector or “connection” loss is the total loss of the mated pair connectors. It’s standard to assume a 0.3 dB loss for most ultras polished connectors. In order to measure the loss of the connectors, you must mate them with similar connectors, or you are likely to experience different losses. Also, a high quality connector is required when testing matted pairs.

  • Fiber Optic Splicing—EIA/TIA 568 max loss is 0.3 dB per splice

According to the Fiber Optic Association (FOA), multimode splices are commonly made using mechanical splices. Best construction practices dictate that even with multimode fiber fusion splicing is ideal. Both forms of splicing generally result in satisfactory results, however fusion splicing proves to be more reliable in adverse surroundings. Single mode fibers that have been fusion spliced will typically have less than 0.10 dB loss. A good average for a skilled installer is generally around 0.05 dB loss.

  • Fiber Optic Cable

EIA/TIA 568 spec for multimode fiber is 3.5 dB/ km at 850 nm and 1 .5 dB/km at 1310 nm. This specification translates into a loss of approximately 0.1 dB per 100 feet for 850 nm, 0.046. dB per 100 feet for 1300 nm. For example, 300 ft multimode fiber optic cable at 850 nm would approximately equal 0.3 dB loss. While for single mode fiber, the loss is 0.5 dB per km at 1310 nm, 0.4 dB per km for 1550 nm.

  • Other Loss—Passive Components and Margin

Don’t forget to count any other passive components you are using in your network. For example, if you are using splitters or filters, add the insertion loss for those components. In addition, it is recommended to add margin to your link loss calculation to adjust for any unforeseen losses. The amount may vary by designer or application but typically 2-3 dB will allow for sufficient headroom in you network link loss calculation.

Conclusion

The fiber optic link loss calculation and analysis are vital in cable plant. After the cable plant is installed, the calculated loss values are compared with the test results to ensure the link can operate properly. Besides, to reduce the link loss, high quality components are required. Quality is everything when gigabit and higher speeds are required. FS.COM provides high quality fiber optic connector, fiber optic cable and fiber optic transceiver at reasonable price. Also, they have test tools, such as light source and power meter.

Set Up 10G Home Network

Nowadays, nobody would deny the importance of the network. It has become an inseparable part of our daily life. As it developed, people’s demand for bandwidth is increasing. And 10G network is widely applied in small and middle sized business. In addition, 10G home network can be also commonly found. This article will share some tips to set up 10G home network.

Consideration Before Setting Up 10G Home Network

Why do you need 10G network? It is not difficult to find that almost everything nowadays rely on a fast and reliable network, which leads to tremendous traffic and applications running on the network. It is necessary to upgrade your home network to support the growing of your business. Setting up 10G home network avoids network congestion at busy times while improves your productivity.

What do you want from 10G home network? Before you start to set up the network, better planning is needed. You should ask yourself a few questions, such as how many computers, printers and other peripherals will connect to your network? How much wireless coverage will you need at your location? What type of mobile devices will need access to your network?

Needs for 10G Home Network
10G Switch

To build a 10G home network, several components are required: 10G core switch, access switch with 10G uplink, and 10G network interface cards for servers and storage devices. The past few years had witness the price dropping of 10G network switch. For example, the cost of Ubiquiti Unifi and Edgeswitch switch are only $200. You can also find many 10G switch under $550, such as FS.COM 10G network switch S3800-48T4S only costs $480 by offering 48 100/1000Base-T and 4 10GE SFP+ ports.

10G switch
10G Cabling

There are two cabling ways for 10G home network—10GBASE-T and 10G SFP+.

If you choose 10GBASE-T, then upgrading the existing 1G network to 10G can be simple. If 10G switch is designed with RJ45 ports, you can use the same RJ45 network cable to connect the 10G switch with your server, storage and some other switches. The only difference is to use Cat6a network cable instead of Cat5e and Cat6 cable, because Cat6a can support 10G data rate over 100 meters; or you can choose SFP+ 10GBASE-T module with 2.5W power consumption and a maximum distance of 30 meters.

10G cabling

For 10G network switch that supports 10G SFP+, you can use it with devices that come with 10G SFP+ ports, too. For server or storage devices with 10G SFP+ port, the most cost efficient way to connect them with 10G network switch is to use 10G DAC cable (direct attach cable). It is basically copper cable with SFP+ connector on both sides. But this cabling way is only suitable for short connectivity. For data link over 100 meters, a pair of SFP+ modules and the matching fiber optic cable are needed. Depending on the length required in home network, you can use 10G optics such as 10GBASE SR SFP module and multimode fiber to reach 300 meters.

Conclusion

For home network set up, 10G is a trend. But before you migrate your network to 10G, you still have to think about what you want or what you need. After that, the choice for components and cabling procedure can be easy. FS.COM provides comprehensive 10G solutions: all the components mentioned to build a 10G home network are available at FS.COM, including 10G switches, network cables, 10G SFP+ transceivers, fiber patch cables and DAC cables.

Cisco Nexus 7010 Vs. Nexus 7710

We know that fiber optic cable and transceiver are important components to complete the whole optical link. In addition, there is another core component in data center—switch, which is the nerve center of the whole network deployment. This article will introduce two Cisco switches—Cisco Nexus 7010 switch and Cisco Nexus 7710 switch, and make comparison between them.

Overview of Cisco Nexus 7010 Switch And Cisco Nexus 7710 Switch

Characterized by high availability and scalability, comprehensive Cisco NX-OS Software data center switching feature set, Cisco Nexus 7010 switch and Nexus 7710 switch are designed to satisfy the demand for high switching capacity in data centers. As Cisco Nexus 7700 Series switches are the latest extension to the Cisco Nexus 7000 Series switches, there are similarities and differences between Cisco Nexus 7010 switch and Nexus 7710 switch. How much do you know about them? Keep reading and you will find the answer. The following figures show Cisco Nexus 7010 switch and Cisco Nexus 7710 switch.

Cisco Nexus 7010

Figure 1. Cisco Nexus 7010 switch

Cisco Nexus 7710

Figure 2. Cisco Nexus 7710 switch

Cisco Nexus 7010 Vs. Nexus 7710

From the above figures we can have a basic knowledge of Cisco Nexus 7010 switch and Cisco Nexus 7710 switch. And the following part will focus on the similarities and differences between them.

Similarities Between Cisco Nexus 7010 Switch And Cisco Nexus 7710 Switch
  • Both of them are 10-slot chassis switch with 2 dedicated supervisor modules and 8 I/O modules.
  • Both of them are structured with 384 x 1 and 10 Gigabit Ethernet ports.
  • Both of them utilize front-to-back airflow which can ensure that switch addresses the requirement for hot-aisle and cold-aisle deployments to help provide efficient cooling.
  • Both of their I/O modules and supervisor modules are accessible from the front, and fabric modules and fan trays are accessible from the back of the chassis.
  • Both of their fan trays are composed of independent variable-speed fans which can automatically adjust to the ambient temperature, and this helps reduce power consumption in well-managed facilities while enables optimum operation of the switch.
  • Both of their systems not only allow hot swapping without affecting the system, but also support air filter to promote clean airflow through the system.
Differences Between Cisco Nexus 7010 Switch And Cisco Nexus 7710 Switch
  • Cisco Nexus 7010 switch has 48 x 40 Gigabit Ethernet ports, and 16 x 100 Gigabit Ethernet ports. While Cisco Nexus 7710 switch has 192 x 40 Gigabit Ethernet ports, and 96 x 100 Gigabit Ethernet ports.
  • Cisco Nexus 7010 switch has 5 fabric module slots and 3 power supply slots. While Cisco Nexus 7710 switch has 6 fabric module slots and 8 power supply slots.
  • Cisco Nexus 7010 switch supports Fabric—1 and Fabric—2 modules while Cisco Nexus 7710 switch supports only Fabric—2 modules.
  • Cisco Nexus 7010 switch is designed with 21RU height, bigger than Cisco Nexus 7710 switch’s 14RU height.
  • Cisco Nexus 7010 switch uses dual system and fabric fan trays for cooling. While Cisco Nexus 7710 switch uses three redundant fan trays for cooling.
  • The maximum inter-slot switching capacity with the Cisco Nexus 7010 switch is 550 Gbps while Cisco Nexus 7710 switch can achieve the maximum inter-slot switching capacity of 1.2 Tbps.
  • Cisco Nexus 7010 switchsupports F1, F2 and F2e line cards while Cisco Nexus 7710 switch supports F2e and F3 line cards.
  • Cisco Nexus 7010 switchsupports SUP1, SUP2 and SUP2E supervisors while Cisco Nexus 7710 switch supports only SUP2E supervisor engines.
  • Cisco N7K-C7010-FAN-Sis US $1,100.00 on eBay while Cisco N77-C7710-FAN is US $1,299.99.
Which One to Choose?

Both Cisco Nexus 7010 switch and Cisco Nexus 7710 switch are designed to meet the scalability requirements of the largest cloud environments. As for which one to choose, it all depends on your individual requirements. If you need higher switching capacity and smaller size, you can choose Cisco Nexus 7710 switch; if your budget is tight, Cisco Nexus 7010 switch is a good option; if you want your switch to support F1 line card and SUP1 supervisor engineer, you have to buy Cisco Nexus 7010 switch. FS.COM provides large stock single mode fiber patch cables and multimode fiber patch cables. Also, they have various types of Cisco compatible transceiver modules for Cisco switch.

Originally published at: http://www.fiber-optical-networking.com/cisco-nexus-7010-vs-nexus-7710.html