Fiber optic cables are moving closer and closer to the end users and serving more and more customers with higher bandwidth. Projects like FTTH (Fiber to the Home), and FTTB (Fiber to the Building) are quite common now. Except higher bandwidth, optical fiber can also provide longer transmission distance and secure transmission environment. To future extend the reach of optical fiber and enjoying better services, Fiber to the Desk (FTTD) is recommended, especially for companies and organizations who have high requirements in both distance and data security during signal transmission. However, a significant factor that prevents the widespread of FTTD is the cost. Fiber optic cables and optical transmission devices are considered to be too expensive. In fact, if properly designed, Fiber to the Desk could also be affordable. And the prices of fiber optic cables and the optical components are much lower than before. This post will offer a case of FTTD deployment for your reference.
As most of the FTTD applications are required in office buildings, a typical FTTD deployment case in a four-floor office building will be introduced. The following picture shows the main structure of this office building. Floor 1 is designed as server room to provide bandwidth for the whole building. Floors from Floor 2 to 4 are office areas.
Three parts should be finished to deploy FTTD project in this office building. The first two parts are server room cabling and office area cabling, which are closely related. Fiber optic cables from the service provider are firstly connected to devices in server room, and then distributed to other areas in this building. The final part is terminating the fiber optic cable at the office desk.
Server Room Cabling
Fiber cable installer should plan the type and number of fiber cables and connectors/interfaces used for distribution in advance. Which types of switches and devices should be used in the server room? How to distribution fiber optic cables to each desk from the server room?
As fiber optic cable is fragile and not easy to manage, thus, decreasing the fiber count is necessary in FTTD project. The using of BiDi transceiver could be an effective way in building FTTD network, which can provide duplex transmission over a single fiber. Layer 3 switches are recommended to deploy of this network. In many cases, 24-port/40-port SFP/SFP+ layer 3 switches are recommended.
|BiDi SFP Module||Simplex Fiber Patch Cable||Layer 3 Switch|
For better cable management in server room, IT racks, fiber enclosures and fiber adapter panels should be used. 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.
|Open Frame Rack||Fiber Enclosure||Fiber Adapter Panel|
Office Area Cabling
As Floor 2, Floor 3 and Floor 4 are office areas, in these areas, fiber optic cables should be deployed to every room and every office desk. For better management, a distribution hub is suggested to be deployed on each floor. If number of the office desks connected to the network is very large, it is recommended to deploy a distribution point for each or several rooms. The setting of distribution points or hubs should depend on the total number of the end users.
Terminating Fiber Optic Cable at Office Desk
The final part to finish FTTD in this building is terminating the fiber optic cable at the office desk and connecting the fiber optic cable to the target devices, like computer and VoIP Phone. fiber optic wall plate should be used. The port count and port type of the wall plate are decided by the connections specifications.
As most of our devices only have electrical interfaces, the optic signals should be converted into electrical signals. Thus, an additional ONT should be added. A length of fiber patch cord is needed to link the ONT (optical network terminal) to the wall plate port. Then, the target devices are linked to the ONT for data transmission (as shown in the above picture).
|Fiber Optic Wall Plate||ONT||Fiber Patch Cable|
Deploy fiber optic cabling in the server room and office area, then, terminate the fiber optic cable at the office desk, the Fiber to the Desk project of this 4-floor office building is finished. The above mentioned products like BiDi transceivers, fiber patch cable and fiber enclosures are all available in FS.COM. All these high quality products come in a variety of types with favorable prices. Kindly contact firstname.lastname@example.org for more details, if you are interested.
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