A Fiber Termination Box (FTB), also known as an Optical Terminal Box (OTB), is a crucial component in Fiber to the Home (FTTH) applications.
Its primary function is to efficiently manage and terminate fiber optic cables, connecting the cable’s core to a pigtail.
This guide will provide an in-depth overview of fiber termination boxes, their components, and their various types.
1. Components of a Fiber Termination Box
A typical fiber termination box consists of three main parts:
- Fiber Connector Protection Element
- Internal Components
- Housing
The internal components are usually protected by an IP-rated housing made from sturdy, impact-resistant materials. This ensures the components are safeguarded against damage during operation and placement.
2. Importance of Durable Housing for Outdoor Deployments
When deploying fiber termination boxes outdoors for extended periods, it is crucial to choose a housing that is:
- Dustproof
- Corrosion-resistant
- Easy to open
- Equipped with a locking mechanism to prevent unauthorized access
3. How to use a Fiber Termination Box
Fiber termination boxes serve as a device for fiber optic network terminal access and management.
They offer superior reliability and flexibility compared to traditional terminal boxes. FTBs are typically installed on walls in user rooms or on racks in telecom rooms.
They connect to various equipment, such as fiber optic cables, optical cats, and optical switches, to provide data transmission, network connectivity, and other services to end-users.
4. Types of Fiber Optic Terminal Boxes
Wall Mount Fiber Optic Termination Boxes
- Ideal for field installation of pre-connected cables, connectors, or pigtail field connections
- Serve as a termination point for feeder cables connecting to drop cables
- Suitable for entry terminals, computer rooms, telecommunication cabinets, and primary cross-connects
Rack Mount Fiber Optic Termination Boxes
- Integrate fiber splicing, termination, distribution, storage, patching, and management
- Designed for cross-connect and interconnect topologies
- Easy to maintain due to pull-out design
Outdoor Fiber Optic Termination Boxes
- Highly durable enclosures for distributing fiber in FTTX networks
- Sealed to protect cables from environmental damage
- Used for fiber splicing, termination, and cable management in outside wall mount applications
Indoor Fiber Optic Termination Boxes
- Serve as a transition point between risers and horizontal fiber optic cables
- Provide storage for extending and terminating fibers
- Act as a connection point for splicing fibers
- Offer space for ultra-long terminated fibers and fiber convergence
5. Differences between ODF, Termination Box and Distribution Box
- ODF (Optical Distribution Frame)
- Metal fiber terminal box, also known as a fiber optic patch panel
- Typically mounted on 1U height 19″ rack in data centers
- Conventional port numbers: 24 or 48 ports, with a minimum of 12 ports
- Some designs are wall-mountable
- Small fiber terminal box placed at the end of horizontal optical cables
- Leads out drop cables by coupler to fiber patch cords for fast connection
- Nearest terminal device to connect ONU (Switching equipment or PC)
- Usually has 1, 2, or 4 ports
- Designed for wall-mounted or desktop applications
- Interface device for connecting feeder cables and distribution cables
- Used in outdoor, corridor, and indoor environments
- Widely applied in FTTH and FTTB fiber optic networks
- Typically has 24 or 48 ports, with some designs featuring 4, 6, 8, 12, or 16 ports for small businesses or villas
- Mostly wall-mounted, with pole mount as an option
