Knowledge base
The calculation of the allowable tensile stress in the fiber optic cable
The article describes a series of questions that allow the customer to choose optical cable of optimum design, to distinguish marketing gimmicks of suppliers from objective presentation of technical characteristics. The problems arising because of imperfect design of OC and its components are analyzed. We consider the well-known problem of fibers retracting in overhead optical cables of UT type. There are some tips on how to fix it.
The article details the features of optical measurements for networks PON: kinds of measurements, factors affecting the quality of transmission, measurement schedules and measurable parameters. The problems encountered at such measurements and their solutions are discussed. The necessary test equipment and its parameters important for application in PON are enlisted.
Sequence of operations for installation of bandage tape and tools required for that are as follows.
Designation of the optical cable FinMark consists of several groups of letters and digits meaning the following;
With the growth of application range for optical fibers in different areas of telecommunication sphere, the fibers themselves were impoved gaining new parameters, optimized for different tasks. At the present time several types of optical fibers are used, their properties are specified by recommendations of International Telecommunications Union.
Here you can see visual connection diagrams for terminal and input-output (Add / Drop) CWDM multiplexers at different network topologies (bus, wye), single and bi-fiber connection.
The article considers the equipment used to connect optical fibers by welding, describes its operation principles, methods of optical fibers aligning during welding, as well as characteristics of some models of welding machines and cleavers.
The article considers the main types of instrumentation required for construction and operation of the optical cable networks. Their operating principles, main measurement schemes and parameters of devices are described. Helpful advice is given for entry-level meter-men. There are references to specific models of devices of various types.
