Attenuation reduction of the signal magnitude or loss, caused by absorption and scattering Values are normally expressed in decibels (dB) Attenuator a passive device for reducing the amplitude of a signal without distorting the waveform Bidirectional a device, which operates in both directions Broadband Device optical broadband devices cover a wide range of wavelengths Center […]
PON architectures for FTTH deployments are currently based on passive optical splitters to distribute the bandwidth to each customer using fiber splitters providing ratios ranging up to 1:64 or even 1:128. The physical PON FTTH architecture typically supports the Ethernet protocol. PON network feeds a variety of optical network terminations (ONTs) or optical network units […]
HFC and FTTH networks differ in that HFC extends fiber to a node within a mile of the home or business, while FTTH extends fiber all the way to the home or business—typically terminating the fiber at a customer premises device, which then provides service to devices in the home over copper lines, coaxial cable, […]
Optical fibre has incredibly low loss coupled with extremely high capacity, making it a unique transmission medium. From the point of view of the access network The Shannon Limit can effectively be ignored. Distance is not an inherent limitation as optical signals can travel 70–80 km before they need to be amplified. Instead the limitations […]
Proper testing is a critical part of installing, activating and maintaining a PON. While most components are tested during the manufacturing process, they are tested again after splicing and installation of splitters and access terminals. Field testing is required to ensure no excess loss or reflectance has been introduced due to micro-bends in installed fiber, […]
1. Use an ONT (Optical Network Terminal) / ONU (Optical Network Unit) Tester to determine if the ONT/ONU at the subscriber’s end is responding to downstream signals from the OLT (Optical Line Terminal). The Active ONT /ONUidentifier clamps on to 0.9mm buffered fiber, or 2mm or 3 mm jacketed fiber, or 2.0mm x 3.0mm drop cable, senses and […]
