With the introduction of PCM technology in the 1960s, communications networks were gradually converted to digital technology during the years that followed. To cope with the demand for ever-higher bit rates, a multiplex hierarchy or plesiochronous digital hierarchy (DSn) evolved. The bit rates start with the basic multiplex rate of 1.5 Mb/s with a further […]
Month: May 2015
7 Reasons Why SDH (Synchronous Digital Hierarchy)?
Communications networks gradually converted to digital technology after PCM was introduced in the 1960s. A multiplex hierarchy known as plesiosynchronous digital hierarchy (PDH) evolved to cope with the demand for everhigher bit rates. The bit rates start with the basic multiplex rate of 2 Mbps with further stages of 8, 34, and 140 Mbps. In […]
Cable attributes Explanation From ITU
Since the geometrical and optical characteristics of fibres given in clause 5 are barely affected by the cabling process, this clause gives recommendations mainly relevant to transmission characteristics of cabled factory lengths. Environmental and test conditions are paramount and are described in the guidelines for test methods. Attenuation coefficient The attenuation coefficient is specified with […]
Fibre attributes explaination from ITU
This article is for beginners to learn basic concept appeared in fiber specifications Only those characteristics of the fibre providing a minimum essential design framework for fibre manufacture are recommended in this clause. Ranges or limits on values are presented in the tables of clause 7. Of these, cable manufacture or installation may significantly affect […]
Intdoduction to Fiber Verification Testing
As fiber links support higher-speed network bandwidths with increasingly stringent requirements, it’s becoming more important to ensure your backbone links meet tightening loss standards. The need for higher data transmission capacity continues to increase as network applications grow and expand. These higher transmission speeds demand cabling that delivers increased bandwidth support. This test and troubleshooting […]
Advantages of Medium-Voltage UPS Technology
Fast-growing online activity over the last decade has forced a rapid rise in both space and electrical power required to operate data centers. Accordingly, power density becomes higher, and cooling of these data centers becomes critical. Economies of scale mean single data center locations have grown larger, with a demand for a safe power supply […]
Taking Copper to Greater Heights With Best Practices for Pair Bonding
Today, more than 1 billion households are still connected to a copper line.1 As the reality of supporting HDTV and video in just about every room has become the norm and no longer a luxury, higher bandwidth for Triple Play Services (voice, data, and video) continues to see a growing demand. Leading telco service providers […]
IMS 2015: Everything Else You Need to Know
At IMS 2015, there will be a plethora of special events, honorary sessions, exhibits, and even a boot camp or two. These sessions and special functions are designed to add value to the RF/microwave community outside of the traditional sessions and networking. Adding some fun and flair, IMS 2015’s blog is highly interactive and has […]