In the last 20 years, long-haul transmission networks were upgraded to transport digital signals due to the huge growth of the information technology market (metropolitan-area networks, ...

Part 1 – Multiplexing combines multiple discrete signals into one composite transmission. Familiarity with direct-to-line systems enhances a technician’s repertoire. A common complaint for employers ...

The concept of noise power ratio (NPR) has been around since the early days of frequency division multiplexed (FDM) telephone systems. The NPR is simply a measure of the “quietness” of an unused ...