Power Supply Concepts for FTTO Infrastructures

Central vs. Distributed Power Supply Design Guidelines


When you start to think about IT network designs, the first thing that springs to your mind is bandwidth for data transmission. However, bandwidth and data transmission rates are only some points which have to be considered when planning an IT network. A modern IT Infrastructure must also include an energy efficient and secure power supply concept to ensure network availability.

The network power supply includes all the facilities and activities required to supply consumers on the IT network with electrical energy.

Because of their holistic approach, extended flexibility, scalability and redundancy, FTTO (Fibre to the Office) networks offer numerous advantages, which can be enhanced by suitable power supply concepts.

With this in mind, we have developed this Power Supply Design Guidelines which summarises best practices in power supply design and helps to ensure highly available networks.

This Document highlights:

  • What is a central power supply concept, and when should you opt for it?
  • What is the structure of a decentralised, or distributed power supply? And what should you pay attention to in your network design project with a distributed power supply system?
  • How do you build up power supply redundancy and high availability in your FTTO infrastructure?
  • What has to be observed with PoE? What application scenarios are there for FTTO switches with PoE functionality? And how does the power consumption of the switches develop in applications with PoE IEEE 802.3af (15.4W), at (30W), bt (60W +)?
  • Typical planning errors which are easy to make - and to avoid

This document is intended for design engineers and IT managers. It explains various solutions for ensuring power supply concepts in FTTO networks. The document reflects Nexans years-long experience in planning, design, installation and management of secure, efficient and redundant FTTO infrastructures around the world.