R&M Supports POL Cabling

What is happening
The Passive Optical LAN (POL) concept promises Gigabit speed to the terminal. It is offered as a cost-saving, high-performance alternative to traditional structured and application-neutral LAN cabling. Surveys by manufacturers and market researchers have predicted a POL boom between 2015 and 2020.

Good to know
The advantages of POL are reduced costs for setting up and operating the system. The savings are the result of no longer needing network devices due to simpler network structures with large installations, to network devices becoming less expensive and to cabling being simpler. Particularly suitable application areas for POL are large, extended LAN installations with a high number of workstations to be connected. POL is also particularly suitable for environments with limited space for cable routing and floor distributors. A Passive Optical LAN can cover distances of up to 20 kilometers.

However, POL granularity tends to be really approximate and, for optimum capacity utilization, a network interface card in the OLT should be able to operate 256 workstations. All connection points envisaged at one workstation (including reserves) have to be developed from the outset with POL. This means that a lot of active ports remain unused. This has to be taken into consideration in calculations.

It should also be borne in mind that all workstations which are connected to an OLT port via a splitter share the bandwidth of this connection.

A further important factor is energy consumption. POL does work passively in signal distribution, which means it does not need any active devices on the transmission link. However, the distributed switches at the workstations do need a power supply. The varying life cycles of passive and active POL components, which form a symbiosis in the transmission channel, can be a disadvantage.

R&M’s FO range always enables the setup of a reliable POL infrastructure that bears costs in mind. The cabling can be ordered pre-terminated or assembled in the field. There is a complete portfolio available: optical distribution components, splitter and splice trays, connectors and outlets.

R&M’s long years of experience in the FTTH and LAN cabling sectors can be combined to use synergy effects and provide the customer with an optimal solution.

Help us improve. Send your feedback and suggestions to connections@rdm.com

Dr. Thomas Wellinger

By Dr. Thomas Wellinger

Market Manager Data Center