Line Power for Passive Optical LANs
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What is POL?

Many enterprises have recognized that their current copper-based (CAT5/6) Local Area Network (LAN) architecture is reaching the limits of bandwidth capacity. The bandwidth constraints have led to the emergence of a new, high bandwidth, fiber optic-based technology called the Passive Optical LAN (POL). Built on the foundation of the Passive Optical Network (PON), the POL is a point-to-multipoint network architecture where voice, video and data services are transported at gigabit speeds via single optical fiber to serve multiple users.

Powering POL

The conventional means of powering remote devices is through a rectifier or UPS connected to a local source of electricity. This local power technique is costly, requires batteries at each remote device, and is prone to downtime during electrical outages. Alpha Technologies offers an alternative to the local power technique that provides a more reliable and resilient solution along with a significantly lower total cost of ownership. Alpha’s technique, known as POL Line Power, uses copper cabling run alongside the fiber cables to deliver DC power to the remote devices from a centralized source.
In Alpha’s POL power architecture, Line Power equipment, a 48Vdc power plant, and batteries are located in a central site such as a telco equipment room. This highly reliable source of power is then distributed over standard 12AWG to 20AWG copper cable or composite fiber/copper cables to energize the remote nodes. The power circuits meet the National Electrical Code (NEC) requirements for Class 2 circuits, i.e., current-limited 100 Watt circuits that are safe from a fire initiation standpoint and provide acceptable protection from electrical shock. Traditional copper cable can be used in this architecture, eliminating the need for protective conduits or installation by licensed electricians. At the remote device, the copper cable pair connects directly to the Optical Network Termination (ONT).

Alpha Technologies POL Line Power products are reliable, field proven options for remote network powering.

Key Benefits of Passive Optical LAN

• Significant savings in CapEx and OpEx costs
• Future-proof of the infrastructure so only the endpoints need upgrading
• No active electronics between the data center and end user for many miles
• Ultra-secure, highly reliable with Five-9’s of availability
• Reduction in installation time, cabling costs, floor space, power consumption & HVAC requirements

Press Release: Powering innovations for Passive Optical LAN Over recent years both Alpha Technologies and Tellabs have contributed significant powering innovations for the Passive Optical LAN industry that have resulted in more elegant remote 48V DC powering solutions for the ONTs that are faster to install, more secure in a classroom environment and have better aesthetics.

100VA Class 2 Distribution System

eLimiter+ is a unique, modular line powering solution that meets the NEC requirements for both Class 2 outputs and communications circuits. The system can be used to distribute -57Vdc in data cable raceways to remotely power network equipment without the need to utilize conduit. This dramatically reduces CAPEX costs, simplifies installation of equipment and increases overall speed of deployment.

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Cordex HP 1.2kW

Cordex HP™ 1.2kW
Front Access Rectifier Shelf Systems

Designed specifically for restricted space installations, this 48Vdc power and distribution system incorporates reliable 48V, 1.2kW Cordex rectifier modules and a complete front access design, allowing for all connections in front of the rack channel.

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Alpha Technologies is a member of the Association for Passive Optical LAN (APOLAN)

The Association for Passive Optical LAN is a non-profit organization composed of manufacturers, distributors, integrators, and consulting companies who are actively involved in the Passive Optical LAN marketplace. Our members support the growth and education of the Passive Optical LAN industry and are focused on formulating solutions on how best to market, install, educate, and support this burgeoning field.

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Burnaby, BC V5J 5M4 Canada
Canada & USA 1-800-667-8743  |   International +1 604-436-5900