User guide

Applications
Optical fiber is immune to EMI/RF interference, ground loops, and high voltage surges from lightning or
ground faults, and is ideal for electrically noisy environments such as near large power sources, electrical
motors, and radio communications equipment. Additionally, copper twisted pair Ethernet is limited to
100m/328ft without extenders. Using fiber optic cable provides long distance service (up to 120km/74mi.)
without any additional equipment.
Safety benefits of fiber optics
Placement of all-dielectric fiber optic cable (instead of copper) completely eliminates the presence of a
remote ground, which dramatically increases safety of personnel and reliability of equipment. By using
fiber optic cable, the 2 Channel POTS w/ Ethernet system provides absolute electrical isolation between
fiber network devices.
Connection Diagrams
The diagrams below show the two different models of the POTS system. Refer to the Ordering Information
and Specifications sections for additional information.
2 channel POTS w/ Ethernet system connection diagram
2 channel POTS w/ Ethernet system
with ringdown circuit connection diagram Installation
Page 4" " " RLH Industries, Inc. • Tel. 866-DO-FIBER • Fax [phone] • www.fiberopticlink.com