Specifications

Rockwell Automation Publication AG-SG001G-EN-P - April 2015 31
Choosing a Telemetry Network Chapter 2
Disadvantages
• You can encounter longer transmission delays, measured in seconds rather
than milliseconds as for other media.
• You incur a large initial cost for the satellite dish and supporting
equipment.
Equipment Required
• Access to satellite
• Satellite transmitters
• Earth-bound receiving parabolic-dish antennas
Cellular Network
Advantages/Capabilities
• High-speed broadband Ethernet connections readily available in
metropolitan areas, as well as in many rural areas where no other
communication options exist other than satellite
• Lower fixed and monthly costs vs. satellite
• Minimal capital costs
• Remote access possible to/from anywhere on the Internet
Disadvantages
• Dependent on a public network (may not be available when needed most)
• Requires network security precautions to prevent unauthorized access
Equipment Required
• Cellular Ethernet router/modem
• Ethernet security hardware (for example, firewall or VPN)