When upgrading to Ethernet-based communications, we were on the lookout for a relatively reliable and standardized solution that supported recognized redundancy standards. For mission-critical, time-sensitive substation applications, network interruptions as short as a few milliseconds can have a severe impact on system operations and jeopardize the safety of onsite personnel. For this reason, we needed a solution that could quickly connect our legacy devices to networks guaranteed to provide bumpless operation, even in the face of single points of failure.