Greater interoperability and seamless communication are the prime motives behind the emergence of OPC UA. While client-server model is the historical way OPC UA applications have been communicating with each other, it is considered more appropriate for point to point communication.
OPC UA Redundancy Server
The uOPC UA Redundancy Server provides fast and reliable data transfer by allowing multiple OPC UA Servers to be configured into redundant pairs. Each redundant pair seamlessly appears as a single OPC UA Server to any OPC UA client application. So using uOPC UA Redundancy Server easily eliminate data loss on single point failure.
OPC Aggregation Server
The uOPC Aggregation Server is a product for aggregating the "Classic" and "UA" based OPC Servers to OPC UA. The Configuration Tool can be used to add Classic DA, HDA, AE and UA servers. Aggregation means bringing together the data from several sources into one common access point, a single server or client purpose.
OPC Tunneller Server
The uOPC Tunneller is a product for eliminating DCOM Configuration settings. It is configurable tool used to add/remove classic DA, AE and HDA Server based on the need. The Tunneller Server is used to bring together the data from several sources into one common access point that is a single server or client.