CLX Redundancy Premium Module

You can use the 1756-RM3 redundancy module in redundancy applications. The 1756-RM3-2SFP module is functionality equivalent to a 1756-RM3 module. The difference is that two small form-factor pluggable (SFP) fiber-optic transceivers ship with the 1756-RM3-2SFP module. The 1756-RM3-2SFP module is intended to be one catalog number for a functional replacement of a 1756-RM2 module in an existing redundancy system.