Phybridge Inc. FLXLK-PLUS FLEX-Link Plus Adapter/Extender - Single Unit - 1 Year Warranty Included. The FLEX Link Plus adapter is an Ethernet extender that extends Ethernet and high power over 2 or 4 pair UTP. It is used with the FLEX 24 Port switch and FLEX 8 Port switch to support long reach requirements. The FLEX Link can be locally powered to provide higher power to the end point. The FLEX Link Plus is IEEE compliant and can deliver more power to the end point than the FLEX Link.