Many couplers are not rated for high speed networking.
Cables and Connectivity Solutions, inline couplers
All versions and serial ranges
Customers need to connect patch cables together to extend the length of high speed network cables.
Yes, APC does manufacture an RJ45 Cat 5E rated coupler.
The part number is 47136WH.
This and other APC Cabling and Connectivity Solutions products such as Cat 5E, Cat 6 and Cat 6A cables, fiber optic cables, USB cables and adapters, multimedia cables, monitor cables...etc, can be found at: www.apccables.com