Keep copper access simple when the network needs flexible port economics and predictable interoperability. This AddOn 4-pack is built for Citrix EW3A0000235 compatibility and supports 10/100/1000BASE-TX operation for Gigabit Ethernet environments that still depend on RJ-45 connectivity. It is a straightforward fit for switch ports that need to serve mixed-speed endpoints without introducing a separate media conversion layer. The TAA-compliant designation makes it suitable for regulated procurement paths, while the 4-pack format helps standardize spares and rollout planning across multiple closets or sites. For teams managing refresh cycles, that matters: you get a consistent module set that can be deployed where copper handoffs are still the right answer. This is a practical choice for access-layer expansion, replacement inventory, and environments where compatibility is more important than feature inflation. It gives you a clean path to maintain service, preserve purchasing alignment, and keep copper-based network segments running with minimal friction.