This Axiom 10-Gbps X2 ER (Extended range) transceiver offers cost effective fiber connectivity for HP switches, data center product lines and applications. The X2-10GB-ER transceiver supports link spans up to 40-km with single-mode fiber (SMF). The J8438A-AX, Axiom transceiver module is designed to provide optimal performance and reliability. Each X2 transceiver is tested to ensure guaranteed compatibility and meets all industry standards and HP specifications. Every Axiom X2 transceiver complies fully with the Multi-Source Agreement (MSA); which enables this transceiver to work in all MSA complaint platforms as well as function with other manufacturer's brands within the same network.