EXFO America Inc. AXS-855-1-DS1-DS3 Ethernet 10/100/1000 Electrical and GigE Optical Test ModuleDual TX/RX DS1 interface/ DS3 TX/RX interface Ethernet testing including: - Single port 10/100/1000 Base-T Electrical and GigE optical interface - Supports BER, RFC 2544, and IP connectivity tes