EXFO America Inc. AXS-805-E1-DS3 E1/DS3 test moduleDual TX/RX E1 interfaceDS3 TX/RX interfaceE1 testing including:-Dual TX/RX E1 simultaneous testing Terminate mode, Monitor/Bridged mode, CSU/NIU emulation, Fractional E175 and 120 O- BERT with auto detection- Defect generation