hat
◆ Gen twa Loop Retounen Mode: E1 koòdone Loop Retounen (ANA), Ethernet koòdone Loop Retounen (DIG), lòd koòdone nan Ethernet aleka Loop Retounen (REM)
eng
◆ Have three Loop Back Mode: E1 interface Loop Back (ANA)、Ethernet interface Loop Back(DIG)、Command the remote Ethernet interface Loop Back(REM)