Compliance International supports approval of your telecommunications equipment including network interfaces such as PDH (E1, E2, E3, DS3, STM 1electrical), SDH (STM-1/4/16/64), Ethernet Electrical Interface, OTU- 1/2/3/4, Ethernet Optical Interface- 1G/10G/40G/100G, GPON, EPON, XGPON, XGSPON, NGPON2, WDMPON, 2-Wire, PRI, BRI etc.