FlexDSL standalone modem ( NTU) , 1x SHDSL ( TC-PAM16, 2.3Mbps) , Master/ Slave, Multi-Service: 1x E1 ( PRA) 120Ohm ( 75Ohm BNC possible) and 1x Nx64 ( V.35/ V.36/ X.21/ V.24) , accepts Local or Remote Power. 1x SHDSL, 1x E1 ( PRA) 120 Ohm 1x SHDSL 1x E1 ( PRA) 120Ohm and 1x Nx64 ( V.35) 1x SHDSL, 1x Nx64 ( V.35)