... E/M, 4 wire E/M, telegraph, V.35, V.24/V.28, 64K, N×64K, Ethernet subchannel card. E1 port can be 75Ohm or ... to ITU-T V.24/V.28 standard-RS485 data card: contains 4 channels asynchronous RS485 data -FV.35 card: contains 1 ch synchronous V.35 ... data of N×64Kbps data rate, N is from 1 to 30-10/100M Ethernet card: providing 4 ...