... phone, 2 wire E/M, 4 wire E/M, telegraph, V.35, V.24/V.28, 64K, N×64K, Ethernet subchannel card. E1 port ... : contains 4 channels asynchronous RS485 data -FV.35 card: contains 1 ch synchronous V.35 data of N×64Kbps data rate, N is ... Ω is optional-4E1 PDH card: access 4 E1s Specifications * Optical Fiber Interface-Port number: 1-2, support redundant backup-Bit rate: 150Mbps ...