Features:1) Line interface 2) Fully conforms to standard of YDN 056-1997 3) Transmission rate: N x 64Kbps + 8Kbps (N=3~36) 4) Code: PAM16 5) Line impedance: 135 ohm 6) Signal electrical level: +13.5 +/- 0.5 dBm 7) Line wire interface: a pair of passive twisted-line, RJ45 8) Code error rate: d10 - 9 9) Transmission distance without linkup: 3.5~9.7km (0.4~0.8mm wire size) 10) Data interface 1 (E1 interface) feature11) Transmission rate: N x 64Kbps (N=1~32) 12) Line coding: HDB3 13) Line impedance: 75 ohm/120 ohm 14) Interface standard: conforms to CCITT G.703 standard 15) Data interface: (V.35 / V.24) 16) Transmission rate: N x 64Kbps (N=3~36); V24 (64k; 128k) 17) Work mode: DCE 18) Work circumstances 19) Power supply: 220VAC?0%, 50Hz; 48V DC (optional) 20) Power consumption: <5W 21) Dimensions (L x W x H): 225mm x 145mm x 40mm (9" x 5.8" x 1.6")22) Temperature: 0 ~ +40癈 23) Relative humidity: 0 ~ 95% producing area:China payment:T/T in advance