... name: BD-OP-E1Product function: E1 fiber modem is to modulate framing (N*64Kbps) to single ... can also be used pair with V.35 fiber modem.ENVIRONMENT REQUIREMENT: EnvironmentThe device operate temperature range wide, ... (h) ORDER INFORMATIONBD-OP-E1/AC220V E1 fiber modem,sigle fiber 20km,power AC 220VBD-OP-E1/DC- ... 48VBD-OP-FE1/AC220V Framed E1 fiber optic modem,sigle fiber 20km,power AC 220VBD-OP-FE1 ...