ZTE OL1x4 OL1*4 S-4.1/L-4.1/L-4.2 4xSTM-4 Optical Line Board for ZTE ZXMP S385 SDH transmission Part Number: ZTE OL1x4 Brand: ZTE Description: ZTE Optical Line Board for ZTE OL1x4 Supplys service includes: cost-effective equipment faster delivery worldwide shipping alternative supply sample service test and warranty