ADD-ON COMPUTER PERIPHERALS, INC. NTK585BQ-AO AddOn - SFP (mini-GBIC) transceiver module (equivalent to: Ciena NTK585BQ) - GigE - 1000Base-DWDM - LC single-mode - up to 49.7 miles - channel: 42 - 1543.73 nm - TAA Compliant - for Nortel Optical Multis