Some telecom carriers are still using the Nortel OpTera Metro 3500, or OM3500 platform. Well Nortel is no longer in business. Are replacement spares still available? YES!
TruePulse carries a broad range of OM3500 cards, including wavelength specific ones. For example, we have in-stock the NTN442FC, DWDM OC-48 LR 1555.75nm , HECI SOC1V07LAF
Other wavelengths in-stock include, NTN442AB, NTN442AC, NTN442AJ, NTN442BJ, NTN442BM, NTN442CJ, NTN442CL, NTN442DM.