ODX042501

ODX042501 is an optical transceiver, operating at 1550 nm. It is the part that turns electrical signals into light at one end of a fibre and back at the other, and it is the component most often got wrong on an order, because two modules can look identical and be entirely incompatible.

The number that decides whether this will actually work: the optical power budget. Transmit power is -19 to 0 dBm and receiver sensitivity is -1 dBm, so the budget is -19 minus -1, which is -18 dB. That is the total loss the path can have before the link stops working. Compare that against the measured loss of your actual path rather than against the distance, because connectors and patch panels often contribute more than the fibre does.

The optical connector is LC/PC. Worth confirming against the patch leads already on site.

Which channel this actually is. The part is fixed to 192.50 THz, a wavelength of about 1557.36 nm, in the C-band. That is the most important line on this page, because a fixed-wavelength part is not tunable: it either matches the channel plan at both ends of the span or it is the wrong part.

That frequency sits on the standard 100 GHz ITU grid, the widest-spaced and most forgiving plan. It will also drop and add on 50 GHz equipment, since every 100 GHz channel is also a 50 GHz channel, so this one is unusually easy to place.

This is SDH-generation equipment, and SDH is a legacy transport technology. The industry moved to packet and to OTN years ago, and the OSN 7500 is not a platform anyone is designing a new network around in 2026.

That is not the same as saying it is useless. A great deal of SDH is still in service carrying E1 and STM-n circuits that work perfectly well, in utilities, rail, broadcast, defence and government networks where the circuits outlive the fashion in transport technology. If that is what you are maintaining, this keeps it running. If you are being offered SDH for something new, push back.

One thing to raise before you order. Huawei transmission equipment generally expects Huawei-coded optics, and a module without the right vendor coding may be refused outright or raise a persistent alarm even when it is electrically identical to the correct part. We supply coded modules for that reason. Tell us the platform, the port, the fibre you have and the distance, and we will confirm this is the right module or point you at the one that is.

Green Code Technologies supplies Huawei optical modules alongside the transmission equipment they fit. We are a supplier of Huawei alongside HPE, Dell, Cisco, Samsung and Netgear, and we would rather confirm a part against Huawei’s own documentation than sell you the wrong one, which on OSN 7500 equipment is worth doing. Send us the platform and port at each end, the fibre you have and the distance and we will come back with a straight answer.