Marconi/Nokia T30023.03 Nokia Synfonet / Marconi SDH transmission Optical Transmission Module

The Marconi/Nokia T30023.03 is a Synfonet STM-4 optical interface unit, one of several builds sharing the T30023 base number. All of them terminate a 622 Mbit/s SDH span at the node; what changes between suffixes is the optical variant and the software release the unit was built for. Because Synfonet shelves are commissioned against a specific release, we treat the suffix as part of the identity rather than a detail, and we check it physically before anything is despatched.

The Synfonet range covers SDH add and drop multiplexing and small cross connection at STM-1, STM-4 and STM-16, and it survives today mostly on private networks in transport, utility and public sector use. Nokia developed it, Marconi acquired it in 1999, and neither company supports it now, so every remaining site depends on the secondary market for plug-in units, subracks, power assemblies and fan parts. The suffix after the decimal point identifies the build variant and is not always interchangeable within one base number.

If you can give us the model or the release you are matching, we will confirm what we hold before anything ships. Tech-Star is UK-based and ships worldwide. Contact our sales team for current stock, condition details and pricing.