Nortel 25UTM00733EAR (OPTera Metro / PDH-SDH / Passport-MSS / networking portfolio) Telecom System Card / Module

The Nortel 25UTM00733EAR is designated a 140 Mbit/s OLTU on our supplier record. In transmission equipment an OLTU is an optical line terminal unit: the card that terminates the fibre line and converts between the optical span and the electrical side of the shelf. 140 Mbit/s is the highest level of the European plesiochronous hierarchy. We have taken that description straight from the supplier record rather than inferring a specification around it, so the host system is worth confirming before you order.

Nortel’s transmission range covered optical line terminals, plesiochronous and synchronous multiplexers and the analogue line plant that fed them. Part numbers in this style identify plug-in units rather than complete systems, and the same abbreviation can appear on units built for more than one subrack, which is why we prefer to confirm the platform physically.

If you can tell us the system this is going into, or send a photograph of the board label, we will check the unit we hold against your requirement before you order. Tech-Star (UK-based, shipped worldwide) sources and supplies Nortel hardware to order. Get in touch with our sales team for availability, tested condition and a price.