Nortel NTHR21BA (telecommunications transmission and networking portfolio) Telecom System Card / Module

The Nortel NTHR21BA is a 4-port OC-3c single-mode intermediate-reach ATM Function Processor for the Nortel Passport 15000 platform, an earlier hardware release of the same card family as the NTHR21CA this catalogue also carries. It supplies four OC-3c (155Mbps) single-mode fibre ATM ports at intermediate optical reach, allowing a Passport 15000 shelf to terminate ATM trunk or access circuits over fibre. Passport 15000 switches remain in service at a number of established carrier sites running ATM infrastructure, and a genuine function processor such as this one is a routine requirement when maintaining or expanding port capacity. Tech-Star (UK-based, shipped worldwide) supplies Passport 15000 hardware to support ongoing network maintenance. Confirm exact release and shelf compatibility before ordering, as earlier hardware releases can differ in supported features from later ones.