The vBNS installed one of the first ever production OC-48c (2.5 Gbit/s) IP links in February 1999, and went on to upgrade the entire backbone to OC-48c.
In February 1999, the vBNS deployed a production-ready OC-48c (2.5 Gbit/s) IP link. This marked the beginning of a transition where they upgraded their entire network backbone to utilize this technology.