OC-768
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OC-768 is a fiber optic network line with a SONET rate of 39,813.12 Mbit/s (payload: 38,486.016 Mbit/s; overhead: 1327.104 Mbit/s), or 768 times the basic SONET rate of 51.84 Mbit/s (OC-1). As of 2005, use of OC-768 connections outside of research or testing networks is very rare. However, it is the next logical speed step in what has been a very successful and popular connection standard (SONET) so the widespread adoption and use of this standard in the future is predicted.