EXFO MAX-890 - Page 452

Glossary
444 MAX-800 Series
G.709 Optical Transport Network (OTN)
OTU Frame Structure and Overhead
As shown in the figure below, the OTU frame is broken down into the
following components:
 Framing
 OTL, OTU, ODU, OPU overhead
 OTU FEC
OTU Frame Description