OTN Interfaces | Difference between OTU1,OTU2,OTU3,OTU4
This page compares OTN Interfaces OTU1 vs OTU2 vs OTU3 vs OTU4 and mentions difference between OTU1, OTU2, OTU3 and OTU4 OTN interfaces. Here OTU stands for Optical Channel Transport Unit and OTN stands for Optical Transport Network.
• OTN (Optical Transport Network) consists of various optical network elements connected by optical fiber lines.
• They are used for supporting various functionalities in order to maintain optical links carrying client optical signals.
• Typical functions include multiplexing, transport, switching, management, supervision, survivability etc.
• It is defined in ITU-T G.709 standard.
• It uses WDM (Wavelength Division Multiplexing) unlike SDH/SONET.
The figure-1 depicts OTU client signal mapping.
|Line rate (Mbps)||2.666||10.709||43.018||111.809|
|Payload Rate (Mbps)||2.488||10.037||40.150||104.794|
|Frame period (µs)||48.971||12.191||3.034||1.167|
|Frequency accuracy (ppm)||+/- 20||+/- 20||+/- 20||+/- 20|
|Application||It transports SONET OC-48 or SDH STM 16.||It transports OC-192, STM-64 or WAN PHY for 10GBase-W .||It transports OC-768, STM-256 ot 40 GB ETHERNET.||It transports 100 GB ETHERNET Signal.|
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