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An OC12 is the abridged term for Optical Carrier level 12 (OC-12), used to dictate the speed level of fiber optic networks. The OC12 speed is measured through SONET or otherwise known as Synchronous Optical Network standards. A DS1/T1 is also called a Dedicated DS1/T1 Frame Relay is basically not used anymore as far the Internet is concerned, especially with the bandwidth requirements the way they are. Metro Ethernet got its name from mostly being in metropolitan areas The acronym MPLS stands for Multiprotocol Label Switching The 155.52 Mbps of an OC3 Line has a payload of 148.608 Mbps an overhead of 6.912 Mbps which includes path overhead using fiber optics An OC12 can transmit data from 336 DS1/T1's /12 DS3T3's or the equivalent in capacity of OC12 = 622.08 Mbps A T1 Line/1.54 MB can transmit 24 simultaneous calls via VoIP at 64 KB using Codec G.711 or G.722 An OC3 is also known as STM-1x (Synchronous Transport Module) |
