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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 Line has 24 DS0 Channels 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 Packets are forwarded along a Label Switch Path or (LSP), where each label switch router (LSR) prioritizes each label whether it be Data, Video, Voice, etc. solely based on the contents of the label. An OC1 or Optical Carrier Level 1 is a SONET line and transmits data at a rate of 51.84 megabits per second with a payload of 50.112 Mbps and an overhead of 1.728 Mbps over optical fiber The Four OC12 Layers are the (1) Photonic Layer, (2) Section Layer, (3) Line Layer and the (4) Path Layer. G.729 transmits at 8 Kbps and has superior bandwidth utilization which requires a license and is error tolerant. An OC3 is also known as STM-1x (Synchronous Transport Module) |
