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Optical Carrier Level 12 or the acronym OC12 is most often made up of what is called a (Synchronous Optical Network) or SONET ring to maintain it's integrity during high speed bandwidth transmissions. A Business DS1/T1 Line is more reliable than DSL OC-12 transmits 600 million bits per second or 600 Mbps. In the 1980s speeds of up to 10 Mbps Ethernet Version 1.0 specification was developed. 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. 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 STS-12 is the abridged term standing for Synchronous Transport Signal level 12. SONET OC and STS transmit the same electrical equivalent, hence the SONET level OC-12 is the same as STS-12. VoIP is the acronym for Voice Over the Internet Protocol OC-3 are called OC-3c when not being multiplexed from a single data source, the letter "c" (standing for concatenated) |
