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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 DS1/T1 PRI has 23 DS0 Channels T3 or DS-3 is equal to 28 T1 Lines. The capacity is 45 million bits per second or 45 Mbps. GigE stands for Gigabit Ethernet 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 Optical Carrier (OC) is multiplied for use by other OC-n standards. For illustration purposes, an OC-3 Line is 3 times the rate of OC-1 Line 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. Codec G.723.1 transmits at 5.3 Kbps and 6.3 Kbps which can be used over Dial-Up with high compression and processing power. OC-3 are called OC-3c when not being multiplexed from a single data source, the letter "c" (standing for concatenated) |
