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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 PRI DS1/T1 uses it's 24th DS0 channel for signaling OC-12 transmits 600 million bits per second or 600 Mbps. FastE is short for Fast 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. An Optical Carrier Level 1 or OC1 Line is also known as STS-1 (Synchronous Transport Signal) 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 Speex transmits at 2.15 Kbps, 44 Kbps and minimizes bandwidth usage by using variable bit rate. OC-3 are called OC-3c when not being multiplexed from a single data source, the letter "c" (standing for concatenated) |