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Optical Carrier Level 12 (OC-12) circuits work as an integral part of fiber optic backbones for large networks with extremely big IP bandwidth needs for VoIP or Voice over IP, Video Conferencing and varying Internet applications. A DS1/T1 Line can also be Bonded DS1/T1 Line OC-1 or also known as the term SONET. An OC1 uses ATM switches, as OC-X does and runs at 51 million bits per second or 51 Mbps. OC-X uses optical fiber Metro Ethernet got its name from mostly being in metropolitan areas The LSR of the MPLS Network strips off the existing label at each hop and applies a new label that dictates how the next hop will forward the packet. 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 When discussing the STS-12 optical carrier frame, the following acronyms apply: SOH (Section Overhead), SPE (Synchronous Payload Envelope), LOH (Line Overhead) and POH (Path Overhead). G.729 transmits at 8 Kbps and has superior bandwidth utilization which requires a license and is error tolerant. The 155.52 Mbps has a payload of 148.608 Mbps an overhead of 6.912 Mbps which includes path overhead using fiber optics |
