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A traditional method for backing up an OC-12 ring is called a bi-directional ring topology. The OC12 ring is a physical fiber ring looking like an oval shaped loop. This physical topology of the bi-directional ring deploys two sets of fiber strands. A DS1/T1 can be a PRI 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 The 3 famous data rates are as follows that operate over optical fiber and twisted pair cables which are 10 Mbps-10Base-T Ethernet, 100 Mbps-Fast Ethernet and 1000 Mbps-Gigabit Ethernet. Incoming packets in an MPLS network are assigned a label by a label edge router or (LER). An Optical Carrier Level 1 or OC1 Line is also known as STS-1 (Synchronous Transport Signal) The Four OC12 Layers are the (1) Photonic Layer, (2) Section Layer, (3) Line Layer and the (4) Path Layer. Codec G.722 transmits at 48 Kbps, 56 Kbps and 64 Kbps An OC3 transmits data at a rate of 155.52 megabits per second |
