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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 Line can be an Integrated DS1/T1 and communicate both voice and data Frame Relay is basically not used anymore as far the Internet is concerned, especially with the bandwidth requirements the way they are. 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. 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 OC1 or Optical Carrier Level 1 is a SONET line and transmits data at a rate of 51.84 megabits per second with a payload of 50.112 Mbps and an overhead of 1.728 Mbps over optical fiber SPE (Synchronous Payload Envelope) is the electronic envelope that transmits the data over the OC12 Line also known as the Payload. Codec Speex transmits at 2.15 Kbps, 44 Kbps and minimizes bandwidth usage by using variable bit rate. An OC3 Line is also known as STS-3 (Synchronous Transport Signal) |
