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This speed is dictated by the bandwidth requirements for PCM-encoded telephonic voice signals: at this rate, an STS-1/OC-1 circuit can carry the bandwidth equivalent of a standard DS-3 channel, which can carry 672 64-kbit/s voice channels. [1] In SONET, the STS-3c signal is composed of three multiplexed STS-1 signals; the STS-3c may be carried ...
The three STS-1 (OC-1) streams interleave with each other so that the first column is from the first stream, the second column is from the second stream, and the third is from the third stream. Concatenated STS (OC) frames carry only one column of path overhead because they cannot be divided into finer granularity signals.
VT1.5 is a type of virtual tributary in SONET. SONET bandwidth is defined in multiples of an OC-1/STS-1, each of which can transport up to 51.84 Mbit/s. However, it is frequently desirable to address much smaller portions of bandwidth. To meet this need, sub-STS-1 facilities called Virtual Tributaries have been defined.
When a DS3 is delivered over fiber it is still an analog type trunk connection at the termination points. When delivering data over an OC3 or greater SONET is used. A DS3 transported over SONET is encapsulated in a STS-1 SONET channel. An OC-3 SONET link contains three STS-1s, and therefore may carry three DS3s.
STS-1 (Space Transportation System-1) was the first orbital spaceflight of NASA's Space Shuttle program. The first orbiter , Columbia , launched on April 12, 1981, [ 1 ] and returned on April 14, 1981, 54.5 hours later, having orbited the Earth 37 times.
1 0 0 0 0 0 0 OTU2 10 10.7 Transports an OC-192, STM-64 or wide area network (WAN) physical layer (PHY) for 10 Gigabit Ethernet (10GBASE-W) 8 4 1 0 0 0 0 0 OTU2e [4] 10.5 11.1 Transports a 10 Gigabit Ethernet local area network (LAN) PHY coming from IP/Ethernet switches and routers at full line rate (10.3 Gbit/s). This is specified in G.Sup43 ...
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Multiplies to clock for communication for SONET/SDH/ATM, 1.5×51.840 MHz (SONET STS-1 frequency). Can be generated from 19.44 MHz xtal. 78.125 Ethernet: Gigabit Ethernet, multiplies to 10 GHz MAC-side bitrate, post-serdes; 78.125 MHz = 1/132 of 10.3125 GHz, 1/128 of 10.0 GHz; often generated from 19.53125 MHz xtal 78.8 VGA