CIT 307 Online Data Communications High Speed Digital Access Module 10 Kevin Siminski, Instructor.
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Transcript of CIT 307 Online Data Communications High Speed Digital Access Module 10 Kevin Siminski, Instructor.
![Page 1: CIT 307 Online Data Communications High Speed Digital Access Module 10 Kevin Siminski, Instructor.](https://reader030.fdocuments.in/reader030/viewer/2022032414/56649eec5503460f94bfde36/html5/thumbnails/1.jpg)
CIT 307 OnlineData Communications
High Speed Digital High Speed Digital AccessAccess
Module 10Module 10Kevin Siminski, InstructorKevin Siminski, Instructor
![Page 2: CIT 307 Online Data Communications High Speed Digital Access Module 10 Kevin Siminski, Instructor.](https://reader030.fdocuments.in/reader030/viewer/2022032414/56649eec5503460f94bfde36/html5/thumbnails/2.jpg)
ADSL
ADSL is an asymmetric communication technology designed for residential
users; it is not suitable for businesses.
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Local loops
The existing local loops can handle bandwidths up to 1.1 MHz.
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ADSL
ADSL is an adaptive technology. The system uses a data rate based on the
condition of the local loop line.
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DMT
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Subdividing Bandwidth
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ADSL Modem
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DSLAM
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Cable Modems – Traditional system
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Traditional Cable
Communication in the traditional cable TV network is unidirectional.
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HFC Network
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HFC Cable
Communication in an HFC cable TV network can be bidirectional.
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Coaxial Cable bands
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Bandwidth on Coaxial
The theoretical downstream data rate is 30 Mbps..
The theoretical upstream data rate is 12 Mbps.
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Cable Modem
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CMTS
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SONET
Synchronous Optical NETworking This technology is the backbone of the
telephone network!
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Clocking in a SONET system
SONET is a synchronous TDM system controlled by a master clock.
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A SONET network
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SONET rates
STS OC Rate (Mbps) SPE (Mbps) User (Mbps)
STS-1STS-1 OC-1 51.84 50.12 49.536
STS-3STS-3 OC-3 155.52 150.336 148.608
STS-9STS-9 OC-9 466.56 451.008 445.824
STS-12STS-12 OC-12 622.08 601.344 594.432
STS-18STS-18 OC-18 933.12 902.016 891.648
STS-24STS-24 OC-24 1244.16 1202.688 1188.864
STS-36STS-36 OC-36 1866.23 1804.032 1783.296
STS-48STS-48 OC-48 2488.32 2405.376 2377.728
STS-192STS-192 OC-192 9953.28 9621.604 9510.912
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STS Multiplexing