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5. Switched Ethernet technology. Fast Ethernet 100 Mbit/s
Fast Ethernet on copper media has never been specified on coaxial cable, and therefore only exists on shielded twisted pairs; it's called 100BaseT. This requires the use of Category 5 cables that support signal transmission up to 100 MHz.
5.1 Full-duplex links and collision disabling
By imposing a minimum packet size of 64 bytes (to enable collision detection in all circumstances), the Ethernet standard is very penalizing for interactive traffic, where information does not exceed a dozen characters per packet. If the station has less than 64 bytes to transmit, it must complete the data with zeros.
Since the first version of Ethernet, there have been major advances in operating speed, with speeds of 100 Mbit/s (Fast Ethernet) and even...
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Switched Ethernet technology. Fast Ethernet 100 Mbit/s
Ethernet as a field network: PROFINET open standard
Bibliography
Standardization
- Information Technology – Telecommunication & Information Exchange Between Systems – LAN/MAN – Specific Requirements – Part 3: Carrieir Sense Multiple Access with Collision Detection (CSMA/CD) Access Method and Physical Layer Specifications - IEEE 802.3 - 2002
- Standards for Local and Metropolitan Area Networks : Virtual Bridged Local Area Networks - IEEE 802.1Q - 2003
- Information Technology – Generic wiring...
Manufacturers, constructors
(non-exhaustive list)
Siemens http://www.siemens.com
SEW Eurodrive http://www.sew-eurodrive.com
Rexroth Bosch Group http://www.boschrexroth.com
...Organizations
PROFIBUS http://www.profibus.com
Institute of Electrical and Electronics Engineers (IEEE) http://www.ieee.org
Interbus http://www.interbusclub.com
...
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