Physical Layer
The original physical layer specified was 100Base-X Fast Ethernet (IEEE 802.3). Since the end of 2006, Ethernet Powerlink with Gigabit Ethernet supported a transmission rate ten times higher (1,000 Mbit/s) using somewhat better cable (Cat6). Higher speeds are possible in theory since with standard modules and FPGAs. Repeating hubs instead of switches within the Real-time domain is recommended to minimise delay and jitter. Ethernet Powerlink uses IAONA's Industrial Ethernet Planning and Installation Guide for clean cabling of industrial networks and both industrial Ethernet connectors 8P8C (commonly known as RJ45) and M1 are accepted.
Read more about this topic: Ethernet Powerlink
Famous quotes containing the words physical and/or layer:
“The real pleasure of being Mick Jagger was in having everything but being tempted by nothing ... a smouldering ill will which silk clothes, fine food, wine, women, and every conceivable physical pampering somehow aggravated ... a drained and languorous, exquisitely photogenic ennui.”
—Anonymous “Chronicler.” Quoted in Philip Norman, The Life and Good Times of the Rolling Stones (1989)
“A revolution is not the overturning of a cart, a reshuffling in the cards of state. It is a process, a swelling, a new growth in the race. If it is real, not simply a trauma, it is another ring in the tree of history, layer upon layer of invisible tissue composing the evidence of a circle.”
—Kate Millett (b. 1934)