Question

What are some of the differences between FireWire 400 and FireWire 800?

What is the maximum cable length of a FireWire 400 cable? A FireWire 800 cable?

In what ways does IEEE 1394 differ from USB?

Answer 1

1)some of the differences between firewire400 and firewire800?

most common types of Firewire connectors are Firewire 400 and Firewire 800.

• FireWire 400, is a flatter connector with one rounded side, and the faster 800 version resembles a fat USB connector.
• The difference between these two is simply the speed at which they are able to transfer data.
• The numbers are referring to Mbps, which means that a Firewire 400 can transfer at the approximate rate of 400 Mbps, and the Firewire 800 connector is twice as fast as this.
• Firewire 800 is compatible with peripherals of a Firewire 400, which means that you can connect those peripherals to a port and use your Firewire 800 on a port meant for Firewire 400.
• advancements include increased cabling distances and a newly enhanced arbitration architecture. Utilizing cables constructed of professional-grade glass optical fiber, when both devices are connected via a FireWire 800 hub, FireWire 800 can burst data across 100 meters of cable.
• fire wire 800 reduces signal distortion, and improves the arbitration time.

2)what is the maximum length of fire wire 400 cable ?a firewire 800 cable?

• when the first IEEE-1394/1395 specification was issued, at the time limiting the maximum cable length to 4.5 meters. Therefore we can now secure safe operation of our Firewire cable lengths up to 10 meters!
• The maximum cable length for firewire 400Mbps cable is 4.5-meters
• The Firewire specification calls for 10 meter (32ft) cables that may be used in conjunction with a repeater when it is necessary to extend FireWire cables over long distances.
• Unibrain 9-pin to 9-pin FireWire 800 Cable - 10m/33ft
• Exceeding the 4.5 meter cable length
  Unibrain firewire cables do not only achieve a very controlled 110 Ohm impedance but also provide high performance for skew, attenuation and crosstalk.

3)In what ways does IEEE 1394 differ from USB?

• The main difference between the two is that FireWire is made to handle more data than USB, particularly audio and visual information.
• firewire capacity 400–3200 Mbit/s (50-400 MB/s) and USB capacity 1.5, 12, or 480 Mbit/s (0.2, 1.5 or 60 MByte/s)
• speeds are FireWire 800 = 800 Mbit/s and faster for a high number of small data but slower while writing a small amount of huge files USB 3.0 = 5 Gbit/s.
• number of devices upto 63 in firewire and USB consists 127 per host controller
• The USB network topology is a hub, while FireWire network topology is a daisy chain.
• FireWire costs a bit more than USB.

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