1. What is IEEE 1394?
IEEE 1394 is also known as FireWire or I. LINK and was developed
by Apple computer. It is a high speed interface allowing devices
which require fast transmission speeds, such as videos, to connect
to the PC. The IEEE 1394 connector is smaller than a USB plug. IEEE-1394
is fully plug and play (PnP) and a number of devices can be connected
at the same time.
2. What is the maximum cable length
between devices and overall?
Simple answer: 4.5m and 72m. Complex answer: there are three defined
data rates being 98.304, 196.608 and 393.216Mbits/sec called S100,
S200 and S400 (S800 and S1200 in planning). Only S100 & S200
is currently available and if you limit maximum speed to S200 then
internode length can go up to 14m. However, if the device(s) connected
draw power then the total volts dropped in this distance could be
a limiting factor.
3. What is the maximum number of
devices you can have on one daisy chain?
Simple answer: 63. Complex answer: 63 in one subnet; 1.023 subnets
can be connected to give over 64k devices! Any device can send and
receive data to any other connected device.
4. Does the last device need any
kind of termination or is that automatic?
No, all devices in a Firewire chain are automatic and hot pluggable.
5. What is the maximum speed of FireWire?
6. Are there any audio devices using
Not generally available; loudspeakers & DVD likely to happen
7. What other devices have or will
Camcorders, cable, satellite, direct to home video and HDTV set
top boxes, home theatre, home networks, video games, MiniDisc keyboard/synthesizers/MIDI,
DAT, professional video equipment PC disks, PC networking, printers,
8. Can you mix device types on the
Yes, you can mix devices in a single chain.
9. What is the difference between
4 wire and 6 wire firewire connectors?
Four (4)-wire = two lots of individually shielded twisted pairs
crossed over (like a null modem cable). 6-wire is the same plus
two more for DC power.