这个话题虽然在布线界讨论了很多年，但仍然是争论不休的问题。我们在这里加入在论坛中有价值的发言，公布给大家，并推荐 Henri 博士简明而精彩的发言。
have a big dilemma about choosing between UTP or FTP wiring.
Considering the site is a business premises with about 15 km total length
the dilemma is even bigger.
I am aware of the disadvantages of FTP (more expensive, needs more space,
difficult to connect) but anyway I need more arguments for comparing FTP to
Can someone help me?
Reply to Igor Hostnik from Ernst Lopes Cardozo
Well, you ask a broad question, you get a spectrum of answers! This is
How long will the cabling be used? If you plan to leave the building in
What will the cabling be used for? For data, I reckon that Ethernet at
While fiber cabling by itself may have comparable price, in practice I
Shielding (STP or FTP) can help, but has its own risks and expense. My
Whish you success!
Ernst Lopes Cardozo"
cables have better immunity to EMI...if you have any EMI source nearby,
The best thing to do in this case is using fiber to the desk.
topic can become quite political and emotional.
No doubt, assuming you have installed all ScTP cabling correctly and made
There is not a really good field test to certify the (RF) quality of the
You really have to worry about power line ground loops with shielded
Assuming quality shields, the potential for alien crosstalk is reduced
Good UTP cable installations can and will generally meet EMI requirements
If you really worry about EMI and crosstalk between cables, fiber is of
summary: you will achieve better EMI performance with shielded cabling.
UTP cabling does work as well and does not have to radiate, and avoids
If you are really worried about EMI, fiber is the answer.
course there are cost considerations and economics and you have to look
So, the true answer is "it depends" on your situation, and what you want to do!
Hope this is helpful.
("Henri" or "Riekus") Koeman
make some excellent points. One that is not mentioned is the length of
can understand people's feeling on going for the "ultimate"
the rapid change of technology, I am strongly inclined to put
am not as concerned as you are on the 100 m limitation. From a
say, you have to worry about 100 m is potentially misunderstood (by me).
really is important are propagation delay, delay skew and attenuation.
("Henri" or "Riekus") Koeman
I'm glad to see that Henriecus is still with us.
made an assumption about FTP that may not be valid. What is FTP,
Henri is with us - as strong as ever!
in regard to the term FTP: This is the most widely accepted name for a
Thanks for the clarification.
the F-word is "Foiled" and not "Fiber", as in Foiled
Twisted Pair, while
we dropped the name "ScTP" in favor of "FTP" now?
If so, this tracks
course, there is no such thing as "fiber twisted pair", even
as I might, these twist-on wirenuts just don't seem to help with
are cables that include several unshielded pairs or quads.
every body is free to invent new acronyms to better defined a new
danger of acronyms is that they are only understood bt those who invented
To illustrate my feeling, I submit you this requirement:
the LPS of the LPZ related to ITE includes a CBN with SPD, FTP ,
course you can find better examples already used by Ciceron during the