Beza Base-T & Base-TX

rikiruj

Ada sapa2 disini tau apa bezanya Ethernet cable base-T & base-Tx.. saya dah google seharian tapi tak dapat jawapan yang convincing.  Apa beza utp cable 1000 base-T & 1000 base-Tx?

Thanks

Cretin.Penguin

This may offer some help, or maybe too much?     T = Twisted pair cable, TX = Shielded Twisted pair cable; my understanding anyway...

http://www.ieee802.org/3/az/public/nov07/barnette_1_1107.pdf

http://webopedia.com/quick_ref/EthernetDesignations.asp

[ Last edited by  Cretin.Penguin at 19-2-2008 03:37 PM ]

rikiruj

TQ Cretin.. my understanding based on my google research before your reply was base-T have shorter distance compared to base-tx but there's no explanation on why & how...

since it's basically unshielded (base-t) and shielded (base-tx), it is obvious that shielded cable are less susceptible to electromagnetic noise hence the longer distance.. am i right?..

Thanks again

Cretin.Penguin

Got it!....  It's actually a different design, supposed to replace Base-T but it was a failure:

The Telecommunications Industry Association (TIA) created and promoted a version of 1000BASE-T that was simpler to implement, calling it 1000BASE-TX (TIA/EIA-854). The simplified design would, in theory, have reduced the cost of the required electronics by only using two pairs in each direction. However, the two-pair solution required Category 6 cable and has been a commercial failure, likely due to the rapidly falling cost of 1000BASE-T products combined with the Category 6 cable requirement. Many 1000BASE-T products are advertised as 1000BASE-TX due to lack of knowledge that 1000BASE-TX is actually a different standard.

rikiruj

yeah.. after re-googling I also found out about that..

IEEE 1000Base-T = transmit/receive 250 mbit/s on 4 pairs (full duplex)
TIA 1000Base-TX = transmit 500 mbit/s on 2 pairs and receive 500 mbit/s on 2 pairs (half duplex)

1000Base-T works on both cat-5e & cat 6 cabling while 1000Base-TX can only work on cat 6 cabling..

The question now.. since I'm not familiar with the costing..
1) What are the costs difference (lebih kurangla) of cat-5e, cat-6 and fiber for in-building (1) backbone and (2) end user connection
2) Is 1000base-tx really dead?

Cretin.Penguin

It won't be a matter of price alone, but what U wanna do with it...  If it's just non-critical servers where speed & scalability are never an issue, you might as well get away with Cat5e....

Cat5e = ~RM350;  Cat6= ~RM550 per box; You do the math, take into consideration that Cat6 accessories are far more expensive....  To jump from Cat6 to Fiber maybe you can add extra 30%-40%.

So, the question will be more likely "Is it worth it? & Do you really need the extras?"

So, what is it for anyway? ...If you don't mind me asking.  

LostSoul

less 100 mtrs.. use cat.5e would be enough.. more than 100, better use fiber.. but be ready to pay higher price then.

Cretin.Penguin

Oh yeah.... Not sure if 1000 Base-TX is already dead, but most probably "nyawa2 ikan"...     Take the war for the stake to be the standard of DVD writers & storage....  Nobody wins, just that we're the loser....  Even if the commonsense tells everybody to cut their loses & put all the R&D into a single format/standard, yet economically they cut their loses by delaying & ley the consumers fight & pay needlessly for the technology that they don't really need.