Trasmition of 40GBase-T and 100Gbase-T over category 7A

copper cablesSteven Fratello

Need

• Copper wires are only useful for short distance transmitions

• Alien talk often disrupts the signal on a copper cable

Need

www.cisco.com/en/US/products/hw/optical/ps201...Increase in network traffic 1996-2001

Need

• The copper cable determines the distance before the signal becomes to weak and distorted to be recoverable

• This distance determines the amount of repeaters used along the wire

Knowledge base

Knowledge baseCAT 7(ISO Class F)600 MHz1.2 GHz in pairs with Siemon connector Full-motion videoTeleradiologyGovernment and manufacturing environmentsFully Shielded (S/FTP) system using non-RJ45 connectors but backwards compatible with hybrid cords.Until February 2008, the only standard (published in 2002) to support 10GBASE-T for a full 100m.

www.nexans.us/eservice/US-en_US/navigatepub_1...

Enteshari/Kavhrad 09

Tranmition at 40Gbase-T is practical at lengths up to 50 meters

Transmition at 100GBase-T can be practical at lengths up to 10 meters

Kavehrad 07

• it is possible to extend the length of category 7 copper cables from 70 meters to 100 meters (Kavehrad 07)

I. Kalet and S. Shamai• Present copper wire systems operate far

below theoretical capacity

http://www.pmi.it/file/contenuti/003853/img_01.jpg

Viterbri decoder • “1. Branch metric calculation • 2. Path metric calculation

• 3. Traceback

• Encoded stream > branch metric calculation> path metric calculation> Traceback> decoded stream

Measuring signal strength

• RSSI system (received signal strength indicator)

• The value is based on the max value of that system

http://cnx.org/content/m21600/latest/rssi_vs_dist.jpg

Purpose

• To Determine the distances which 100Gbase- T is more practical than 40Gbase-T.

Hypothesis

Alternate hypothesis- The 100Gbase over the copper cable will be more practical than the cable transporting 40Gbase in short distances

Null Hypothesis- The 40Gbase transmition over the copper cable is always more practical

Do Ability

• Very doable • Most info can be recorded on a computer • Only the copper cables are needed • Only problem is the application of the RSSI

system

Protocols

• Data is sent from one computer to another • Computer receiving the data would record

how much Giga bites is received. • The strength of the signal will be recorded

Budget

• Vendor Object Price • Nexans Category 7A copper $19.55• cable 200 meters • Science res computer

Methodology Category 7A cables

40GBase-T run through Copper cable

run through copper cable

N=10 50M N=10 100M

Internet signal sent over cable

Signal strength recorded on receiving computer

Data run through Viterbri decoder

Data statistically analyzed on spss

Bibliography • http://www.ieee802.org/3/10GBT/public/nov03/kavehrad_1_1103.pdfpgs 1-34.

2003• Researchers Push transmission Rate of copper Cables• Ultrafast Home Network Possible by Using Separate Optical Fibers • I. Kalet and S. Shamai, “On the capacity of a Twisted-Wire

Pair: Gaussian• Model”, IEEE Transactions on Communications, vol. 38, No 3,

March 1990.• http://www.ieee802.org/3/hssg/public/nov07/kavehrad_01_1107.pdf 1-21 2007• http://www.nexans.us/US/2009/DC09_paper.pdf 1-16 Ali Entashari,

Mohsenkaverad • K. Seki, et. al., Performance Evaluation of Low-Latency LDPC Code, IEEE 802.3• 10GBASE-T Study Group Interim Meeting, July 2004.