Tip of the Week – 06Mar 2014

Tip of the Week: Are you offering GigE Computer Connectivity?

Are you offering or planning to offer 1GigE or 10 GigE computer connections to your customers? You may be surprised to hear that many consumer computers cannot achieve these data rates even with GigE NIC cards installed. A GigE connection theoretically should provide 125 MB/s data transfer rate under ideal conditions. But computers have a number of limiting factors including: Hard disk read/write speed which varies greatly but typically 70 MB/s to 100 MB/s (560mbps to 800 mbps) for newer computers. If you need to speed things up, replace the hard disk with a faster solid state drive (SSD) or DDR2 RAM drive. Bus Drive transfer speed. Serial ATA bus varies depending on the version from 150 MB/s to over 600 MB/s. Typically need a bus speed at least 3x faster than the interface speed (>375 MB/s) since the information on the bus is transferred 3 times between computer components when it is received. PCI expansion bus interface has a speed of 133 MB/s (running at 33MHz, 32 bit) but this is shared amongst many other computer components. So the actual connection bus transfer speed would be much slower. Upgrading to a PCI Express bus with a speed of 250 MB/s may solve this problem. For Ethernet and TCP/IP protocol actual data throughput rate is about 6% less due to protocol overhead. Although you can offer the GigE speeds, many customers will not be able to fully utilize it. Pertinent Products/Services: Looking for the right optical transceivers for your network? Gives me a call at 1.888.250.1562×4 or email bchomycz@TelecomEngineering.com We carry a variety of 100 Mbps to 100 Gbps transceivers and transponders including:
  • 1310/1550, DWDM, CWDM
  • XFP, SFP, SFP+, QSFP+, GBIC, CFP, Zenpak
  • Channel tunable DWDM XFP and SFP
  • OTN FEC G.709 transceivers
  • Long reach 10G transceivers with budgets of 28dB, 1G up to 37dB
  • Compatible with most manufacturers equipment guaranteed.
To view our products and services, surf to http://www.TelecomEngineering.com/products.htm To learn more about this topic and other fiber optic network topics, refer to my following books (publisher McGraw-Hill): “Planning Fiber Optic Networks”, ISBN 0-07-1499199 available from Amazon.com. Table of contents can be seen here: http://www.TelecomEngineering.com/products/resources/planningfibernetworks.htm.