| Thoughts and links 2005-01-13 21:26:40 ET |
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http://en.wikipedia.org/wiki/General_Packet_Radio_Service
Won't it be interesting to use your computer as a cell phone? Or maybe use a PDA as a cell phone? I mean you use cell phones that are pdas but I mean a DIY one.
http://www.ifip.or.at/con2000/icct2000/icct176.pdf
http://en.wikipedia.org/wiki/IS-2000
"IS-2000 is the second generation of CDMA digital cellular, an extension of IS-95. It is also known as CDMA2000.
The main differences between IS-95 and IS-2000 signalling are: the use of a pilot signal on the IS-2000 reverse link to permit the use of coherent modulation, and 64 more traffic channels on the forward link that are orthogonal to the original set. Some changes were also made to the link layer to accommodate the greater use of data services - IS-2000 has media and link access control protocols and QoS control. In IS-95, none of these were present, and the link layer basically consisted of a "Best effort delivery" RLP - this arrangement is still used for voice.
In the United States, Verizon Wireless and Sprint PCS use IS-2000."
http://en.wikipedia.org/wiki/CDMA2000
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| From the cell phone link 2005-01-13 20:41:56 ET |
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Technically, cellular systems in the United States operate in the 824-MHz to 894-MHz frequency bands; PCS operates in the 1850-MHz to 1990-MHz bands. And while it is based on TDMA, PCS has 200-kHz channel spacing and eight time slots instead of the typical 30-kHz channel spacing and three time slots found in digital cellular.
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| Slow Throughput 2005-01-10 19:47:07 ET |
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So I call Verizon about my DSL being slow and discover that my line is capped at 760k instead of the 3megabits!!!
Hmm... they had me tracert red.com. Hmm.. What's red.com?
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