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To: engineer who wrote (70435)	4/12/2000 11:18:00 AM
From: Boplicity	Respond to of 152472

re: <<(One side note..... the greatest terror in my neighborhood is soccer moms in giant SUVs on cellphones stuck up to their ears. More crashes around our place from this. If the insurance companies wanted to get these lowered in accident rates, they would PAY or require all SUVs to be shipped wiht a handsfree kit day one like bluetooth where the stereo only needs a $5 item and the cellphone needs a $5 item to work....Or at least offer a SUBSTANTIAL discount on handsfree kits in SUVs like they do on alarms...Just MHO)>> Buy LHSP. Thanks Engineer I hate to see a could idea get trashed before it's time. Greg

To: engineer who wrote (70435)	4/12/2000 1:00:00 PM
From: Kok Chen	Read Replies (1) \| Respond to of 152472

engineer wrote: I think that bluetooth can support a basic rate much faster than you quote. From my reading of the specs (Core Specification, Volume 1), using differential BFSK modulation, Bluetooth has a raw rate of 1 mega symbols per second. The FSK pair is then hopped at the packet rate. Hopping with a single frequency slot will thus give a basic Bluetooth device a raw thruput of 1 Mbits/sec. Somewhere else, I have seen Bluetooth quoted as 750 kilobits/sec after the packet overhead. Now, it is possible, at extra expense and more bandwidth occupancy, for a Bluetooth device to hog more than one frequency slot. For example, if the device uses 2 of the slots at any given time, you can then achieve 1.5 Mbits/sec effective transfer rates. One can think of this as having a constellation of 2 symbols, On the other side of the picture [pun intended], my Nikon 950 camera, using JPEG compression, compresses a typical image to about 750 kilo-bytes. This is not the highest quality mode for the camera, either. Further, this is a generation-old camera. The current generation cameras have higher resolutions than my relic and the number of pixels is proportional to the square of resolution! Regards, Kok Chen