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junko.yoshida
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Re: GM selects my carrier
junko.yoshida   2/25/2014 9:28:00 PM
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@Bert, as usual, thanks for adding good insight here. I've never owned GM cars, and I did not know that. Thanks for your comments.

What you wrote in the last paragraph caught me eyes.

Oh, as an aside, GM and Mercedes, both of which have similar telematics systems, DID NOT offer to update older cars to the new cellular standard, or at least, not many of the older models. When OnStar went digital, ca. 2007, GM only offered updates to 2003 and newer cars. The rest could instead feel free to visit GM showrooms and select a new car.


Does this mean that something like a car to be "upgradable" and "future proof" as far as connectivity is concerned, they'd have to use software-defined radio? Or, it it just a plain fairy tale for those carmakers to think that they are "future-proofing" their cars, I wonder.

Bert22306
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Re: GM selects my carrier
Bert22306   2/25/2014 7:14:41 PM
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This is nothing new, in fact. I have OnStar in my GM car now. It uses the Verizon 3G network. Although initially we had a combined Verizon plan that included OnStar and our cellphones, later they split out the OnStar into a separate monthly bill. So, no problem if you don't have a Verizon plan!

(Parenthetically, the original Kindle is the same. It uses AT&T wireless. Doesn't have to be bundled with any other plan.)

The original OnStar used the analog AMPS standard. And yes, from the start, these ALWAYS had external antennas, for better reception. So I see this as a natural progression. AMPS to 3G (since analog cellular was shut off entirely by 2008), and one would expect OnStar to migrate to 4G and then 5G, each time selecting whatever cellular carrier that best met their needs.

Future proof with 4G? Kind of makes me laugh.

The idea of offering an in-car WiFi hotspot is sort of cool. Could be done with 3G too, I suppose.

Oh, as an aside, GM and Mercedes, both of which have similar telematics systems, DID NOT offer to update older cars to the new cellular standard, or at least, not many of the older models. When OnStar went digital, ca. 2007, GM only offered updates to 2003 and newer cars. The rest could instead feel free to visit GM showrooms and select a new car.

junko.yoshida
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Re: GM selects my carrier
junko.yoshida   2/25/2014 5:30:51 PM
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I agree. There are a lot of details that need to be worked out, I think. First, who pays the LTE subscription fee? Does it come with OnStar service?  And how much flexibility will carriers offer consumers? Will they allow consumers to bundle this with their existing data plan? And obviously, if drivers are not subscribed to AT&T, then, what happens?

tpfj
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GM selects my carrier
tpfj   2/25/2014 2:45:36 PM
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So GM selects my future carrier. No thanks, I'll pass on GM products. There is no reason to lock to a carrier except to gouge.

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As data rates begin to move beyond 25 Gbps channels, new problems arise. Getting to 50 Gbps channels might not be possible with the traditional NRZ (2-level) signaling. PAM4 lets data rates double with only a small increase in channel bandwidth by sending two bits per symbol. But, it brings new measurement and analysis problems. Signal integrity sage Ransom Stephens will explain how PAM4 differs from NRZ and what to expect in design, measurement, and signal analysis.

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