[conspire] (forw) Re: [ILUG] Android gone Free
ruben at mrbrklyn.com
Fri Nov 14 07:29:45 PST 2008
Rick Moen wrote:
> Quoting Daniel Gimpelevich (daniel at gimpelevich.san-francisco.ca.us):
>> From what I heard before T-Mo picked up Android, it was already like
>> that. This, if anything, ensures that OpenMoko is NOT dead in the water.
> Interesting points.
> I rather liked this response to the original poster, though, which
> suggests a different approach:
> From: Michael Watterson <watty at eircom.net>
> To: john.looney at gmail.com
> Cc: Irish Linux Users Group <ilug at linux.ie>,
> David Dolphin <David.Dolphin at skynet.ie>
> Subject: Re: [ILUG] Android gone Free
> Android is not about a Linux phone
> It's not about openess
> It's not about installing your own (I've built a handset with VOIP, it
> just takes HW that is documented).
> It is all about having a CLOSED platform, a google alternative to Java.
> Android is only incidentally Linux. It could be WinMo, Symbian etc.. the
> important bit got Google and what the apps run on is the custom Google
> version of Java.
> If you want an Open phone build your own or buy OpenMoko. A Symbian
> phone is more open than Android.
> The simplest solution HW & SW wise is a VOIP handset with an
> EDGE/3G/HSDPA modem module (some will even let you do ordinary voice
> calls and SMS via analogue I/O and Modem commands). Real phones have a
> baseband CPU and don't use a Modem. You need a phone stack for them for
> GSM, GPRS, EDGE, 3G and HSDPA. This is a lot more than the "Radio
> Drivers" which are simple. If you examine phone you can usually see
> what RF chips are used and setting the TX and RX frequency , power,
> TX/RX is fairly easy for your own custom Radio System. Doing it
> compliant with GSM/3G is NOT a "Radio Driver" issue, but a phone
> protocol stack issue for the baseband or DSP/Baseband CPU.
> Some phones have SDR, DSP chips to implement IQ based demodulation and
> Modulation. These chips may include a CPU or use a separate CPU for the
> phone protocol stack.
> Years ago I did a lot of ISDN and also analogue trunk protocol
> signalling. All this stuff (3G/GSM) is documented. You could in theory
> write your own stack. However if you don't mind paying an extra $200,
> buy a micro sized Modem Module that is essentially a PCB version of
> functionality of E220 USB modem etc or Sierra 850 and a general purpose
> ARM + LCD + Touch screen (plenty available) and add Linux. No phone
> stack needed. No RF drivers needed.
One question. What do you connect to?
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