From: David Arnold <davida@pobox.com>
To: Fans of the OS Plan 9 from Bell Labs <9fans@9fans.net>
Subject: Re: [9fans] Android / G1
Date: Mon, 16 Feb 2009 15:45:39 -0500 [thread overview]
Message-ID: <A0987637-1EA9-425C-8674-4B8B8824C18F@pobox.com> (raw)
In-Reply-To: <72c237151fdc2c4fbccb4067b79c0e84@9netics.com>
On 16/02/2009, at 2:26 PM, Skip Tavakkolian wrote:
> do mobile carriers allow (in a legal sense) unblessed device/OS on
> their networks?
In the Linux-based phones that I'm familiar with, the GSM protocol is
implemented as a separate module. It uses a serial interface (and an
extended AT command set) to communicate with the application
processor. This 'baseband' module has its own firmware, and the
source code for that is typically not available except under NDA and
license. Bluetooth and WiFi modules are similar.
This neatly avoids the issue of unblessed devices: the module
manufacturer does the certification against the standard, and the
serial command set doesn't allow applications to override anything
that could cause bad interactions with the network.
d
next prev parent reply other threads:[~2009-02-16 20:45 UTC|newest]
Thread overview: 13+ messages / expand[flat|nested] mbox.gz Atom feed top
2009-02-16 12:21 matt
2009-02-16 12:42 ` Anselm R Garbe
2009-02-16 13:33 ` Wes Kussmaul
2009-02-16 17:24 ` Juan M. Mendez
2009-02-16 17:46 ` hiro
2009-02-16 19:26 ` Skip Tavakkolian
2009-02-16 19:05 ` ron minnich
2009-02-16 19:36 ` hiro
2009-02-16 20:45 ` Skip Tavakkolian
2009-02-16 20:16 ` Juan M. Mendez
2009-02-16 20:45 ` David Arnold [this message]
2009-02-16 21:51 ` Skip Tavakkolian
2009-02-17 4:52 ` Anthony Sorace
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