Open GSM modem - Revision history

Glenn: Open GSM Radio moved to Open GSM modem

2012-02-12T12:53:21Z

Open GSM Radio moved to Open GSM modem

Glenn: +link

2012-02-12T06:32:59Z

+link

Kempelen: Category changes: -Openmoko, -Technical, -Documentation, +GSM

2008-09-07T10:52:54Z

Category changes: -Openmoko, -Technical, -Documentation, +GSM

Glenn: catchg

2008-07-06T14:55:16Z

catchg

Coolcat at 04:14, 14 March 2008

2008-03-14T04:14:18Z

Speedevil: reorg

2007-10-15T14:51:57Z

reorg

Glenn: +Category:Information

2007-07-26T15:41:23Z

+Category:Information

Speedevil: rough cut of explanation as to why open source GSM can't happen.

2007-07-25T18:39:09Z

rough cut of explanation as to why open source GSM can't happen.

New page

[http://en.wikipedia.org/wiki/GSM GSM] is the mobile standard supported by the Neo1973.

The modem in the phone is not open source, it is talked to over a serial interface.

A number of applications could be made possible if the source was available to the modem.
These include:
*Moving some policy inside the modem, so that it could take a list of numbers to wake the CPU on, and a list of numbers to ignore. To reduce battery use.
*Access to packet by packet signal strengths and timings to aid with positioning.

Unfortunately.

There is a fundamental problem.

GSM works so well because the towers are carefully planned.
They are designed so they don't interfere with each other.

If nobody does anything bad, this all 'just works'.

However, if someone wrote a 'free local data' transmitter, which simply used the modem to send direct to another modem, it would jam a GSM channel.
If you are not much further away from the tower than people making phone-calls, then your signal strength will be strong enough to knock 8-16 phone users off the channel.

These users may simply be able to redial, and they will get through.

On the other hand, it would only take a few users using this sort of software to completely prevent anyone from making phone calls in the area unless they were significantly closer to the tower than the users of this software.

This can be tens, or hundreds of square kilometers in rural areas.

Some of these calls will be emergency calls.

In addition http://www.cellular-news.com/story/8970.php and http://www.google.co.uk/url?sa=t&ct=res&cd=7&url=http%3A%2F%2Fwww.parliament.uk%2Fcommons%2Flib%2Fresearch%2Frp2002%2Frp02-047.pdf&ei=RpenRou1GZSoxAGe9fDQBw&usg=AFQjCNF7EpgFaUwd76UJnDYE2k8aOPUpqg&sig2=xfCyHIkKrhw4y7XyDcyv_g are examples of legislation, which makes sale of equipment able to change IMEI illegal. This would make it illegal to sell phones of this sort once the first one is misused.

← Older revision		Revision as of 06:32, 12 February 2012
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	In addition http://www.cellular-news.com/story/8970.php and http://www.google.co.uk/url?sa=t&ct=res&cd=7&url=http%3A%2F%2Fwww.parliament.uk%2Fcommons%2Flib%2Fresearch%2Frp2002%2Frp02-047.pdf&ei=RpenRou1GZSoxAGe9fDQBw&usg=AFQjCNF7EpgFaUwd76UJnDYE2k8aOPUpqg&sig2=xfCyHIkKrhw4y7XyDcyv_g are examples of legislation, which makes sale of equipment able to change IMEI illegal. This would make it illegal to sell phones of this sort once the first one is misused.		In addition http://www.cellular-news.com/story/8970.php and http://www.google.co.uk/url?sa=t&ct=res&cd=7&url=http%3A%2F%2Fwww.parliament.uk%2Fcommons%2Flib%2Fresearch%2Frp2002%2Frp02-047.pdf&ei=RpenRou1GZSoxAGe9fDQBw&usg=AFQjCNF7EpgFaUwd76UJnDYE2k8aOPUpqg&sig2=xfCyHIkKrhw4y7XyDcyv_g are examples of legislation, which makes sale of equipment able to change IMEI illegal. This would make it illegal to sell phones of this sort once the first one is misused.
		+
		+	==See also==
		+	* [[Osmocom on TI Calypso]]

	[[Category:GSM]]		[[Category:GSM]]

@@ Line 32: / Line 32: @@
 In addition http://www.cellular-news.com/story/8970.php and http://www.google.co.uk/url?sa=t&ct=res&cd=7&url=http%3A%2F%2Fwww.parliament.uk%2Fcommons%2Flib%2Fresearch%2Frp2002%2Frp02-047.pdf&ei=RpenRou1GZSoxAGe9fDQBw&usg=AFQjCNF7EpgFaUwd76UJnDYE2k8aOPUpqg&sig2=xfCyHIkKrhw4y7XyDcyv_g are examples of legislation, which makes sale of equipment able to change IMEI illegal. This would make it illegal to sell phones of this sort once the first one is misused.
-[[Category:Technical]]
+[[Category:GSM]]
-[[Category:Openmoko]]
-[[Category:Documentation]]

@@ Line 31: / Line 31: @@
 In addition http://www.cellular-news.com/story/8970.php and http://www.google.co.uk/url?sa=t&ct=res&cd=7&url=http%3A%2F%2Fwww.parliament.uk%2Fcommons%2Flib%2Fresearch%2Frp2002%2Frp02-047.pdf&ei=RpenRou1GZSoxAGe9fDQBw&usg=AFQjCNF7EpgFaUwd76UJnDYE2k8aOPUpqg&sig2=xfCyHIkKrhw4y7XyDcyv_g are examples of legislation, which makes sale of equipment able to change IMEI illegal. This would make it illegal to sell phones of this sort once the first one is misused.
-[[Category:Technical  ]]
-[[Category:Software]]
+[[Category:Technical]]
 [[Category:Documentation]]

@@ Line 31: / Line 31: @@
 In addition http://www.cellular-news.com/story/8970.php and http://www.google.co.uk/url?sa=t&ct=res&cd=7&url=http%3A%2F%2Fwww.parliament.uk%2Fcommons%2Flib%2Fresearch%2Frp2002%2Frp02-047.pdf&ei=RpenRou1GZSoxAGe9fDQBw&usg=AFQjCNF7EpgFaUwd76UJnDYE2k8aOPUpqg&sig2=xfCyHIkKrhw4y7XyDcyv_g are examples of legislation, which makes sale of equipment able to change IMEI illegal. This would make it illegal to sell phones of this sort once the first one is misused.
+[[Category:Technical  ]]
-[[Category:Information]]
+[[Category:Software]]
+[[Category:Documentation]]
-[[Category:Reorg:MiscTechnical]]

← Older revision		Revision as of 14:51, 15 October 2007
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	[[Category:Information]]		[[Category:Information]]
		+
		+	[[Category:Reorg:MiscTechnical]]

← Older revision		Revision as of 15:41, 26 July 2007
Line 31:		Line 31:

	In addition http://www.cellular-news.com/story/8970.php and http://www.google.co.uk/url?sa=t&ct=res&cd=7&url=http%3A%2F%2Fwww.parliament.uk%2Fcommons%2Flib%2Fresearch%2Frp2002%2Frp02-047.pdf&ei=RpenRou1GZSoxAGe9fDQBw&usg=AFQjCNF7EpgFaUwd76UJnDYE2k8aOPUpqg&sig2=xfCyHIkKrhw4y7XyDcyv_g are examples of legislation, which makes sale of equipment able to change IMEI illegal. This would make it illegal to sell phones of this sort once the first one is misused.		In addition http://www.cellular-news.com/story/8970.php and http://www.google.co.uk/url?sa=t&ct=res&cd=7&url=http%3A%2F%2Fwww.parliament.uk%2Fcommons%2Flib%2Fresearch%2Frp2002%2Frp02-047.pdf&ei=RpenRou1GZSoxAGe9fDQBw&usg=AFQjCNF7EpgFaUwd76UJnDYE2k8aOPUpqg&sig2=xfCyHIkKrhw4y7XyDcyv_g are examples of legislation, which makes sale of equipment able to change IMEI illegal. This would make it illegal to sell phones of this sort once the first one is misused.
		+
		+	[[Category:Information]]