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DRNewcomb · 01-09-2007, 12:32

Interesting and well described. I don't know if I can add any value to the discussion.

1. Don't GSM 1800 & 1900 share the same set of channel numbers? So there would be a channel 720 on 1800 and a 720 on 1900. Is it possible that the channel you were monitoring was really on 1900?

2. There's a lot of electronics manufacturing in the SF Bay area. You might have picked up something being tested.

3. I've picked up GSM signals hundreds of km from the nearest site but that was over water.

4. Do I understand correctly that you were actually able to use the Orange signal to make a call?

	(#2)
DRNewcomb (Offline) Senior Member Prepaid Professionist Posts: 1,465 Join Date: 27 Feb 2004 Location: Mississippi, USA Country:	01-09-2007, 12:32 Interesting and well described. I don't know if I can add any value to the discussion. 1. Don't GSM 1800 & 1900 share the same set of channel numbers? So there would be a channel 720 on 1800 and a 720 on 1900. Is it possible that the channel you were monitoring was really on 1900? 2. There's a lot of electronics manufacturing in the SF Bay area. You might have picked up something being tested. 3. I've picked up GSM signals hundreds of km from the nearest site but that was over water. 4. Do I understand correctly that you were actually able to use the Orange signal to make a call?