From: Angstrom@yabbs
To: Justin@yabbs
Subject: re: boxes
Date: Sun Feb 20 20:59:15 1994

...Basically the Blue Box emits a 2600hz tone (hence the zine 2600)
causing the line to go dead and giving you the power of an operator, 
though nowadays telco monitors for that tone. There have been suggestions 
of mixing pink noise with the original signal 3000, but it does not work. 
The only way you can use a blue box today is use it where a line man has 
just installed a new line or tested one cause that tone is still used for 
testing...and that number can use a 2600 signal for about a month before 
it is taken off the telco list. Beige boing is using someone elses line 
through canning...and there is not musch risk as long as you only use that 
line once or twice and the only person who gets screwed is "Ma Bell" as 
the guy whose line you were using only has to pay $50 of the bill you rang 
up...well hope this helps...