[Asterisk-Users] Fwd: [ISN] Voice Over IP Can Be Vulnerable To Hackers, Too

[Steve Underwood]

tpanton at attglobal.net wrote:

>Folks seem to have forgotten that
>the original hackers were hacking
>"stable and secure" traditional PBXs 
>with captain crunch whistles!
>
>Mitnik ran wild through PBX's and mobille networks.
>
>Let's work to set up secure VOIP, but 
>don't let anyone kid you about the golden days when telephones were secure!
>
>
>(for extra points, why's the hacker mag called 2600?)
>
>
>
>tmpm <tmpm at softhome.net> wrote:
>__________
>  
>
>>Hope this isn't too far OT, but its relevant to us. From isn.attrition.org
>>    
>>
As others have said, 2600Hz is a widely used signalling frequency. 
Before ISDN and SS7 a large amount of telephony signalling consisted 
basically of beeping at 2600Hz in America, or 2280Hz in many other 
countries. If the filters in the network were inadequate (they usually 
were) you could send strong signalling tones yourself, get through the 
filters, and have your tone detected by the far end.

Regards,
Steve