[AMRadio] Numbers Stations - NPRs slant

Schichler, Don don.schichler at PaeTec.com
Mon Nov 15 12:28:25 EST 2004

That's right, some of those numbers were used for "loop-around" transmission
testing of trunk circuits.  Having been in the telecommunications industry
for 30+ years, I remember many times hearing kid's conversations when we
tried to use them for their intended purpose.  After listening to them for a
little while, one of my co-workers would sometimes plug in and say "this is
the police and we have your phone numbers!" That usually scared them off -
hi hi.


-----Original Message-----
From: amradio-bounces at mailman.qth.net
[mailto:amradio-bounces at mailman.qth.net]On Behalf Of Robert M. Bratcher
Sent: Saturday, November 13, 2004 9:31 PM
To: Discussion of AM Radio
Subject: Re: [AMRadio] Numbers Stations - NPRs slant

At 10:54 AM 11/13/2004, you wrote:
>I was never in on the busy signal thing, but I did do something 
>similar.  Telephone numbers that had the suffix beginning with 99 were 
>designated as "official" numbers for internal phone company use.  As I 
>recall, you could dial xxx-9929 and have a friend dial xxx-9930, and the 
>two of you could hold a conversation.

Thats known as a loop. Lots of them out there but most are muted so you 
can't talk on them. Other prefix exchanges worked too.
The other fun thing is to find a bridge which is a bunch of numbers toed 
together so several people could be on at once.
I used to be a phone phreak in my younger days back when the blue box (for 
free long distance called) used to work.


The coin sounds in a payphone is called a red box. Doesn't work on COCOT 
(customer owned) payphones because the dialtone you hear is not from Ma 
Bell's line but generated by the phone. 

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