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              Outbreak Magazine Issue #12 - Article 1 of 18
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**Intercepting & re-transmitting data over phone lines** - By Captain B

Fax machines, modems, CID (Caller ID) units, and even TTY/TDD machines all 
transmit data over landline phone lines. And, of course, all data is sent 
over phone lines in the form of sounds. So, just as you can record a string 
of DTMF (touch tones), and play it back after recorded to dial that same 
number, or voice mailbox passcode, or whatever, so too could you also record 
a fax transmition, then play back that transmition over a phone line 
connected to a fax machine. Thereby re- transmitting the same fax document. 

Much the same thing is the case for TTY/TDD machines. You could record an 
entire conversation between 2 people using a TTY/TDD on each end of the line, 
or even between a relay operator and a person using a TTY/TDD. After 
recording the TTY/TDD conversation, simply play it back while a TTY/TDD is on 
the other end of the line to re-transmit all the data (the TTY/TDD 
conversation) again. Recording CID data transmitions will, of course, enable 
you to spoof sent caller ID. (Orange box) But since that's already been 
covered in 2600 magazine, and on the Internet, I won't bother going into that. 
With modems and computer networks however, things aren't as straightforward. 
Since you have such security features as the 3 way handshake with TCP/IP, 
things get more complex than they do with fax and TTY/TDD machines. I'll 
leave that sort of thing alone, and continue on about recording methods. The 
most common method is to use a cassette or micro cassette recorder. Radio 
Hack sells a "Phone cassette recorder" (Cat# 43-473 Cost: $99.99) but, any 
cassette recorder with either a mic input jack, or left/right channel "audio 
in" RCA phono jacks will work. You'll need to buy one of Radio Shack's 
recorder controls. 2 of which (Cats. #43-228 and 43-1236) connect between 
your phone and phone jack. Another, (Cat# 43-1237) connects between your 
phone and the handset. And the last one (Cat# 44-533) is nothing more than a 
suction cup mic that attaches near the receiver (earpiece) of your handset. 
The price range for these is between $24.99 for the deluxe recorder control, 
to $4.49 for the telephone pickup suction cup mic. All use a 1/8 plug for 
connecting to 1/8 jacks. But, with the countless audio plug adapters availible, 
you can adapt the 1/8 plug to an RCA phono plug, 1/4 plug, even the more 
obscure 3/32 plug. By using these adapters, you can connect up your phone line 
via a recorder to various types of equipment for audio monitoring or recording 
purposes. For instance, you could connect up to a stereo amp for monitoring, 
or a stereo amp with a cassette deck connected to the amp for recording purposes. 
You could also connect up to standard cassette or micro cassette 
dictation-type recorders, and tapeless digital dictation-type recorders. With 
certain tapeless digital recorders, you can even upload the audio to your PC 
as a .wav file. 2 phone recorders that connect to your PC can be found at 
http://www.ahernstore.com/phonerecorders.html And, they also sell standard 
phone recorders, too. And, Radio Shack sells 2 digital tapeless dictation-type 
recorders you could use with a recorder control to connect it to your phone 
line, and then connect to a PC for uploading the audio. Or, you could just 
connect up the recorder control directly to the sound card on your PC, and 
run a program that records the audio as a .wav file. You could even connect 
up to a DJ stereo mixer, or CD recorder (burner). As long as you use the 
proper audio plug adapters, you can connect up to many different types of 
audio equipment. There's lots of possibilities. For example, when connecting 
to a single (Mono) RCA phono plug, use a 1/8 jack-to-RCA phono plug adapter. 

In the case of any stereo audio equipment with seperate L/R audio inputs, 
attach the 1/8 jack-to-RCA phono plug adapter to a RCA phono jack-to-dual 
RCA phono plugs "Y adapter". Ask them at Radio Shack about other adapters 
if you need to. It'll give them something else to do besides asking for your 
name/address/phone number when making purchases. Have fun.
