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