Re: AKICIF: Security cameras
- From: cryptoguy <treifamily@xxxxxxxxx>
- Date: Sat, 13 Sep 2008 15:38:30 -0700 (PDT)
On Sep 13, 6:29 pm, "Keith F. Lynch" <k...@xxxxxxxxxxxxxx> wrote:
Nels Satterlund <Ne...@xxxxxxxxxxxxxx> wrote:
Even though I have one of those cards, bought at Radio Shack back
when I worked on IRDA stuff, at home I just use my IR headphones to
see if the remote is functioning.
That reminds me of when I used to test data lines with a telephone
earpiece. I got to the point where I could tell the baud rate
and the parity by ear. I never was able to follow what was being
sent, though.
Since remote control pulses are much slower, it may be possible
to tell which button was pushed just by listening to the pattern
of pulses.
Back in the 80s, I worked on telecommunications for Irving Trust,
a major money center bank in NYC. 'Bank by computer' was in
its infancy, but we did develop a system.
This used 1200 baud dialups - state of the art at the time. In
the Bell 212A protocol, the answering modem would listen for
a tone from the calling modem, and then respond in kind.
I found that I could call a modem using my desk phone,
and get it to answer back to my whistling. This was very handy
for checking modem banks for dud devices.
Peter Trei
.
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