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Posted by Gordon Jarret on April 5, 2007, 2:25 am
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Hi
I'm working for a social research firm that dials random numbers from the
phone book. At least 1 in 5 are disconnected, and I'm told there is a way to
electronically detect disconnected numbers without waiting for the recorded
message.
I'm a database programmer, so I don't know much about telcos, but I'm
guessing that either there is a different impedance across the pair when the
exchange answers, or an inaudible frequency that indicates whether or not a
number is live. That's all I can think of.
Someone solved this once before for my boss when he was at another company,
but their code is proprietory, so I have to start again. I hope someone can
help.
TIA
Gordon
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Posted by danny burstein on April 5, 2007, 2:40 am
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>Hi
>I'm working for a social research firm that dials random numbers from the
>phone book.
Gee, that's nice. I live with about 300 million other US residents
who get pissed as hell when we get these phone calls.
How'd you like it if all the people you randomly dial got
ahold of your phone numbers and called you back? How much
would your boss like it?
--
_____________________________________________________
Knowledge may be power, but communications is the key
dannyb@panix.com
[to foil spammers, my address has been double rot-13 encoded]
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Posted by Carl Navarro on April 5, 2007, 7:34 am
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On Thu, 5 Apr 2007 06:40:52 +0000 (UTC), danny burstein
>
>>Hi
>
>>I'm working for a social research firm that dials random numbers from the
>>phone book.
>
>Gee, that's nice. I live with about 300 million other US residents
>who get pissed as hell when we get these phone calls.
>
>How'd you like it if all the people you randomly dial got
>ahold of your phone numbers and called you back? How much
>would your boss like it?
Yeah, but at least he's not in the U.S.
Gordon, here we use 3 distinct tones called SIT tones to indicate a
non-working number and random number dialing is illegal in most, if
not all, states.
Carl
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Posted by danny burstein on April 5, 2007, 8:31 am
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[ snip ]
>>How'd you like it if all the people you randomly dial got
>>ahold of your phone numbers and called you back? How much
>>would your boss like it?
>Yeah, but at least he's not in the U.S.
yabbut, he's also a hypocrite. Here he's talking about
making annoyance calls, yet he's got a spam-blocked
address in his post.
>Gordon, here we use 3 distinct tones called SIT tones to indicate a
>non-working number and random number dialing is illegal in most, if
>not all, states.
Alas, (no) thanks to the best Congress money can buy,
"non profit" research/polling calls (along with calls
from politicians...) are exempt from most of
the "do not call" regs.
--
_____________________________________________________
Knowledge may be power, but communications is the key
dannyb@panix.com
[to foil spammers, my address has been double rot-13 encoded]
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Posted by Gordon Jarret on April 5, 2007, 11:24 am
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In the social research industry, we do understand that some people either
have no opinion, or do not wish to express it. That's fine. We hope though,
that when you refuse to tell us what you think about for example, health or
defence policy, that you forfeit your right to complain when the actions of
government agencies are contrary to your wishes.
At the ballot box, you only get to choose a candidate. It is only through
social research that you get to tell the candidate what you want them to do.
This thread has apparently ceased to have anything to do with telecoms, and
I will not be further drawn on comments not relevant to my question.
Gordon
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