OT: telephone black box
Robert Baer
1) Plugs into phone line, phone plugs into the black box.
2) Black box records all possible info concerning incoming calls for
later viewing and evidence gathering.
3) If incoming call is not in (programmable) list, then the caller hears
the 3 magic tones as loud as possible followed by a message delivered
s.l.o.w.l.y. "The number you have dialed is not active" and (options)
immediately hang up, OR forward call WITH CID info to a provided number
(say police non-emergency or FBI).
4) If call is in list, then the connected phone rings (call "forwarded"
to it).
5) Memory allows storage of at least 100 incoming SpamCalls per day, say
minimum of 500 total.
Is there anything like this on the market?
If such a device was designed, what would be the estimated sales price?
mpm
> � �Prelim specs:
You could do all this with a TrixBox.
Google TrixBox or Asterisk.
-mpm
Ross Herbert
: Prelim specs:
And if by some human error, a legitimate caller is included in the black list,
and upon hearing the loud message or being diverted to police/FBI, then
complains to the communications regulating authority, how are you going to
explain that you have connected a possibly unauthorised piece of equipment to
the telco line?
JeffM
>And if by some human error, a legitimate caller is included in the black list,
>and upon hearing the loud message or being diverted to police/FBI,
>then complains to the communications regulating authority,
>how are you going to explain that you have connected
>a possibly unauthorised piece of equipment to the telco line?
Since deregulation in the 1980s,
there's almost nothing you can't hook to your phone line in the USA.
The exception is an fully-automated spam call maker
--and it being illegal
doesn't seem to stop the douchebags from doing that anyway.
Don Bowey
e6d0806d-478d-480d...@i76g2000hsf.googlegroups.com, "JeffM"
<jef...@email.com> wrote:
Deregulation did not remove the technical requirements for equipment
connected to the network. It DID permit the connection of any and all
equipment meeting the technical requirements given in CFR 47, Part 68.
Also, there are ANSI Standards for the various Interface types, which also
provide the technical requirements.
Ross Herbert
I would be prepared to bet that calls diverted to the police/FBI would get them
hopping and I'm sure they would ensure that this practice was stopped, at the
very least.
Michael A. Terrell
I'd like to get my hands on the SOBs running the ones for Obama. I'm
tired of having the damn things wake me up. It would be a case of
justified homicide.
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There are two kinds of people on this earth:
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The first sign of insanity is denying that you're crazy.
Jim Thompson
>
>JeffM wrote:
>>
>> Ross Herbert wrote:
>> >And if by some human error, a legitimate caller is included in the black list,
>> >and upon hearing the loud message or being diverted to police/FBI,
>> >then complains to the communications regulating authority,
>> >how are you going to explain that you have connected
>> >a possibly unauthorised piece of equipment to the telco line?
>>
>> Since deregulation in the 1980s,
>> there's almost nothing you can't hook to your phone line in the USA.
>> The exception is an fully-automated spam call maker
>> --and it being illegal
>> doesn't seem to stop the douchebags from doing that anyway.
>
>
>
> I'd like to get my hands on the SOBs running the ones for Obama. I'm
>tired of having the damn things wake me up. It would be a case of
>justified homicide.
I'm mulling over a design for a box that blanks the first ring, reads
the CID... no match to addressbook = continues to blank ring and lets
it roll into VM (legitimate caller, cold caller won't wait that long).
800, 877, etc... short line to "answer" call with dead air ;-)
I'll need help from a person experienced with uP's. I can manage the
analog.
...Jim Thompson
--
| James E.Thompson, P.E. | mens |
| Analog Innovations, Inc. | et |
| Analog/Mixed-Signal ASIC's and Discrete Systems | manus |
| Phoenix, Arizona 85048 Skype: Contacts Only | |
| Voice:(480)460-2350 Fax: Available upon request | Brass Rat |
| E-mail Icon at http://www.analog-innovations.com | 1962 |
I love to cook with wine Sometimes I even put it in the food
donald
Do you want a PC app or and embedded app ?
I ask because, how would you get the "addressbook" information into an
embedded app.
A PC app has the entire PC for "database" storage.
Of course, "blanking" the line for all extensions maybe a problem.
donald
Michael A. Terrell
Why? There are two or three pairs in common telepone station wire.
Install the interface like you would with a RJ38X for an alarm system.
That way all phones loop though that one jack. It's a concept that's
been around for about 30 years.
http://www.kraycablinginc.com/technical_info/diagrams/rj38x.html
Robert Baer
Close to what i would like it to do.
Callers not on the whitelist get a recording (in my case) the 3 tones
followed by "the number you have dialed does not accpt calls" and hangs up.
Give us an idea concerning costs..
Robert Baer
It must be a stand-alone especially for decent sales.
Most people will not tolerate a computer in his kitchen where the
phone outlet is (space, looks, etc).
It would be nice, but not too cost effective and/or feasable to use
the attached phone's keypad, so...one seems to be stuck with having a
keypad on the black box.
donald
> It must be a stand-alone especially for decent sales.
> Most people will not tolerate a computer in his kitchen where the
> phone outlet is (space, looks, etc).
> It would be nice, but not too cost effective and/or feasable to use
> the attached phone's keypad, so...one seems to be stuck with having a
> keypad on the black box.
Maybe a simple 2 button interface would work.
When a new number comes in, the user would look at the number and press
a RED button or a GREEN button.
This will put that new number into the white list or the black list.
After a few months, most known callers will be white listed.
Problem is "dinner time advertising" calls will get through until they
are black listed.
Looks like a full keypad is still required.
donald
Jim Thompson
Not a problem at all... insert box at telco entry point into house.
>>
>> donald
> It must be a stand-alone especially for decent sales.
> Most people will not tolerate a computer in his kitchen where the
>phone outlet is (space, looks, etc).
> It would be nice, but not too cost effective and/or feasable to use
>the attached phone's keypad, so...one seems to be stuck with having a
>keypad on the black box.
Why not pass info back-and-forth via USB to a PC, location of your
choice, or even use a wireless router??
donald
But the display portion needs to be available to the user. ( you )
>
>>> donald
>> It must be a stand-alone especially for decent sales.
>> Most people will not tolerate a computer in his kitchen where the
>> phone outlet is (space, looks, etc).
>> It would be nice, but not too cost effective and/or feasable to use
>> the attached phone's keypad, so...one seems to be stuck with having a
>> keypad on the black box.
>
> Why not pass info back-and-forth via USB to a PC, location of your
> choice, or even use a wireless router??
>
> ...Jim Thompson
This is the crux of the question.
Is this a PC app with all the resources available to a PC or
Is this a standalone app with limited resources.
I, as many here have developed CID devices in the past.
Not much analog involved, CID chips abound, add a microcontroller and
software and its done.
I purchased a caller ID box from Target or somewhere a few years ago,
disassembled it and found on 8051 single chip processor inside.
Removed the chip and replaced it with my own.
Was kind of fun for awhile, but it never got finished.
That is where my questions are coming from.
donald
Robert Baer
computer are not competent to do that.
There may be a small MCU in some of the newer phones, notably those
that have a remote handset, BUT none of them"tie in" to any ASSuMEd PC.
Robert Baer
Perhaps you have a running start to the stand-alone black box that i
have in mind.
If so, need a loan of another pair of shoes?
donald
LOL,
My interest at the time was to capture the CID and then dial out to a
pager and send that number to the pager.
It did work, but the pager people changed the interface to their system.
Project died at that point.
The biggest challenge to a stand alone black box is entry of unwanted
numbers, or wanted numbers for that matter.
Yes, the embedded app can interface to a PC via all sorts of
communications media.
But, Jim what do you want to see.
donald
Jim Thompson
On Thu, 25 Sep 2008 06:32:48 -0600, donald <don...@notinmyinbox.com>
wrote:
Ideal box:
(1) Blanks first ring
(2) Examines CID and determines whether to ring phones, roll to VM, or
"answer/hang-up" to kill 800 numbers
(3) Programmable via phone may be difficult... maybe two boxes, one at
telco entry point (to apply procedures to ALL phones in house), one by
phone for programmability.
donald
Yes, good start
> (2) Examines CID and determines whether to ring phones, roll to VM, or
> "answer/hang-up" to kill 800 numbers
This is the problem child as I see it.
Where did the database/whitelist/blacklist of numbers come from ??
> (3) Programmable via phone may be difficult... maybe two boxes, one at
> telco entry point (to apply procedures to ALL phones in house), one by
> phone for programmability.
This too needs more thinking about.
Having an entry point CID and programmable relay would be kind of cool here.
The CID data would be transfered to the second box.
The second box would toggle the relay(s) to the programmed destination.
Getting the CID information is easy.
What to do about it is the question.
The destination needs to be defined as well.
How many destinations would you like to see.
1) pass to regular phone circuits in the house.
2) pass to screaming obnoxious noise maker.
3) ????
The relay box would need the wiring defined.
Lets say for the sake....
A telco interface ( analog!) that can be programmed with sound effects,
polite "do not call" message, whatever is on line 2.
Should this device also be stand alone ? ( computer would be easy )
Is it part of the internal control box ? ( I'd say yes )
How would you like to see these messages programmed into this box ?
donald
>
> ...Jim Thompson
Jim Thompson
On Thu, 25 Sep 2008 10:44:51 -0600, donald <don...@notinmyinbox.com>
wrote:
From a USB link to a PC or...
>
>> (3) Programmable via phone may be difficult... maybe two boxes, one at
>> telco entry point (to apply procedures to ALL phones in house), one by
>> phone for programmability.
>
>This too needs more thinking about.
>
>Having an entry point CID and programmable relay would be kind of cool here.
>The CID data would be transfered to the second box.
>The second box would toggle the relay(s) to the programmed destination.
I think I can already do that, either off-the-shelf (expensive) or
roll my own... I have a killer analog FSK detector design (1200 Baud)
that has wonderful noise immunity... dating from the early '70's when
I had to roll my own modems ;-)
>
>Getting the CID information is easy.
>What to do about it is the question.
>
>The destination needs to be defined as well.
>
>How many destinations would you like to see.
>1) pass to regular phone circuits in the house.
>2) pass to screaming obnoxious noise maker.
>3) ????
>
>The relay box would need the wiring defined.
>Lets say for the sake....
>
>A telco interface ( analog!) that can be programmed with sound effects,
>polite "do not call" message, whatever is on line 2.
>
>Should this device also be stand alone ? ( computer would be easy )
>Is it part of the internal control box ? ( I'd say yes )
>
>How would you like to see these messages programmed into this box ?
I think we have enough collective talent here to make such a box.
Wonder how we might get together and collaborate?
>
>
>donald
>
>>
>> ...Jim Thompson
Don Bowey
"Jim Thompson" <To-Email-Use-Th...@My-Web-Site.com> wrote:
The chances are about as good as getting a joint design for an ESR meter.
JosephKK
You seem to have a very 1960's view of what is allowed to be connected
to a part 68 telephone line. I can connect almost any hack i can come
up with if i meet a few requirements. I only need meet modest
additional requirements if i want to sell it.
JosephKK
It is slightly off my current forte, but i can do it. So could many
others here (John L,. Jorge, Demeter, Nico and many others). Just the
same i am interested, some of those others may not be.
JosephKK
I am not so sure, programming by SD card, USB gum stick, USB cable,
bluetooth, 802.11a/b/g/n are all reasonable options. Just remember
the KISS rule.
Jim Thompson
On Mon, 29 Sep 2008 22:53:01 -0700, JosephKK <quiett...@yahoo.com>
wrote:
How hard would it be to use a uP in the "black box" to look up numbers
in a memory stick?
donald
A USB memory stick is not simple for most micros.
A USB host circuit needs to be added and programmed.
A MMC/SD card would be much easier.
That would require FAT16/FAT32 code in the micro.
A serial port (USB or standard ) would be easiest.
Any other technology (wireless or wired) would require hardware above
and beyond the "black box" requirements.
donald
krw
Use-The-En...@My-Web-Site.com says...
This is not at all an easy task, though I believe the necessary code
is available for some micros. There is a lot of device management
(bad blocks, load leveling, etc.) that goes on under the covers.
--
Keith
Robert Baer
the end-user as not everyone that buys a phone has a computer.
donald
> That should be fairly easy, but only as an option (not required) for
> the end-user as not everyone that buys a phone has a computer.
This is the second time someone has mentioned a mass produced product.
If I understood the OP correctly, this would be a one off project.
As a one off project, its what the OP wants to deal with.
You are correct that not every one has a computer for this type of thing.
It seems that many agree that the basic part of this project is easy,
its getting the white/black lists into the device thats a problem.
donald
Jim Thompson
On Wed, 01 Oct 2008 17:40:52 -0600, donald <don...@notinmyinbox.com>
wrote:
I guess you could do it with thumb-wheel switches ;-)
Michael A. Terrell
Jim Thompson wrote:
>
> On Wed, 01 Oct 2008 17:40:52 -0600, donald <don...@notinmyinbox.com>
> wrote:
>
> >Robert Baer wrote:
> >
> >> That should be fairly easy, but only as an option (not required) for
> >> the end-user as not everyone that buys a phone has a computer.
> >
> >This is the second time someone has mentioned a mass produced product.
> >
> >If I understood the OP correctly, this would be a one off project.
> >
> >As a one off project, its what the OP wants to deal with.
> >
> >You are correct that not every one has a computer for this type of thing.
> >
> >It seems that many agree that the basic part of this project is easy,
> >its getting the white/black lists into the device thats a problem.
> >
> >donald
>
> I guess you could do it with thumb-wheel switches ;-)
Damn, you really ARE old. ;-)
Jim Thompson
>
>Jim Thompson wrote:
>>
>> On Wed, 01 Oct 2008 17:40:52 -0600, donald <don...@notinmyinbox.com>
>> wrote:
>>
>> >Robert Baer wrote:
>> >
>> >> That should be fairly easy, but only as an option (not required) for
>> >> the end-user as not everyone that buys a phone has a computer.
>> >
>> >This is the second time someone has mentioned a mass produced product.
>> >
>> >If I understood the OP correctly, this would be a one off project.
>> >
>> >As a one off project, its what the OP wants to deal with.
>> >
>> >You are correct that not every one has a computer for this type of thing.
>> >
>> >It seems that many agree that the basic part of this project is easy,
>> >its getting the white/black lists into the device thats a problem.
>> >
>> >donald
>>
>> I guess you could do it with thumb-wheel switches ;-)
>
>
> Damn, you really ARE old. ;-)
Let's make that, "Seasoned" ;-)
I still have some in my parts bin with diode decoding to BCD ;-)
Michael A. Terrell
Jim Thompson wrote:
>
> On Wed, 01 Oct 2008 20:24:34 -0400, "Michael A. Terrell"
> <mike.t...@earthlink.net> wrote:
>
> >
> >Jim Thompson wrote:
> >>
> >> On Wed, 01 Oct 2008 17:40:52 -0600, donald <don...@notinmyinbox.com>
> >> wrote:
> >>
> >> >Robert Baer wrote:
> >> >
> >> >> That should be fairly easy, but only as an option (not required) for
> >> >> the end-user as not everyone that buys a phone has a computer.
> >> >
> >> >This is the second time someone has mentioned a mass produced product.
> >> >
> >> >If I understood the OP correctly, this would be a one off project.
> >> >
> >> >As a one off project, its what the OP wants to deal with.
> >> >
> >> >You are correct that not every one has a computer for this type of thing.
> >> >
> >> >It seems that many agree that the basic part of this project is easy,
> >> >its getting the white/black lists into the device thats a problem.
> >> >
> >> >donald
> >>
> >> I guess you could do it with thumb-wheel switches ;-)
> >
> >
> > Damn, you really ARE old. ;-)
>
> Let's make that, "Seasoned" ;-)
>
> I still have some in my parts bin with diode decoding to BCD ;-)
I have a bunch, too. They were surplused when Microdyne closed
their sat receiver repair service.I also have a bunch of nice Grayhill
keypads.
http://home.earthlink.net/~mike.terrell/Epswi.html
JosephKK
Actually re-creating the IP is much more expensive than just buying it
for any of my mentioned solutions. Nor is it very expensive, it is
not free as far as i know (unless under a GPL or BSD type licence, be
careful if using either of these). Load leveling has already been
moved off to the memory devices. RFID type stuff is not too expensive
and can be in unlicensed bands. With a little work you can transfer
useful data. Bluetooth may be useful but 802.11 is probably out of
reach economically (perhaps except for some premium devices, marketing
sliding fence).
JosephKK
<To-Email-Use-Th...@My-Web-Site.com> wrote:
>
>On Wed, 01 Oct 2008 17:40:52 -0600, donald <don...@notinmyinbox.com>
>wrote:
>
>>Robert Baer wrote:
>>
>>> That should be fairly easy, but only as an option (not required) for
>>> the end-user as not everyone that buys a phone has a computer.
>>
>>This is the second time someone has mentioned a mass produced product.
>>
>>If I understood the OP correctly, this would be a one off project.
>>
>>As a one off project, its what the OP wants to deal with.
>>
>>You are correct that not every one has a computer for this type of thing.
>>
>>It seems that many agree that the basic part of this project is easy,
>>its getting the white/black lists into the device thats a problem.
>>
>>donald
>
>I guess you could do it with thumb-wheel switches ;-)
>
> ...Jim Thompson
USB slave is starting to look real good. You can buy USB RS232 uP
slave kits for under US$100. One quad and one dual op amp, a PLL
maybe, and a comparator can do most the analog. Need two fancy
borschts though, should be standard ICs by now. Switching ringing
voltage and possible CNID reinsertion may complicate things a bit.
Robert Baer
Answer phone; if CID indicates call is on whitelist (no blacklist)
then it gets passed thru - else a message is played and call is terminated.
Message options: (1) three magic tones followed by "the number you
have dialed is no longer in service" (or other similar pre-programmed
messages including <none>), (2) <none> IE: it plain hangs up on the
b@tard, or recordable message.
Getting the white list in (and editable) would seem to mean that a
touch-tone 3x4 array would be a mnimal requirement.
Robert Baer
> On Wed, 01 Oct 2008 17:40:52 -0600, donald <don...@notinmyinbox.com>
> wrote:
>
>
>>Robert Baer wrote:
>>
>>
>>> That should be fairly easy, but only as an option (not required) for
>>>the end-user as not everyone that buys a phone has a computer.
>>
>>This is the second time someone has mentioned a mass produced product.
>>
>>If I understood the OP correctly, this would be a one off project.
>>
>>As a one off project, its what the OP wants to deal with.
>>
>>You are correct that not every one has a computer for this type of thing.
>>
>>It seems that many agree that the basic part of this project is easy,
>>its getting the white/black lists into the device thats a problem.
>>
>>donald
>
>
> I guess you could do it with thumb-wheel switches ;-)
>
> ...Jim Thompson
Yes; that would make the unit look unique and may make that a selling
item.
donald
Looking at the first post in this thread, I don't see a mass produced
product.
But now I know.
"Robert Baer said:
Prelim specs:
1) Plugs into phone line, phone plugs into the black box.
2) Black box records all possible info concerning incoming calls for
later viewing and evidence gathering.
3) If incoming call is not in (programmable) list, then the caller hears
the 3 magic tones as loud as possible followed by a message delivered
s.l.o.w.l.y. "The number you have dialed is not active" and (options)
immediately hang up, OR forward call WITH CID info to a provided number
(say police non-emergency or FBI).
4) If call is in list, then the connected phone rings (call "forwarded"
to it).
5) Memory allows storage of at least 100 incoming SpamCalls per day, say
minimum of 500 total.
Is there anything like this on the market?
If such a device was designed, what would be the estimated sales price? "
donald
Jim Thompson
On Wed, 01 Oct 2008 22:07:45 -0700, JosephKK <quiett...@yahoo.com>
wrote:
>On Wed, 01 Oct 2008 16:50:47 -0700, Jim Thompson
><To-Email-Use-Th...@My-Web-Site.com> wrote:
>
>>
>>On Wed, 01 Oct 2008 17:40:52 -0600, donald <don...@notinmyinbox.com>
>>wrote:
>>
>>>Robert Baer wrote:
>>>
>>>> That should be fairly easy, but only as an option (not required) for
>>>> the end-user as not everyone that buys a phone has a computer.
>>>
>>>This is the second time someone has mentioned a mass produced product.
>>>
>>>If I understood the OP correctly, this would be a one off project.
>>>
>>>As a one off project, its what the OP wants to deal with.
>>>
>>>You are correct that not every one has a computer for this type of thing.
>>>
>>>It seems that many agree that the basic part of this project is easy,
>>>its getting the white/black lists into the device thats a problem.
>>>
>>>donald
>>
>>I guess you could do it with thumb-wheel switches ;-)
>>
>> ...Jim Thompson
>
>USB slave is starting to look real good. You can buy USB RS232 uP
>slave kits for under US$100. One quad and one dual op amp, a PLL
>maybe, and a comparator can do most the analog. Need two fancy
>borschts though, should be standard ICs by now.
What's "borscht"? Some kind of soup ?:-)
>Switching ringing
>voltage and possible CNID reinsertion may complicate things a bit.
>
Naaaah! That's the parts I've solved trivially ;-)
Jim Thompson
And an LCD screen to scroll thru to add/edit/delete entries.
krw
mike.t...@earthlink.net says...
>
> Jim Thompson wrote:
> >
> > On Wed, 01 Oct 2008 17:40:52 -0600, donald <don...@notinmyinbox.com>
> > wrote:
> >
> > >Robert Baer wrote:
> > >
> > >> That should be fairly easy, but only as an option (not required) for
> > >> the end-user as not everyone that buys a phone has a computer.
> > >
> > >This is the second time someone has mentioned a mass produced product.
> > >
> > >If I understood the OP correctly, this would be a one off project.
> > >
> > >As a one off project, its what the OP wants to deal with.
> > >
> > >You are correct that not every one has a computer for this type of thing.
> > >
> > >It seems that many agree that the basic part of this project is easy,
> > >its getting the white/black lists into the device thats a problem.
> > >
> > >donald
> >
> > I guess you could do it with thumb-wheel switches ;-)
>
>
> Damn, you really ARE old. ;-)
We're still using (lots of) them in new products. I think they're
ugly, but I don't get a vote.
--
Keith
Michael A. Terrell
krw wrote:
>
> We're still using (lots of) them in new products. I think they're
> ugly, but I don't get a vote.
What brand? The Cherry swiches we used to use are all discontinued.
The prices were going up, and the other brands we sampled were all
crap. It reached the point that it was cheaper to use a MPU front panel
with a keypad, and some LED displays. The last I used were in a test
fixture, and the replacements failed in less than six months, while the
original Cherry switches were over 10 years old. The remaining
inventory of brands of thumbwheel swithes had disolved, wherever they
manufacturer had used their contact lube. Turn the wheels a couple
times, and they just fell apart.
krw
mike.t...@earthlink.net says...
>
> krw wrote:
> >
> > We're still using (lots of) them in new products. I think they're
> > ugly, but I don't get a vote.
>
>
> What brand? The Cherry swiches we used to use are all discontinued.
Dunno. I'd have to look 'sm up in the parts database.
> The prices were going up, and the other brands we sampled were all
> crap. It reached the point that it was cheaper to use a MPU front panel
> with a keypad, and some LED displays.
Already got all that (LCD grahics display).
> The last I used were in a test
> fixture, and the replacements failed in less than six months, while the
> original Cherry switches were over 10 years old. The remaining
> inventory of brands of thumbwheel swithes had disolved, wherever they
> manufacturer had used their contact lube. Turn the wheels a couple
> times, and they just fell apart.
Haven't had any reports of failure. There are a lot of 'em on the
panels. They look like they're right out of the '50s, IMO.
--
Keith
Robert Baer
#1: "Is there anything like this on the market?"
#2: "If such a device was designed, what would be the estimated sales
price?"
Robert Baer
Check.
Robert Baer
> Prelim specs:
> 1) Plugs into phone line, phone plugs into the black box.
> 2) Black box records all possible info concerning incoming calls for
> later viewing and evidence gathering.
> 3) If incoming call is not in (programmable) list, then the caller hears
> the 3 magic tones as loud as possible followed by a message delivered
> s.l.o.w.l.y. "The number you have dialed is not active" and (options)
> immediately hang up, OR forward call WITH CID info to a provided number
> (say police non-emergency or FBI).
> 4) If call is in list, then the connected phone rings (call "forwarded"
> to it).
> 5) Memory allows storage of at least 100 incoming SpamCalls per day, say
> minimum of 500 total.
> Is there anything like this on the market?
> If such a device was designed, what would be the estimated sales price?
Myelf and others are interested in buying such an item; what is the
prognosis?
Robert Baer
Jim Thompson
I'm still thinking on it... particularly since this election season
I've been beleaguered by "800" number calls from all the candidates.
I'm thinking of adapting the ring blocker that was discussed some time
ago to simply not allow any such numbers to ring through.
That doesn't solve the general programmability requirement though.
donald
It would seem that Robert will accept any "programmability requirement".
I wish I had the time, this could be kind of interesting.
donald
Jim Thompson
On Thu, 16 Oct 2008 11:20:20 -0600, donald <don...@notinmyinbox.com>
wrote:
It would be a marvelous product. DO NOT CALL would finally have
meaning ;-)
Robert Baer
CID info, and a "touch tone" keypad for data input might be the least
expensive way to go.
Robert Baer
> Prelim specs:
> 1) Plugs into phone line, phone plugs into the black box.
> 2) Black box records all possible info concerning incoming calls for
> later viewing and evidence gathering.
> 3) If incoming call is not in (programmable) list, then the caller hears
> the 3 magic tones as loud as possible followed by a message delivered
> s.l.o.w.l.y. "The number you have dialed is not active" and (options)
> immediately hang up, OR forward call WITH CID info to a provided number
> (say police non-emergency or FBI).
> 4) If call is in list, then the connected phone rings (call "forwarded"
> to it).
> 5) Memory allows storage of at least 100 incoming SpamCalls per day, say
> minimum of 500 total.
> Is there anything like this on the market?
> If such a device was designed, what would be the estimated sales price?
Marketeers are driving me nuts.
Robert Baer
When can i buy even a prototype?
Jim Thompson
Be patient ;-)
...Jim Thompson
--
| James E.Thompson, P.E. | mens |
| Analog Innovations, Inc. | et |
| Analog/Mixed-Signal ASIC's and Discrete Systems | manus |
| Phoenix, Arizona 85048 Skype: Contacts Only | |
| Voice:(480)460-2350 Fax: Available upon request | Brass Rat |
| E-mail Icon at http://www.analog-innovations.com | 1962 |
Now that the value of our money is all queer they've decided to
inscribe the portrait of Barney Frank onto the One Dollar Bill.
Robert Baer
Be advised that the majority of SPAMcalls "id" as "UUU UNKNOWN
CALLER" or as "PPP PRIVATE CALLER" and the so-called trace (*57) does
not work.
So a "blacklist" of unwanted numbers is not all that useful.
Not that i object to such an idea, but the black box should reject /
shunt all calls not on the whitelist.
And a simple message to unwanted callers is not sufficent.
A selection of pre-programmed responses that the user can "piece
together" would seem to be ideal, and definitely should include those 3
magic tones.
"Instant pickup and response" is perfect, especially for those
unidentified callers - using the 3 tones.
BTW, what if the caller siezes the line? (happens sometimes)
Is there any way to ZAP them and recover use of the line?
Jim Thompson
On Thu, 13 Nov 2008 22:58:51 -0800, Robert Baer
<rober...@localnet.com> wrote:
My present land-line phone subscription can be set to block
anonymous/unknown callers. I have to turn it off when my doctor
calls.
> So a "blacklist" of unwanted numbers is not all that useful.
A good start is to simply block every "800-number".
> Not that i object to such an idea, but the black box should reject /
>shunt all calls not on the whitelist.
> And a simple message to unwanted callers is not sufficent.
> A selection of pre-programmed responses that the user can "piece
>together" would seem to be ideal, and definitely should include those 3
>magic tones.
> "Instant pickup and response" is perfect, especially for those
>unidentified callers - using the 3 tones.
>
> BTW, what if the caller siezes the line? (happens sometimes)
> Is there any way to ZAP them and recover use of the line?
Reverse potential drops the line.
I've also considered a "pass-key" approach not unlike those "enter
these four letters" web site controls. Have our machine "answer" the
phone and request a 4-number sequence to cause the line to ring.
Solicitors won't take the time.
...Jim Thompson
--
| James E.Thompson, P.E. | mens |
| Analog Innovations, Inc. | et |
| Analog/Mixed-Signal ASIC's and Discrete Systems | manus |
| Phoenix, Arizona 85048 Skype: Contacts Only | |
| Voice:(480)460-2350 Fax: Available upon request | Brass Rat |
| E-mail Icon at http://www.analog-innovations.com | 1962 |
JosephKK
<rober...@localnet.com> wrote:
POTS lines are loop start and no-loop stop. If i am hearing a
longwinded ad that interferes with what i wish to do, i just pop the
jack out of the wall for a few seconds. The call has been ended.
Jasen Betts
> POTS lines are loop start and no-loop stop. If i am hearing a
> longwinded ad that interferes with what i wish to do, i just pop the
> jack out of the wall for a few seconds. The call has been ended.
I've seen some that would only terminate the call if the caller hangs up.
this feature would allow the called party to hang up one handset and then
pick up in a different part of the house.
Robert Baer
The "block anonymous/unknown callers" does not work; somehow they got
thru anyway, so i dropped the costly and ineffective service.
"block every 800-number" is not an option provided by Quest, and i am
sure it would be as ineffective.
The "Caller Privacy" option was also useless.
Reversing the line potential to drop the line would be a nice option;
either automatic after the "end" of a "conersation" or with a (red)
pushbutton.
I do not think a "passkey" system is needed or ultimately useful,
because it cannot "zap" a marketeer in such a way as to permenantly
discourage them.
Something more "offensive" like the 3 tones followed by a choosable
message if there is a viable phone number, as well as an *immediate*
pickup on no number with 3 tones and same choices (immediate hangup,
Bronx cheer, etc etc).
Robert Baer
Nope! Not if they sieze the line.
Jim Thompson
On Sun, 16 Nov 2008 01:00:48 -0800, Robert Baer
<rober...@localnet.com> wrote:
"Hello! You are not wanted here. Go fuck yourself." [Hangup]
JosephKK
<rober...@localnet.com> wrote:
Misbehaving personal instruments exist, but no loop always terminates
the call, that is why i said unplug, not hang up. It is a legal
requirement in the US.
Jim Thompson
On Sun, 16 Nov 2008 11:27:36 -0800, JosephKK <quiett...@yahoo.com>
wrote:
[snip]
>
>Misbehaving personal instruments exist, but no loop always terminates
>the call, that is why i said unplug, not hang up. It is a legal
>requirement in the US.
>
Am I correct in recalling that you have to unplug for at least several
seconds?
...Jim Thompson
--
| James E.Thompson, P.E. | mens |
| Analog Innovations, Inc. | et |
| Analog/Mixed-Signal ASIC's and Discrete Systems | manus |
| Phoenix, Arizona 85048 Skype: Contacts Only | |
| Voice:(480)460-2350 Fax: Available upon request | Brass Rat |
| E-mail Icon at http://www.analog-innovations.com | 1962 |
If we knew what we were doing, it wouldn't be called research...
-- Albert Einstein
Robert Baer
The police suggested that the first words said should be rapid:
"don'tcall".
Your suggestion here is something that should not be in a retail
version, and i believe there is sufficent need for decent retail sales.
Robert Baer
> On Sun, 16 Nov 2008 11:27:36 -0800, JosephKK <quiett...@yahoo.com>
> wrote:
> [snip]
>
>>Misbehaving personal instruments exist, but no loop always terminates
>>the call, that is why i said unplug, not hang up. It is a legal
>>requirement in the US.
>>
>
>
> Am I correct in recalling that you have to unplug for at least several
> seconds?
>
> ...Jim Thompson
If one has more than one phone on the line, or an answering machine,
or (ahem) modem, or combination of those, then it would take a lot of
running around to different rooms to unplug them all.
Unplugging a phone only disconnects the AC coupled ringer for that
particular phone; unplugging OR hanging up removes all possibility of DC
current (AKA "loop").
So, even if there was only one phone, hanging up is the same as
unpluffing it - either breaks the DC loop.
JosephKK
Hook flash which breaks the DC loop for less than 1/2 second but more
than 1/20 second is used for signaling. Over one full second should
do the job and two seconds is quite reliable.
Multiple instruments on the line can be an issue if more than one
picks up, e.g. message machine and modem; some user voice (mostly
teleconference types) instruments can be set to auto answer. If
however only the message machine picks up; unplugging it alone is
quite sufficient.
T
rober...@localnet.com says...
When your phone company won't provide the advanced features you want,
spend a few bucks for a half decent PC, some FXO/FXS cards for the
computer and install Asterisk.
Jim Thompson
On Sat, 22 Nov 2008 14:45:49 -0500, T <kd1s....@cox.nospam.net>
wrote:
No.
For an affordable consumer product we need a microprocessor-controlled
system that can talk to most existing telephone sets, # or * key codes
to add/delete to a white-list.
I can see analog ways to block the first ring, yet show the CID on the
telephone set.
But I'm not enough uP savvy to add the controls.
Robert Baer
*and* the cost of power for 24hr/day running of that system?
Oh yes, and where do i put it??
And lastly, how does a phone get connected to the PC and how does one
use it?
Robert Baer
I agree on the basic approach.
As far as programming, maybe use ladder logic and the "compiler"
available at http://cq.cx/ladder.pl with a PIC controller?
Jim Thompson
On Sun, 23 Nov 2008 20:23:41 -0800, Robert Baer
<rober...@localnet.com> wrote:
It occurred to me just now what message to play, "Please hold, we
value your business"... 30 second pause..."Please hold, we value your
business"... 30 second pause..."Please hold, we value your
business"... ad nauseam ;-)
Robert Baer
A good option.
Totally useless against marketeer incoming calls in my case, because
they hangup almost immediately on pickup; that is why i emphasized the
possibility of presenting the 3 magic tones Plus other chooseable
message) the very *instant* the CID pops up.
David Lesher
The calling party has rapid disconnect. He hangs up and everything falls
down.
At the far end, well... The behaviour varies widely with different kinds
of switches in the terminating [i.e. called] office.
In an old Strodger CO it might never disconnect at all. [1] This was
exploited by bank robbers; they'd call all the numbers at a bank from pay
phones, leave them off hook and no one could call the cops when they came
in the door. That's one reason banks would have an unlisted number as
well.
Other switches may time out in a few seconds, tens of seconds, or a minute
or two.
You can have absolute control; if you have ISDN. It gave you signaling
and supervision not reliant on Dark Ages pulsing DC loops. Alas, the
Bells spent many many millions deploying ISDN and even more making it
undesirable for consumers.
2600 Hz is unlikely to do anything any more; there is no analog trunkage
left in the country, save a few museum pieces. ["Trunkage" has a meaning
here -- it's switch to switch, not switch to enduser.]
SIT tones work only if the caller is looking for them, and he hangs
up.
I do like the "please wait; your call is valuable to us...." approach.
1] Irving Texas, 1975. I was trying to call the local-yokel cab company
but.....
--
A host is a host from coast to coast.................wb8foz@nrk.com
& no one will talk to a host that's close........[v].(301) 56-LINUX
Unless the host (that isn't close).........................pob 1433
is busy, hung or dead....................................20915-1433
Robert Baer
The majority of the spamcallers hang up almost immediately, and
instantly if (somehow) they detect an answering machine.
So somehing a bit more "active" than an answering meching response is
required.
Jim Thompson
On Sat, 29 Nov 2008 01:22:26 -0800, Robert Baer
<rober...@localnet.com> wrote:
With "kill" based on CID I just thought of another feature:
At the 12th ring my phone rolls to voice mail. Set system for
allowing 11 rings for 800 numbers then "answer" (off hook for a few
seconds), prevents 800 crap in the voice mail ;-)
Robert Baer
> Prelim specs:
> 1) Plugs into phone line, phone plugs into the black box.
> 2) Black box records all possible info concerning incoming calls for
> later viewing and evidence gathering.
> 3) If incoming call is not in (programmable) list, then the caller hears
> the 3 magic tones as loud as possible followed by a message delivered
> s.l.o.w.l.y. "The number you have dialed is not active" and (options)
> immediately hang up, OR forward call WITH CID info to a provided number
> (say police non-emergency or FBI).
> 4) If call is in list, then the connected phone rings (call "forwarded"
> to it).
> 5) Memory allows storage of at least 100 incoming SpamCalls per day, say
> minimum of 500 total.
> Is there anything like this on the market?
> If such a device was designed, what would be the estimated sales price?
Harassment is increasing; have immediate need for a "minimum" device:
If CID gives no phone number, or number is on blacklist, then on
*immediate* detection, the call is answered with the magic three tones,
hang-up and reverse polarity for 30 seconds minimum.
Yelp....help...thanks.
Jim Thompson
<To-Email-Use-Th...@My-Web-Site.com> wrote:
[snip]
>
>With "kill" based on CID I just thought of another feature:
>
>At the 12th ring my phone rolls to voice mail. Set system for
>allowing 11 rings for 800 numbers then "answer" (off hook for a few
>seconds), prevents 800 crap in the voice mail ;-)
>
> ...Jim Thompson
New thoughts...
"Please hold for the next available agent.
While you are waiting please listen carefully to the following
choices:
If you calling from a call center located outside the United States,
stop deluding yourself that you live in an English-speaking country.
You don't speak proper English! Hang up NOW!
..."
Please add your thoughts ;-)
...Jim Thompson
--
| James E.Thompson, P.E. | mens |
| Analog Innovations, Inc. | et |
| Analog/Mixed-Signal ASIC's and Discrete Systems | manus |
| Phoenix, Arizona 85048 Skype: Contacts Only | |
| Voice:(480)460-2350 Fax: Available upon request | Brass Rat |
| E-mail Icon at http://www.analog-innovations.com | 1962 |
Usenet posts via gmail, yahoo, hotmail, aioe, uar or googlegroups
are now automatically kill-filed using Agent v5.0
To be white-listed, send request via the E-mail icon on my website
christofire
"Jim Thompson" <To-Email-Use-Th...@My-Web-Site.com> wrote in
message news:7s0ol4p4u900od904...@4ax.com...
> On Wed, 10 Dec 2008 11:55:15 -0700, Jim Thompson
> <To-Email-Use-Th...@My-Web-Site.com> wrote:
>
> [snip]
>>
>>With "kill" based on CID I just thought of another feature:
>>
>>At the 12th ring my phone rolls to voice mail. Set system for
>>allowing 11 rings for 800 numbers then "answer" (off hook for a few
>>seconds), prevents 800 crap in the voice mail ;-)
>>
>> ...Jim Thompson
>
> New thoughts...
>
> "Please hold for the next available agent.
>
> While you are waiting please listen carefully to the following
> choices:
>
> If you calling from a call center located outside the United States,
> stop deluding yourself that you live in an English-speaking country.
> You don't speak proper English! Hang up NOW!
>
> ..."
>
> Please add your thoughts ;-)
>
> ...Jim Thompson
One might be excused for thinking that many of those located inside the
United States (of America) 'don't speak proper English'.
'English US' ... sure!
Chris
Michael A. Terrell
christofire wrote:
>
> One might be excused for thinking that many of those located inside the
> United States (of America) 'don't speak proper English'.
As well as those in England. 'Proper English' doesn't exist, and
hasn't for over 100 years. From the British tourists and immigrants I
meet, what they speak is barely comprehensible, let alone 'Proper
English'.
The last was a young woman who said she was from 'North London', or
at least that was all I could figure out. Those call centers in India
were better english than what I've heard from England. Their speach was
clear, even if they were reading from a script.
--
http://improve-usenet.org/index.html
aioe.org, Goggle Groups, and Web TV users must request to be white
listed, or I will not see your messages.
If you have broadband, your ISP may have a NNTP news server included in
your account: http://www.usenettools.net/ISP.htm
There are two kinds of people on this earth:
The crazy, and the insane.
The first sign of insanity is denying that you're crazy.
Greegor
the three tones associated with a disconnected
or unavailable number message right?
Many teleservices companies use computerized
callers that kill the number on the list when they
pick that up. I have noticed that some of the
auto callers that play canned messages
respond to a 2 or 3 by reading out your phone
number and announcing that it's being removed
from their list. This sounds good but of
course there is no way of knowing if they
actually do.
More and more I'm getting irked with
faked caller ID.
Script kiddies with Linux and some VOIP services
are able to impersonate CID to look like anybody.
I know of one geek who has used this to harass,
order pizza, etc. and even used this to
fake out the Police in other cities on the
non emergency number. Real scumbag.
Big teleservices call centers are more and more
using their ISDN to present bogus CID as well.
There are teleservices companies who use
this option responsibly, but more and more are
using it in a way that more closely resembles fraud.
Ironically one of the best ways to unmask
and ID the VOIP jerk is to use ISDN (or trunk?)
which can access the system internal and not
fakable counterpart of Caller ID.
In THEORY the Police non emergency
number could access this information
rather than the bogus "presented" CID.
Perhaps I'm just crabby about the
caller ID fakery and longing to ID the
VOIP caller ID fakery jerk.
How impractical is it really for an individual
or small business to have access to this
internal and not fakable ID information?
Otherwise I like the idea of faking the
three tone ""disconnected message""
AND trying a long DTMF 2 and long DTMF 3
Happy new year!
o...@uakron.edu
H.R. 251:
Truth in Caller ID Act of 2007
To amend the Communications Act of 1934 to prohibit manipulation of
caller identification information, and for other purposes.
We got blasted here so bad in our little broken "swing" state that
I lost one hookswitch to fatigue failure.
By both sides, but Obama, clearly dominated.
Steve
Robert Baer
> On Wed, 10 Dec 2008 11:55:15 -0700, Jim Thompson
> <To-Email-Use-Th...@My-Web-Site.com> wrote:
>
> [snip]
>
>>With "kill" based on CID I just thought of another feature:
>>
>>At the 12th ring my phone rolls to voice mail. Set system for
>>allowing 11 rings for 800 numbers then "answer" (off hook for a few
>>seconds), prevents 800 crap in the voice mail ;-)
>>
>> ...Jim Thompson
>
>
> New thoughts...
>
> "Please hold for the next available agent.
>
> While you are waiting please listen carefully to the following
> choices:
>
> If you calling from a call center located outside the United States,
> stop deluding yourself that you live in an English-speaking country.
> You don't speak proper English! Hang up NOW!
>
> ..."
>
> Please add your thoughts ;-)
>
> ...Jim Thompson
99.9+ percent of junk callers *hang up* so fast that they cannot hear
a rapidly-stated "don't call".
That makes *any* kind of sensible respone useless.
The 3 magic tones played on *immediate* CID detection, followed by
any (useless) response other than a dial tone should be the default option.
Robert Baer
> The three tones referred to several times are
> the three tones associated with a disconnected
> or unavailable number message right?
* YES!
>
> Many teleservices companies use computerized
> callers that kill the number on the list when they
> pick that up. I have noticed that some of the
> auto callers that play canned messages
> respond to a 2 or 3 by reading out your phone
> number and announcing that it's being removed
> from their list. This sounds good but of
> course there is no way of knowing if they
> actually do.
* If they remove your number from their shitlist, that is all to the good.
>
> More and more I'm getting irked with
> faked caller ID.
* Tell me about it.
The worst is when the CID shows no number and no (useful) ID and the
caller uses a recorded message (and *NO* way to talk back).
>
> Script kiddies with Linux and some VOIP services
> are able to impersonate CID to look like anybody.
> I know of one geek who has used this to harass,
> order pizza, etc. and even used this to
> fake out the Police in other cities on the
> non emergency number. Real scumbag.
>
> Big teleservices call centers are more and more
> using their ISDN to present bogus CID as well.
> There are teleservices companies who use
> this option responsibly, but more and more are
> using it in a way that more closely resembles fraud.
>
> Ironically one of the best ways to unmask
> and ID the VOIP jerk is to use ISDN (or trunk?)
> which can access the system internal and not
> fakable counterpart of Caller ID.
>
> In THEORY the Police non emergency
> number could access this information
> rather than the bogus "presented" CID.
>
> Perhaps I'm just crabby about the
> caller ID fakery and longing to ID the
> VOIP caller ID fakery jerk.
>
> How impractical is it really for an individual
> or small business to have access to this
> internal and not fakable ID information?
* Verry interesting question, hopefully with a reasonable answer.
>
> Otherwise I like the idea of faking the
> three tone ""disconnected message""
> AND trying a long DTMF 2 and long DTMF 3
* What are these "long DTMF 2" and "long DTMF 3" signals?
>
> Happy new year!
Keith
Obama bin Laden's henchmen called my cell phone at least twenty times.
Trust me, I have no "business relationship" with them either.
Michael
>
> On Wed, 10 Dec 2008 11:55:15 -0700, Jim Thompson
> <To-Email-Use-Th...@My-Web-Site.com> wrote:
>
> [snip]
> >
> >With "kill" based on CID I just thought of another feature:
> >
> >At the 12th ring my phone rolls to voice mail. Set system for
> >allowing 11 rings for 800 numbers then "answer" (off hook for a few
> >seconds), prevents 800 crap in the voice mail ;-)
> >
> > ...Jim Thompson
>
> New thoughts...
>
> "Please hold for the next available agent.
>
> While you are waiting please listen carefully to the following
> choices:
>
> If you calling from a call center located outside the United States,
> stop deluding yourself that you live in an English-speaking country.
> You don't speak proper English! Hang up NOW!
>
> ..."
>
> Please add your thoughts ;-)
>
> ...Jim Thompson
I keep all phone ringers switched OFF all the time; answering machine picks op on ring #3 (it offers
no alternative number of rings, darn it) and plays "This is ###-####. Please leave a message."
Family and friends know that I monitor calls, holler (something like), "It's Joe. Pick up!", and
chatter to keep answering machine off-hook for the 15 seconds it takes me to winch my butt out of my
chair and get across the the room to the phone.
Telemarketers (pfffft! p-tooey!!) never say anything, so their calling don't affect me at all.
---
Michael
Michael
christofire wrote:
(snip)
>
> One might be excused for thinking that many of those located inside the
> United States (of America) 'don't speak proper English'.
>
> 'English US' ... sure!
>
> Chris
Well... ya know... I mean ... like, wha'cher point? ;-)
Americans: Tune in "News Hour" on PBS, listen to the long discussions and count the number of times
a guest's response begins with:
1) "Well"
2) "I mean"
3) "Ya know"
4) all of the above
---
Michael
Michael A. Terrell
I told them I was voting for the candidate who called me the least
number of times, and any time they woke me with a call, I counted it as
three.
Jim Thompson
Or, in Obama's case, "Uh... uh... uh............"
...Jim Thompson
--
| James E.Thompson, P.E. | mens |
| Analog Innovations, Inc. | et |
| Analog/Mixed-Signal ASIC's and Discrete Systems | manus |
| Phoenix, Arizona 85048 Skype: Contacts Only | |
| Voice:(480)460-2350 Fax: Available upon request | Brass Rat |
| E-mail Icon at http://www.analog-innovations.com | 1962 |
Postings via gmail, yahoo, hotmail, aioe, uar or googlegroups, and
wild-cross-posts are now automatically kill-filed using Agent v5.0
Michael A. Terrell
Jim Thompson wrote:
>
> On Thu, 01 Jan 2009 17:14:27 GMT, Michael <NoS...@att.net> wrote:
>
> >
> >
> >christofire wrote:
> >(snip)
> >>
> >> One might be excused for thinking that many of those located inside the
> >> United States (of America) 'don't speak proper English'.
> >>
> >> 'English US' ... sure!
> >>
> >> Chris
> >
> >Well... ya know... I mean ... like, wha'cher point? ;-)
> >
> >Americans: Tune in "News Hour" on PBS, listen to the long discussions and count the number of times
> >a guest's response begins with:
> >1) "Well"
> >2) "I mean"
> >3) "Ya know"
> >4) all of the above
> >
> >---
> >Michael
>
> Or, in Obama's case, "Uh... uh... uh............"
You left out: 'Corporate taxes will continue to increase, until
morale improves'.
o...@uakron.edu
card reader, writer. It doesn't use fat 32 which I see as a advantage
for this application. It makes all the card appear as a huge
sequential databuffer, but it does do block reads. So for four
dollars for a chip and crystal, and two dollars for a SD socket, plus
the SD card the local photo place was nlowing out for three bucks, you
have a heck of a capable memory. Since blacklisted or whitelisted
numbers go in, but don't go out, I see no reason to not just put them
on the card somewhat sequentially. This means you need a sorting
algorithm via exchange or area code, ie so the micro doesn't have go
look at all the possible blacklists (or whitelist)
The next building block would be say, AVRUSB, for the programing part.
I've had good luck using the AVR as a simple USB device, except on
certain Toshiba laptops, and even then, on the machines that dont
quite like atmel bit banged USB, inserting a powered hub between the
Atmel and the computer has cured the problem. This way the device
shows up as either a HID, or a serial device for programming, so you
could talk to it with hyperterminal.
So now you have a proposed memory system and a means to talk to it via
windows if needed.
refs:
www.obdev.at/products/avrusb/index.html
Circuit Cellar #221 DEC 2008 PG 33
The SD card sockets are available in small Qs from Sparkfun.com
Steve Roberts
Jim Thompson
We're getting closer!!
Thanks for the suggestions!
o...@uakron.edu
I'm trying to think of a way to divide up a 1 gig card so the
microcontroller can run a fast bubble sort. I am not a mathmatician.
I hate math. So I'm looking for a simple elegant way by dividing up
the virtual disk into "sectors with subsectors" to minimize search
times. It does no good for the micro to need more then 5 seconds to
search for a incoming number..
North American Numbering Plan.
Area codes:
(2-9)(0-8)(0-9) = 7 * 9 * 10 = 6300 simple directories on the
disk?
You have 8 million possible numbers per area code.
The Wiki (cringe) is here:
http://en.wikipedia.org/wiki/North_American_Numbering_Plan
It gets worse if the CID gives you country codes and overlays.
Do you just get the 10 digit dialing sequence or is it worse? Do
locals only show up as XXX-NNNN without the area code? I don't know, I
don't have CID, and where I worked before had a PBX with a complex
display system.
Something to think about!
Steve Roberts
Frank Buss
> Possible Sorting structure. 1 Gbyte SD
> I'm trying to think of a way to divide up a 1 gig card so the
> microcontroller can run a fast bubble sort. I am not a mathmatician.
> I hate math. So I'm looking for a simple elegant way by dividing up
> the virtual disk into "sectors with subsectors" to minimize search
> times. It does no good for the micro to need more then 5 seconds to
> search for a incoming number..
If you just want to search for a number, use a binary search algorithm. For
sorting big arrays, bubble sort is terrible, because you need O(n^2) steps
and it needs many reads and writes, which is very slow for SD cards. Use
quick sort.
BTW: It's not good to hate math for electronics and programming. I don't
know much about math, but I like it, e.g. see my last paper and source code
for calculating the magnetic field:
http://www.frank-buss.de/magnetfeld/index.html (sorry, it is in German)
--
Frank Buss, f...@frank-buss.de
http://www.frank-buss.de, http://www.it4-systems.de
o...@uakron.edu
Steve
krw
wrote:
>o...@uakron.edu wrote:
>
>> Possible Sorting structure. 1 Gbyte SD
>> I'm trying to think of a way to divide up a 1 gig card so the
>> microcontroller can run a fast bubble sort. I am not a mathmatician.
>> I hate math. So I'm looking for a simple elegant way by dividing up
>> the virtual disk into "sectors with subsectors" to minimize search
>> times. It does no good for the micro to need more then 5 seconds to
>> search for a incoming number..
>
>If you just want to search for a number, use a binary search algorithm. For
>sorting big arrays, bubble sort is terrible, because you need O(n^2) steps
>and it needs many reads and writes, which is very slow for SD cards. Use
>quick sort.
Unless there is a good chance your data is already sorted, which it
often is. In this case, a bubble sort isn't all that bad.
Jim Thompson
And some special cases: area codes... 800, 888, 877 & 866 and planned
expansion to 855, 844, 833 & 822, should be blanket-blocked.
I'd also blanket-block any "Unavailable" or "Out of Area" calls as
well.
Those, alone, would trim down a lot of the pain ;-)
Frank Buss
> Unless there is a good chance your data is already sorted, which it
> often is. In this case, a bubble sort isn't all that bad.
If it is already sorted, bubble sort is still a bad idea for inserting new
items, because you still need many read and writes. If new entries needs to
be added on a SD card, something like a balanced tree would be better.
krw
wrote:
>krw wrote:
>
>> Unless there is a good chance your data is already sorted, which it
>> often is. In this case, a bubble sort isn't all that bad.
>
>If it is already sorted, bubble sort is still a bad idea for inserting new
>items, because you still need many read and writes. If new entries needs to
>be added on a SD card, something like a balanced tree would be better.
True. My point was that the possibility shouln't be ignored just
because it was the first sort most have done and considered
"inelegant" by the script kiddies. It's still useful (and simple ;).
Robert Baer
(10 digits) if out of area; gives only number (7 digits) if in area.
For the whitelist, it would seem an allocation of 128 locations would
be sufficent; for eXplicit blacklist, nominally zero locations are
needed (think about it).