a way to have unlimited local calling

I was thinking (smoke rising)~~~ if I had sprint service~~~. Now you can
add lines to your package at no charge and I am sighned up for the
pcs2pcs free pkg. I could patch a second cell phone line through my home
phone.

So I buy a second phone and add it to my service for free. This phone has
auto answer while head set is plugged in. Set auto answer to 5 sec.Then
connect the mike and earphone line to a matching network with a dtmf
decoder to control the "off hook" mode of my land line. Now I call from
my main cell phone to my second cell phone and enter my code I now hear a
dial tone from my land line. I can now place a local call via my free
pcs2pcs plan through my home phone.

I just ordered a grab bag of audio matching transformers(surplus)$5.00
and a dtmf decoder that has up to a 50 digit programable code with an
output of a "spst" relay apx.$40.00.

I will start building the setup this week and I will post my test results
here.

I don't think this method is not restricted to sprint pcs. It should work
with any service with free phone to phone packages. Also a phone with
"auto answer" feature and capable of using a standard headset to connect
the audio.

I know I can't be the first person to think of this ;>

Bubba

---

› See More: a way to have unlimited local calling

As long as it's a local call within your landline's area anyway.

Do you really use that many minutes?

Scotty



"bubba" <[email protected]> wrote in message
news:[email protected]...
> I was thinking (smoke rising)~~~ if I had sprint service~~~. Now you can
> add lines to your package at no charge and I am sighned up for the
> pcs2pcs free pkg. I could patch a second cell phone line through my home
> phone.
>
> So I buy a second phone and add it to my service for free. This phone has
> auto answer while head set is plugged in. Set auto answer to 5 sec.Then
> connect the mike and earphone line to a matching network with a dtmf
> decoder to control the "off hook" mode of my land line. Now I call from
> my main cell phone to my second cell phone and enter my code I now hear a
> dial tone from my land line. I can now place a local call via my free
> pcs2pcs plan through my home phone.
>
> I just ordered a grab bag of audio matching transformers(surplus)$5.00
> and a dtmf decoder that has up to a 50 digit programable code with an
> output of a "spst" relay apx.$40.00.
>
> I will start building the setup this week and I will post my test results
> here.
>
> I don't think this method is not restricted to sprint pcs. It should work
> with any service with free phone to phone packages. Also a phone with
> "auto answer" feature and capable of using a standard headset to connect
> the audio.
>
> I know I can't be the first person to think of this ;>
>
> Bubba

"Scott Nelson - Wash DC" <[email protected]> wrote in message news:<[email protected]>...
> As long as it's a local call within your landline's area anyway.
>
> Do you really use that many minutes?
>
> Scotty
>
>
>
> "bubba" <[email protected]> wrote in message
> news:[email protected]...
> > I was thinking (smoke rising)~~~ if I had sprint service~~~. Now you can
> > add lines to your package at no charge and I am sighned up for the
> > pcs2pcs free pkg. I could patch a second cell phone line through my home
> > phone.
> >
> > So I buy a second phone and add it to my service for free. This phone has
> > auto answer while head set is plugged in. Set auto answer to 5 sec.Then
> > connect the mike and earphone line to a matching network with a dtmf
> > decoder to control the "off hook" mode of my land line. Now I call from
> > my main cell phone to my second cell phone and enter my code I now hear a
> > dial tone from my land line. I can now place a local call via my free
> > pcs2pcs plan through my home phone.
> >
> > I just ordered a grab bag of audio matching transformers(surplus)$5.00
> > and a dtmf decoder that has up to a 50 digit programable code with an
> > output of a "spst" relay apx.$40.00.
> >
> > I will start building the setup this week and I will post my test results
> > here.
> >
> > I don't think this method is not restricted to sprint pcs. It should work
> > with any service with free phone to phone packages. Also a phone with
> > "auto answer" feature and capable of using a standard headset to connect
> > the audio.
> >
> > I know I can't be the first person to think of this ;>
> >
> > Bubba

There is a simplier way, if you can get one of the services with free
incoming service.There are devices still available I believe, which
are remotely programmable to forward a call, usuing 3way on the
landline.

You use a minute of time to cal the landline forward device number,
have it call the cell phone as a free incoming call; then you and use
the device to call whoever you want--the one I used inthe early 90 had
a 12 minute time out, had to press a touch tone key to reset for
another 12 minutes--at he time the bel south foklks offered a
unlimmited incoming plan--I ended it about 3 years ago when cell rates
began to get so cheap.

bubba wrote:
> I was thinking (smoke rising)~~~ if I had sprint service~~~. Now you can
> add lines to your package at no charge and I am sighned up for the
> pcs2pcs free pkg. I could patch a second cell phone line through my home
> phone.



> I just ordered a grab bag of audio matching transformers(surplus)$5.00
> and a dtmf decoder that has up to a 50 digit programable code with an
> output of a "spst" relay apx.$40.00.



> I don't think this method is not restricted to sprint pcs. It should work
> with any service with free phone to phone packages. Also a phone with
> "auto answer" feature and capable of using a standard headset to connect
> the audio.
>
> I know I can't be the first person to think of this ;>
>
> Bubba

Nope...you're not.

I built several units just to try out - not realy good with a TDMA
carrier such as Cingular or AT&T because of the inherent delay as
the speech compressor circuit does its thing. Try this out - call
someone with a TDMA phone in the same room as you. There is a second
or so delay before they hear your voice on the telephone.

I used a 8051 microcontroller with mosfet bilateral analog switches
to simulate the keypad closures and an LCD interface.

Haver't bothered trying with a Sprint pone. I guess I could as I
have several spares laying around.

JRW wrote:
> Haver't bothered trying with a Sprint pone. I guess I could as I
> have several spares laying around.
>

Also did one for Nextel's FIMF. You would dial your home number or
whatever number you used with my unit connected to it. When it
answered, you dialed your target number then hung up. The unit
would dial your target number and three-way the call to you.

For AT&T (they've since dropped this plan), you could get free
calls to a designated number, I belive it was the home number
on your account. Dial that number, punch in your target number
and the unit would stored and forward-dialed the number and
then flash for a three way the call.

"Scott Nelson - Wash DC" <[email protected]> wrote in
news:[email protected]:

> As long as it's a local call within your landline's area anyway.
>
> Do you really use that many minutes?
>
> Scotty


Yes I have the 2000 min plan and while on the road to and from other
service calls I give tech support over the phone :> (driving for
dollars). I can use 90+ min. a day.
Oh and my SO has a shared phone on the plan and she like to talk to her
mother long distance :<

drx

>
>
> "bubba" <[email protected]> wrote in message
> news:[email protected]...
>> I was thinking (smoke rising)~~~ if I had sprint service~~~. Now you
>> can add lines to your package at no charge and I am sighned up for
>> the pcs2pcs free pkg. I could patch a second cell phone line through
>> my home phone.
>>
>> So I buy a second phone and add it to my service for free. This phone
>> has auto answer while head set is plugged in. Set auto answer to 5
>> sec.Then connect the mike and earphone line to a matching network
>> with a dtmf decoder to control the "off hook" mode of my land line.
>> Now I call from my main cell phone to my second cell phone and enter
>> my code I now hear a dial tone from my land line. I can now place a
>> local call via my free pcs2pcs plan through my home phone.
>>
>> I just ordered a grab bag of audio matching
>> transformers(surplus)$5.00 and a dtmf decoder that has up to a 50
>> digit programable code with an output of a "spst" relay apx.$40.00.
>>
>> I will start building the setup this week and I will post my test
>> results here.
>>
>> I don't think this method is not restricted to sprint pcs. It should
>> work with any service with free phone to phone packages. Also a phone
>> with "auto answer" feature and capable of using a standard headset to
>> connect the audio.
>>
>> I know I can't be the first person to think of this ;>
>>
>> Bubba
>
>

Here is the link to one of the commercial forwarding devices:


http://www.woodtel.com/dialmate.htm



The Deal is you need a cell phone with unlimited incoming calls; you
burn 1 call to call the device, then have it call you back, you can
then control outgoing calls from the device from the landline ie, the
unlimited calls will actually be made from your landline. I think the
basic instructions are on the webpage

AS I mentioned, I used a similar device for years, but with cell rates
so low, I am not sure it's worth the trouble now ---as even then I
only used maybe a 1000 minutes pre month--but cell rates were double
or more higher 10 years ago.


[email protected] (plane) wrote in message news:<[email protected]>...
> "Scott Nelson - Wash DC" <[email protected]> wrote in message news:<[email protected]>...
> > As long as it's a local call within your landline's area anyway.
> >
> > Do you really use that many minutes?
> >
> > > > >
> > > I don't think this method is not restricted to sprint pcs. It should work
> > > with any service with free phone to phone packages. Also a phone with
> > > "auto answer" feature and capable of using a standard headset to connect
> > > the audio.
> > >
> > > I know I can't be the first person to think of this ;>
> > >
> > > Bubba
>
> There is a simplier way, if you can get one of the services with free
> incoming service.There are devices still available I believe, which
> are remotely programmable to forward a call, usuing 3way on the
> landline.
>
> You use a minute of time to cal the landline forward device number,
> have it call the cell phone as a free incoming call; then you and use
> the device to call whoever you want--the one I used inthe early 90 had
> a 12 minute time out, had to press a touch tone key to reset for
> another 12 minutes--at he time the bel south foklks offered a
> unlimmited incoming plan--I ended it about 3 years ago when cell rates
> began to get so cheap.

bubba wrote:

> I was thinking (smoke rising)~~~ if I had sprint service~~~. Now you can
> add lines to your package at no charge and I am sighned up for the
> pcs2pcs free pkg. I could patch a second cell phone line through my home
> phone.

I haven't pursued the idea very far with my Sprint phone as I don't
use that many daytime minutes. I only went as far as to prove it could
be done - it was no trivial task.

To demonstrate this...have someone call you on your Sprint phone
and ask them to very slowly dial some numbers to you. The tones
you hear will be very skewed and not decodable with a DTMF chip.

I had to use my Linux computer connected to my other Sprint phone
to decode the DTMF tones with a FFT (Fast Fourier Transform) program.
A simple $2.00 DTMF decoder chip like the SSI 201 simply can't decode
the tones.

"JRW" <no_addy@no_.com> wrote in message =
news:[email protected]...
>=20
=20
> To demonstrate this...have someone call you on your Sprint phone
> and ask them to very slowly dial some numbers to you. The tones
> you hear will be very skewed and not decodable with a DTMF chip.
>=20
> I had to use my Linux computer connected to my other Sprint phone
> to decode the DTMF tones with a FFT (Fast Fourier Transform) program.
> A simple $2.00 DTMF decoder chip like the SSI 201 simply can't decode
> the tones.
>=20
>=20
The main point being that the vocoder in the CDMA phone distorts tones
as it reconstitutes audio, not that the phones *send* distorted DTMF =
tones.

90% of the readers probably understood that,
but I didn't want Phillipe to seize on something more to gripe about. =
:-)
---JRC---

"John R. Copeland" <[email protected]> wrote in
news:[email protected]:

>
> "JRW" <no_addy@no_.com> wrote in message
> news:[email protected]...
>>
>
>> To demonstrate this...have someone call you on your Sprint phone
>> and ask them to very slowly dial some numbers to you. The tones
>> you hear will be very skewed and not decodable with a DTMF chip.
>>
>> I had to use my Linux computer connected to my other Sprint phone
>> to decode the DTMF tones with a FFT (Fast Fourier Transform) program.
>> A simple $2.00 DTMF decoder chip like the SSI 201 simply can't decode
>> the tones.
>>
>>
> The main point being that the vocoder in the CDMA phone distorts tones
> as it reconstitutes audio, not that the phones *send* distorted DTMF
> tones.
>
> 90% of the readers probably understood that,
> but I didn't want Phillipe to seize on something more to gripe about.
> :-) ---JRC---
>
>
I changed my security to a "caller IDed ringtone" to answer the second
cell phone. A tone downloaded to the phone that is assoc. with the firsts
cell phones called ID. Only when the unique ringer is heard a small sel.
will push the answer button the phone. This will insure only my cell will
be able to use the setup.

I had no problem dialing out when I just coupled the second cell phone to
the land line via "audio coupling" the headset to the phone handset.
I just taped the land line mic. to the cell phone ear plug and the land
line was taped to cell mic. I called my second land line and it rang

I will start building a simple cir. this weekend and know for sure.

I don't expect it to cost more than 15 bucks for the entire project :>

drx

bubba wrote:
> I had no problem dialing out when I just coupled the second cell phone to
> the land line via "audio coupling" the headset to the phone handset.
> I just taped the land line mic. to the cell phone ear plug and the land
> line was taped to cell mic. I called my second land line and it rang

So you're saying the DTMF is sent from the "mobile" phone to the
"fixed" and the received DTMF audio goes on into the central office
DTMF decoders?

I suppose its entirely possible under ideal conditions, that the DTMF
heard in "fixed" phone's handset might be clear enough to dial a number.

Its been my experience to have never had an ideal condition.

JRW <no_addy@no_.com> wrote in
news:[email protected]:

> bubba wrote:
>> I had no problem dialing out when I just coupled the second cell
>> phone to the land line via "audio coupling" the headset to the phone
>> handset. I just taped the land line mic. to the cell phone ear plug
>> and the land line was taped to cell mic. I called my second land line
>> and it rang
>
> So you're saying the DTMF is sent from the "mobile" phone to the
> "fixed" and the received DTMF audio goes on into the central office
> DTMF decoders?
>
> I suppose its entirely possible under ideal conditions, that the DTMF
> heard in "fixed" phone's handset might be clear enough to dial a
> number.
>
> Its been my experience to have never had an ideal condition.
>
>

1st cell phone calling second cell phone(free cell to cell) and second
cell phone coupled to the land line(unlimited local calling). I will
verify this tonight. Yes I am only using telco's dtmf decoder. I would
think a DMS100 would have a very good decoder.

Add 20 bucks a month to my land line service and I can have unlimited
long distance also! (here I go thinking again)

drx

bubba wrote:
> I would think a DMS100 would have a very good decoder.

No different than any other telco register. If it meets specs,
it meets specs.