Dialer problem with a picchip

L

lerameur

Guest
Hello,

I have a recuring problem when connecting my circuit to the phone
line.
basically the circuit I use is :
http://ourworld.compuserve.com/homepages/Bill_Bowden/autocall.htm
with the exception that I connect B3 to an 8th order low pass filter
and the output of that goes to the positive of the transformer. Also I
use picbasic to create my DTMF. I connected a small audio speaker to
the terminal of the phone line along with the the line itself.
The problem is as follows, when the relay is energize, I hear a dial
tone ( well thats good) , then I also hear the controller dialing..
both at the same time, so the number is never really dialed, anybody
know why?

K
 
lerameur wrote:

Hello,

I have a recuring problem when connecting my circuit to the phone
line.
basically the circuit I use is :
http://ourworld.compuserve.com/homepages/Bill_Bowden/autocall.htm
with the exception that I connect B3 to an 8th order low pass filter
and the output of that goes to the positive of the transformer. Also I
use picbasic to create my DTMF. I connected a small audio speaker to
the terminal of the phone line along with the the line itself.
The problem is as follows, when the relay is energize, I hear a dial
tone ( well thats good) , then I also hear the controller dialing..
both at the same time, so the number is never really dialed, anybody
know why?

K
Well, from what you're saying and what I see on that sight, I would
Click to expand...
say that some how you have hacked it and not removed the actual
rotary pulse dialing code out of it?

http://webpages.charter.net/jamie_5"
 
Jamie wrote:

lerameur wrote:

I have a recuring problem when connecting my circuit to the phone
line.
basically the circuit I use is :
http://ourworld.compuserve.com/homepages/Bill_Bowden/autocall.htm
with the exception that I connect B3 to an 8th order low pass filter
and the output of that goes to the positive of the transformer. Also I
use picbasic to create my DTMF. I connected a small audio speaker to
the terminal of the phone line along with the the line itself.
The problem is as follows, when the relay is energize, I hear a dial
tone ( well thats good) , then I also hear the controller dialing..
both at the same time, so the number is never really dialed, anybody
know why?

Well, from what you're saying and what I see on that sight, I would
say that some how you have hacked it and not removed the actual
rotary pulse dialing code out of it?
Click to expand...
Looks suspiciously like it. At first sight I though he was intentially
trying to send dial pulses.

Graham
 
lerameur wrote:
On Aug 31, 6:40 pm, Eeyore <rabbitsfriendsandrelati...@hotmail.com
wrote:

Jamie wrote:

lerameur wrote:

I have a recuring problem when connecting my circuit to the phone
line.
basically the circuit I use is :
http://ourworld.compuserve.com/homepages/Bill_Bowden/autocall.htm
with the exception that I connect B3 to an 8th order low pass filter
and the output of that goes to the positive of the transformer. Also I
use picbasic to create my DTMF. I connected a small audio speaker to
the terminal of the phone line along with the the line itself.
The problem is as follows, when the relay is energize, I hear a dial
tone ( well thats good) , then I also hear the controller dialing..
both at the same time, so the number is never really dialed, anybody
know why?

Well, from what you're saying and what I see on that sight, I would
say that some how you have hacked it and not removed the actual
rotary pulse dialing code out of it?

Looks suspiciously like it. At first sight I though he was intentially
trying to send dial pulses.

Graham


I am just using the diagram on that web site. That is it, no program
no nothing else.
Ok that said, I modified the hardware because I am using DTMFout in
picbasic that produces the dialing., I just added a max7480 to filter
out the noise because the signal get to the audio transformer.

k
Maybe you're over driving the line?
Click to expand...


--
"I'd rather have a bottle in front of me than a frontal lobotomy"

"Daily Thought:

SOME PEOPLE ARE LIKE SLINKIES. NOT REALLY GOOD FOR ANYTHING BUT
THEY BRING A SMILE TO YOUR FACE WHEN PUSHED DOWN THE STAIRS.
http://webpages.charter.net/jamie_5"
 
lerameur wrote:

On Aug 31, 7:34 pm, Jamie
jamie_ka1lpa_not_valid_after_ka1l...@charter.net> wrote:

lerameur wrote:

On Aug 31, 6:40 pm, Eeyore <rabbitsfriendsandrelati...@hotmail.com
wrote:

Jamie wrote:

lerameur wrote:

I have a recuring problem when connecting my circuit to the phone
line.
basically the circuit I use is :
http://ourworld.compuserve.com/homepages/Bill_Bowden/autocall.htm
with the exception that I connect B3 to an 8th order low pass filter
and the output of that goes to the positive of the transformer. Also I
use picbasic to create my DTMF. I connected a small audio speaker to
the terminal of the phone line along with the the line itself.
The problem is as follows, when the relay is energize, I hear a dial
tone ( well thats good) , then I also hear the controller dialing..
both at the same time, so the number is never really dialed, anybody
know why?

Well, from what you're saying and what I see on that sight, I would
say that some how you have hacked it and not removed the actual
rotary pulse dialing code out of it?

Looks suspiciously like it. At first sight I though he was intentially
trying to send dial pulses.

Graham

I am just using the diagram on that web site. That is it, no program
no nothing else.
Ok that said, I modified the hardware because I am using DTMFout in
picbasic that produces the dialing., I just added a max7480 to filter
out the noise because the signal get to the audio transformer.

k

Maybe you're over driving the line?



Meaning ?

K
Try disconnection the audio feed to the xformer from the chip and let it
Click to expand...
go through the process.
See if then, it is causing the problem. If it does not cause the line
to reset, then you know you have an over driving issue.

Also, look at the quality of the signal on the line side using a
scope.


http://webpages.charter.net/jamie_5"
 
On Aug 31, 6:40 pm, Eeyore <rabbitsfriendsandrelati...@hotmail.com>
wrote:
Jamie wrote:
lerameur wrote:

I have a recuring problem when connecting my circuit to the phone
line.
basically the circuit I use is :
http://ourworld.compuserve.com/homepages/Bill_Bowden/autocall.htm
with the exception that I connect B3 to an 8th order low pass filter
and the output of that goes to the positive of the transformer. Also I
use picbasic to create my DTMF.  I connected a small audio speaker to
the terminal of the phone line along with the the line itself.
The problem is as follows, when the relay is energize, I hear a dial
tone ( well thats good) , then I also hear the controller dialing..
both at the same time, so the number is never really dialed, anybody
know why?

Well, from what you're saying and what I see on that sight, I would
say that some how you have hacked it and not removed the actual
rotary pulse dialing code out of it?

Looks suspiciously like it. At first sight I though he was intentially
trying to send dial pulses.

Graham
Click to expand...
I am just using the diagram on that web site. That is it, no program
no nothing else.
Ok that said, I modified the hardware because I am using DTMFout in
picbasic that produces the dialing., I just added a max7480 to filter
out the noise because the signal get to the audio transformer.

k
 
On Aug 31, 7:34 pm, Jamie
<jamie_ka1lpa_not_valid_after_ka1l...@charter.net> wrote:
lerameur wrote:
On Aug 31, 6:40 pm, Eeyore <rabbitsfriendsandrelati...@hotmail.com
wrote:

Jamie wrote:

lerameur wrote:

I have a recuring problem when connecting my circuit to the phone
line.
basically the circuit I use is :
http://ourworld.compuserve.com/homepages/Bill_Bowden/autocall.htm
with the exception that I connect B3 to an 8th order low pass filter
and the output of that goes to the positive of the transformer. Also I
use picbasic to create my DTMF.  I connected a small audio speaker to
the terminal of the phone line along with the the line itself.
The problem is as follows, when the relay is energize, I hear a dial
tone ( well thats good) , then I also hear the controller dialing..
both at the same time, so the number is never really dialed, anybody
know why?

Well, from what you're saying and what I see on that sight, I would
say that some how you have hacked it and not removed the actual
rotary pulse dialing code out of it?

Looks suspiciously like it. At first sight I though he was intentially
trying to send dial pulses.

Graham

I am just using the diagram on that web site. That is it, no program
no nothing else.
Ok that said, I modified the hardware because I am using DTMFout in
picbasic that produces the dialing., I just added a max7480 to filter
out the noise because the signal get to the audio transformer.

k

Maybe you're over driving the line?
Click to expand...
Meaning ?

K
 
On Aug 31, 4:41 pm, lerameur <leram...@yahoo.com> wrote:
Hello,

I have a recuring problem when connecting my circuit to the phone
line.
basically the circuit I use is :http://ourworld.compuserve.com/homepages/Bill_Bowden/autocall.htm
with the exception that I connect B3 to an 8th order low pass filter
and the output of that goes to the positive of the transformer. Also I
use picbasic to create my DTMF. I connected a small audio speaker to
the terminal of the phone line along with the the line itself.
The problem is as follows, when the relay is energize, I hear a dial
tone ( well thats good) , then I also hear the controller dialing..
both at the same time, so the number is never really dialed, anybody
know why?

K
Click to expand...
If the CO is detecting DTMF, dial tone will stop.

Some POTS lines won't pass DTMF if T/R are reversed. Levels (too
high, often) & distortion can hurt DTMF detection. Digit-on or inter-
digit time might be too short; send just 1 digit & see if DT stops.

JM
 
On Aug 31, 6:06 pm, lerameur <leram...@yahoo.com> wrote:
On Aug 31, 6:40 pm, Eeyore <rabbitsfriendsandrelati...@hotmail.com
wrote:



Jamie wrote:
lerameur wrote:

I have a recuring problem when connecting my circuit to the phone
line.
basically the circuit I use is :
http://ourworld.compuserve.com/homepages/Bill_Bowden/autocall.htm
with the exception that I connect B3 to an 8th order low pass filter
and the output of that goes to the positive of the transformer. Also I
use picbasic to create my DTMF. I connected a small audio speaker to
the terminal of the phone line along with the the line itself.
The problem is as follows, when the relay is energize, I hear a dial
tone ( well thats good) , then I also hear the controller dialing..
both at the same time, so the number is never really dialed, anybody
know why?

Well, from what you're saying and what I see on that sight, I would
say that some how you have hacked it and not removed the actual
rotary pulse dialing code out of it?

Looks suspiciously like it. At first sight I though he was intentially
trying to send dial pulses.

Graham

I am just using the diagram on that web site. That is it, no program
no nothing else.
Ok that said, I modified the hardware because I am using DTMFout in
picbasic that produces the dialing., I just added a max7480 to filter
out the noise because the signal get to the audio transformer.

k
Click to expand...
You might want to post your ACTUAL circuit & ACTUAL program, if you
want to get ACTUAL good answers. Posting an example of what it ISN'T,
isn't necessarily going to get you what you want.

JM
 
On Aug 31, 7:33 pm, John Mianowski <spamf...@skytex.net> wrote:
On Aug 31, 6:06 pm, lerameur <leram...@yahoo.com> wrote:



On Aug 31, 6:40 pm, Eeyore <rabbitsfriendsandrelati...@hotmail.com
wrote:

Jamie wrote:
lerameur wrote:

I have a recuring problem when connecting my circuit to the phone
line.
basically the circuit I use is :
http://ourworld.compuserve.com/homepages/Bill_Bowden/autocall.htm
with the exception that I connect B3 to an 8th order low pass filter
and the output of that goes to the positive of the transformer. Also I
use picbasic to create my DTMF.  I connected a small audio speaker to
the terminal of the phone line along with the the line itself.
The problem is as follows, when the relay is energize, I hear a dial
tone ( well thats good) , then I also hear the controller dialing...
both at the same time, so the number is never really dialed, anybody
know why?

Well, from what you're saying and what I see on that sight, I would
say that some how you have hacked it and not removed the actual
rotary pulse dialing code out of it?

Looks suspiciously like it. At first sight I though he was intentially
trying to send dial pulses.

Graham

I am just using the diagram on that web site. That is it, no program
no nothing else.
Ok that said, I modified the hardware because I am using DTMFout in
picbasic that produces the dialing., I just added a max7480 to filter
out the noise because the signal get to the audio transformer.

k

You might want to post your ACTUAL circuit & ACTUAL program, if you
want to get ACTUAL good answers.  Posting an example of what it ISN'T,
isn't necessarily going to get you what you want.

JM
Click to expand...
Ok I will make a schematic.
I look in my pspice but I dont have anypic chip or the max7480 IC.
Anyone know of a program that contains most of the IC s out there?
without being a simulation software.
 
On Aug 31, 7:59 pm, lerameur <leram...@yahoo.com> wrote:
On Aug 31, 7:33 pm, John Mianowski <spamf...@skytex.net> wrote:



On Aug 31, 6:06 pm, lerameur <leram...@yahoo.com> wrote:

On Aug 31, 6:40 pm, Eeyore <rabbitsfriendsandrelati...@hotmail.com
wrote:

Jamie wrote:
lerameur wrote:

I have a recuring problem when connecting my circuit to the phone
line.
basically the circuit I use is :
http://ourworld.compuserve.com/homepages/Bill_Bowden/autocall.htm
with the exception that I connect B3 to an 8th order low pass filter
and the output of that goes to the positive of the transformer. Also I
use picbasic to create my DTMF.  I connected a small audio speaker to
the terminal of the phone line along with the the line itself.
The problem is as follows, when the relay is energize, I hear a dial
tone ( well thats good) , then I also hear the controller dialing..
both at the same time, so the number is never really dialed, anybody
know why?

Well, from what you're saying and what I see on that sight, I would
say that some how you have hacked it and not removed the actual
rotary pulse dialing code out of it?

Looks suspiciously like it. At first sight I though he was intentially
trying to send dial pulses.

Graham

I am just using the diagram on that web site. That is it, no program
no nothing else.
Ok that said, I modified the hardware because I am using DTMFout in
picbasic that produces the dialing., I just added a max7480 to filter
out the noise because the signal get to the audio transformer.

k

You might want to post your ACTUAL circuit & ACTUAL program, if you
want to get ACTUAL good answers.  Posting an example of what it ISN'T,
isn't necessarily going to get you what you want.

JM

Ok I will make a schematic.
I look in my pspice but I dont have anypic chip or the max7480 IC.
Anyone know of a program that contains most of the IC s out there?
without being a simulation software.
Click to expand...
I got the circuit working now, the odd thing it works only when I put
the speaker (9 Ohms) on the transformer, The positive on the positive
of the dtmf input and the ground on the phone ground.
I guess that means it is not getting enough current in.... ?

K
 
On Sep 1, 4:55 pm, lerameur <leram...@yahoo.com> wrote:
On Aug 31, 7:59 pm, lerameur <leram...@yahoo.com> wrote:



On Aug 31, 7:33 pm, John Mianowski <spamf...@skytex.net> wrote:

On Aug 31, 6:06 pm, lerameur <leram...@yahoo.com> wrote:

On Aug 31, 6:40 pm, Eeyore <rabbitsfriendsandrelati...@hotmail.com
wrote:

Jamie wrote:
lerameur wrote:

I have a recuring problem when connecting my circuit to the phone
line.
basically the circuit I use is :
http://ourworld.compuserve.com/homepages/Bill_Bowden/autocall.htm
with the exception that I connect B3 to an 8th order low pass filter
and the output of that goes to the positive of the transformer. Also I
use picbasic to create my DTMF.  I connected a small audio speaker to
the terminal of the phone line along with the the line itself..
The problem is as follows, when the relay is energize, I hear a dial
tone ( well thats good) , then I also hear the controller dialing..
both at the same time, so the number is never really dialed, anybody
know why?

Well, from what you're saying and what I see on that sight, I would
say that some how you have hacked it and not removed the actual
rotary pulse dialing code out of it?

Looks suspiciously like it. At first sight I though he was intentially
trying to send dial pulses.

Graham

I am just using the diagram on that web site. That is it, no program
no nothing else.
Ok that said, I modified the hardware because I am using DTMFout in
picbasic that produces the dialing., I just added a max7480 to filter
out the noise because the signal get to the audio transformer.

k

You might want to post your ACTUAL circuit & ACTUAL program, if you
want to get ACTUAL good answers.  Posting an example of what it ISN'T,
isn't necessarily going to get you what you want.

JM

Ok I will make a schematic.
I look in my pspice but I dont have anypic chip or the max7480 IC.
Anyone know of a program that contains most of the IC s out there?
without being a simulation software.

I got the circuit working now, the odd thing it works only when I put
the speaker (9 Ohms) on the transformer, The positive on the positive
of the dtmf input and the ground on the phone ground.
I guess that means it is not getting enough current in.... ?

K
Click to expand...
here is the diagram.
It do not dial without the 9 Ohm resistor...

K
 
On Sep 1, 4:55 pm, lerameur <leram...@yahoo.com> wrote:
On Aug 31, 7:59 pm,lerameur<leram...@yahoo.com> wrote:



On Aug 31, 7:33 pm, John Mianowski <spamf...@skytex.net> wrote:

On Aug 31, 6:06 pm,lerameur<leram...@yahoo.com> wrote:

On Aug 31, 6:40 pm, Eeyore <rabbitsfriendsandrelati...@hotmail.com
wrote:

Jamie wrote:
lerameurwrote:

I have a recuring problem when connecting my circuit to the phone
line.
basically the circuit I use is :
http://ourworld.compuserve.com/homepages/Bill_Bowden/autocall.htm
with the exception that I connect B3 to an 8th order low pass filter
and the output of that goes to the positive of the transformer. Also I
use picbasic to create my DTMF.  I connected a small audio speaker to
the terminal of the phone line along with the the line itself..
The problem is as follows, when the relay is energize, I hear a dial
tone ( well thats good) , then I also hear the controller dialing..
both at the same time, so the number is never really dialed, anybody
know why?

Well, from what you're saying and what I see on that sight, I would
say that some how you have hacked it and not removed the actual
rotary pulse dialing code out of it?

Looks suspiciously like it. At first sight I though he was intentially
trying to send dial pulses.

Graham

I am just using the diagram on that web site. That is it, no program
no nothing else.
Ok that said, I modified the hardware because I am using DTMFout in
picbasic that produces the dialing., I just added a max7480 to filter
out the noise because the signal get to the audio transformer.

k

You might want to post your ACTUAL circuit & ACTUAL program, if you
want to get ACTUAL good answers.  Posting an example of what it ISN'T,
isn't necessarily going to get you what you want.

JM

Ok I will make a schematic.
I look in my pspice but I dont have anypic chip or the max7480 IC.
Anyone know of a program that contains most of the IC s out there?
without being a simulation software.

I got the circuit working now, the odd thing it works only when I put
the speaker (9 Ohms) on the transformer, The positive on the positive
of the dtmf input and the ground on the phone ground.
I guess that means it is not getting enough current in.... ?

K
Click to expand...
HI,

Here is the diagram.
It do not dial without the 9 Oh

m resistor...
http://www3.sympatico.ca/captoro/dialer.jpg
K
 
lerameur wrote:

On Sep 1, 4:55 pm, lerameur <leram...@yahoo.com> wrote:

On Aug 31, 7:59 pm,lerameur<leram...@yahoo.com> wrote:




On Aug 31, 7:33 pm, John Mianowski <spamf...@skytex.net> wrote:

On Aug 31, 6:06 pm,lerameur<leram...@yahoo.com> wrote:

On Aug 31, 6:40 pm, Eeyore <rabbitsfriendsandrelati...@hotmail.com
wrote:

Jamie wrote:

lerameurwrote:

I have a recuring problem when connecting my circuit to the phone
line.
basically the circuit I use is :
http://ourworld.compuserve.com/homepages/Bill_Bowden/autocall.htm
with the exception that I connect B3 to an 8th order low pass filter
and the output of that goes to the positive of the transformer. Also I
use picbasic to create my DTMF. I connected a small audio speaker to
the terminal of the phone line along with the the line itself.
The problem is as follows, when the relay is energize, I hear a dial
tone ( well thats good) , then I also hear the controller dialing..
both at the same time, so the number is never really dialed, anybody
know why?

Well, from what you're saying and what I see on that sight, I would
say that some how you have hacked it and not removed the actual
rotary pulse dialing code out of it?

Looks suspiciously like it. At first sight I though he was intentially
trying to send dial pulses.

Graham

I am just using the diagram on that web site. That is it, no program
no nothing else.
Ok that said, I modified the hardware because I am using DTMFout in
picbasic that produces the dialing., I just added a max7480 to filter
out the noise because the signal get to the audio transformer.

k

You might want to post your ACTUAL circuit & ACTUAL program, if you
want to get ACTUAL good answers. Posting an example of what it ISN'T,
isn't necessarily going to get you what you want.

JM

Ok I will make a schematic.
I look in my pspice but I dont have anypic chip or the max7480 IC.
Anyone know of a program that contains most of the IC s out there?
without being a simulation software.

I got the circuit working now, the odd thing it works only when I put
the speaker (9 Ohms) on the transformer, The positive on the positive
of the dtmf input and the ground on the phone ground.
I guess that means it is not getting enough current in.... ?

K


HI,

Here is the diagram.
It do not dial without the 9 Oh

m resistor...
http://www3.sympatico.ca/captoro/dialer.jpg
K
It's very obvious why it don't work as desired.
Click to expand...

You have no DC path on the line side to load it
down..
On the C connection, remove the cap and 150 ohm R and
connect it directly to the xformer.

Remove the 9 ohm R from where it is and if needed connect
it across C and D connections to add a load.
I don't know what you're using for a Xformer so I don't
know what the DC resistance is in the secondary of it how
ever, you need to proper DC resistance to bring the line
to a normal off hook voltage.

http://webpages.charter.net/jamie_5"
 
lerameur wrote:
Here is the diagram.
http://www3.sympatico.ca/captoro/dialer.jpg
Click to expand...
1) When capturing a line drawing, DON"T use JPEG.
http://www.google.com/search?q=cache:b6q8ggynLcMJ:webdesign.about.com/od/graphics/a/aa100906.htm+better.compression+photographs-*-*-*-*-*-millions-of-colors+*-*-*-small-*-*-*+*-not-suited+*-*-*-*-*-*-*-royalty-*+*-blocks-of-*-color+Use-GIF-*+simple-shapes-*-crisp-edges+*-JPEG-images+not-*-suited-*-*+PNG.format+our+*-replacement-for-*-GIF-*+*-with-text+*-Explorer&strip=1

2) As Jamie noted, you don't even know the difference
(electrically) between on-hook and off-hook .
Picking up a book on basic telephony and learning the fundamentals
would be a good plan.

3) As Mianowski noted, to know what is happing at the other end,
you have to be able to *listen* to it.
Your regular old transformer won't do that well.
http://www.google.com/images?q=hybrid-transformer

Again, reading a book on the basics would be useful.
Characterizing *what exists* and determining an interface
should have come first.
Like so many folks, you started at the wrong end of the project
(like the guy that wanted to use rechargeable batteries to run LEDs
but didn't know what the *energy demand* would be
because he hadn't even picked a LED).
 
lerameur wrote:

Jamie wrote:

Maybe you're over driving the line?

Meaning ?
Click to expand...
Meaning putting too many volts onto the line. Have you read the specs for DTMF
dialling and know the correct levels ? You'll find them on the data sheets for
DTMF dialler chips (if you can still find one).

Graham
 
lerameur wrote:

I got the circuit working now, the odd thing it works only when I put
the speaker (9 Ohms) on the transformer,
Click to expand...
What speaker ? You haven't shown a circuit with a speaker AFAICS.

The positive on the positive
of the dtmf input and the ground on the phone ground.
I guess that means it is not getting enough current in.... ?
Click to expand...
No it's probably the speaker loading the signal level down to an acceptable level.

From memory you only need about 1 V of signal. You'll probably break the PIC if you
use it to drive 9 ohm louspeakers.

You seem to be attempting a challenging project for someone with so little basic
knowledge. Like building a house on sand foundations.

Graham
 
lerameur wrote:

Here is the diagram.
It do not dial without the 9 Oh

m resistor...
http://www3.sympatico.ca/captoro/dialer.jpg
Click to expand...
Almost certainly your voltage level is wrong initially.

Put a voltage divider between the PIC and the MAX 7480 to reduce the signal level. Try
about 20% of the PIC's output.

Graham
 
john jardine wrote:

"lerameur" <lerameur@yahoo.com> wrote in message

I have a recuring problem when connecting my circuit to the phone
line. basically the circuit I use is :
http://ourworld.compuserve.com/homepages/Bill_Bowden/autocall.htm
with the exception that I connect B3 to an 8th order low pass filter
and the output of that goes to the positive of the transformer. Also I
use picbasic to create my DTMF. I connected a small audio speaker to
the terminal of the phone line along with the the line itself.
The problem is as follows, when the relay is energize, I hear a dial
tone ( well thats good) , then I also hear the controller dialing..
both at the same time, so the number is never really dialed, anybody
know why?

"then I also hear the controller dialing..". From the write up, I thought
it -was- designed to pulse dial using the relay. No?
Click to expand...
Fooled me too !

Graham
 
On 9/3/08 6:27 AM, in article
ce68e9f5-20d4-49b3-aa09-bf9715408199@k13g2000hse.googlegroups.com,
"lerameur" <lerameur@yahoo.com> wrote:

On Sep 2, 10:43 pm, JeffM <jef...@email.com> wrote:
lerameurwrote:
Here is the diagram.
http://www3.sympatico.ca/captoro/dialer.jpg

1) When capturing a line drawing, DON"T use
JPEG.http://www.google.com/search?q=cache:b6q8ggynLcMJ:webdesign.about.com...

2) As Jamie noted, you don't even know the difference
(electrically) between on-hook and off-hook .

OK, you say so...


3) As Mianowski noted, to know what is happing at the other end,
you have to be able to *listen* to it.
Your regular old transformer won't do that
well.http://www.google.com/images?q=hybrid-transformer

Again, reading a book on the basics would be useful.

Ok which one? I bought two books and none of them go technical about
the frequencies of dial tone and busy signal,
Click to expand...
Typical for a "modern" office in the US and probably Canada, is a set of
signals called "Precise to signals:

Dial Tone: 350 Hz + 440 Hz, nominal maximum deviation +- 0.7% per
frequency.

Line Busy tone: 480 Hz + 620 Hz, nominal maximum deviation +- 1.5% per
frequency. Timing is 60 ipm, 0.5 sec on, 0.5 sec off, 10% tolerance on all
parameters.

Audible ringing tone: 440 Hz + 480 Hz, nominal maximum deviation +- 1.6%
per frequency.


and not even close to
giving out out the on /off hook voltage. which I found out another way
' On Hook: 40 to 50 VDC
Click to expand...
Nominal On Hook voltage will be 52V.

' Off Hook: 4 to 6 VDC
Click to expand...
Off hook voltage should never be less than about 6.6V, and it can be
considerably higher depending on the Telco serving arrangement including the
length of their cable pair. The DC circuit path provided by the "telephone
device" may have a resistance of 200 or 330 Ohms. The lower value may be
used by devices using DP signaling, and 330 Ohms may be used for tone
signaling devices. If your tone signaling device doesn't use Network loop
current, I suppose the DC path of your devise can be anywhere between the
two.

' Ringing: 100 VAC
Click to expand...
The most common ring signal is 20 Hz, +- 3 Hz with an AC magnitude (at the
NI) of 30 to 106 V rms superimposed on a DC voltage of less than 80 V.
Newest ring generators spec at 20 Hz +- 1 Hz.


I will keep using jpg, Gif can be animated which could be a potential
source of virus (which can prevent from people wanting to view the
file) and yes I have seen gif with virus .
Click to expand...
If you are designing a product for use by others, you need to assure it
conforms with the Federal Code of Regulations 47, Part 68, and that it gets
Registered.

http://www.fcc.gov/wcb/iatd/part_68.html

All the technical insight you require is available there.
 
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