Phone Call Counter

[Ian R. Adlon]

I am looking for a circuit that will count the number of incoming phone
calls. It should use two 7-segment LED displays to display the number of
calls that have come in.

 

[Bill Vajk]

Ian R. Adlon wrote:

I am looking for a circuit that will count the number of incoming phone
calls. It should use two 7-segment LED displays to display the number of
calls that have come in.

You need to be a bit more clear with your request. Do
you want to count the rings or the "off hook"
episodes? Neither gives you a precise "incoming
calls" count. Radio shack used to make a device
which monitored the phone line that served to
detect incoming calls (as an offhook after some
[# reported} rings including duration) and as what
is called a pen recorder which reports the outgoing
call number and the duration of the call, all printed
on a paper adding machine tape.

They may have a newer version.

There are some modems that collect Caller ID information
and process that to a file but they don't report whether
or not the call was answered.

 

[Jerry G.]

This is very difficult to do from a cell phone. You would need a receiver
that can ID your code set from the repeater. This would be like the front
end of a cell phone. Then there would be the decoding which is proprietary
to the phone company.

Your phone company should be able to provide you with detailed billing. All
the modern cell phones can display and remember up to at least 30 previous
calls. You should be able to configure this to show the number of calls,
dates, times in and out, and total times of each of the calls. Therefore
there is no real need for what you want to do.

Also, many phone companies offer a telephone traffic fax-back service. In
our place we get a fax every for 30 calls from and to, for any of our phone
lines and cell phones as well. At the end of the day, or a few times a day,
we get a fax from the tele company of all the tele traffic, and details of
each call. We get the number dialled, time and date of the call, duration of
the call, and if it is a received call we get the number of the location
that dialled us. This can be used as a legal record, and also to keep track
of the telephone companies billing at the end of each month. We keep these
records for 3 years.

--

Greetings,

Jerry Greenberg GLG Technologies GLG
=========================================
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Electronics http://www.zoom-one.com/electron.htm
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"Ian R. Adlon" <blues.pwr@verizon.net> wrote in message
news:ZAV%b.1841$6c5.1344@nwrdny01.gnilink.net...
I am looking for a circuit that will count the number of incoming phone
calls. It should use two 7-segment LED displays to display the number of
calls that have come in.

 

I know Elector used to have such a counter in their magazine, a long time
ago. Maybe they stored it in their archives somewhere. www.elektuur.nl

 

[Chaos Master]

A gnome called Bill Vajk wrote:

You need to be a bit more clear with your request. Do
you want to count the rings or the "off hook"
episodes? Neither gives you a precise "incoming
calls" count. Radio shack used to make a device
which monitored the phone line that served to
detect incoming calls (as an offhook after some
[# reported} rings including duration) and as what
is called a pen recorder which reports the outgoing
call number and the duration of the call, all printed
on a paper adding machine tape.

If by "incoming call" the poster means "when the phone rings", I think that one
of those DTMF decoding IC's (e.g. HT9170 from Holtek) can be used. It has a
microcontroller/microprocessor interface so you need just to detect when there
is anything at the outputs (BCD-coded number IIRC).


--
by Chaos MasterŽ - MSN: wizard_of_Yendor@hotmail.com

"A Elbereth Gilthoniel, silivren penna miriel o menel aglar elenath!
Na-chaered palan-diriel o galadhremmin ennorath,
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Linux User #327480 / GNU-Win32 / Cygwin / Win98 + LiteStep

 

[Bill Vajk]

Chaos Master wrote:

A gnome called Bill Vajk wrote:

You need to be a bit more clear with your request. Do
you want to count the rings or the "off hook"
episodes? Neither gives you a precise "incoming
calls" count. Radio shack used to make a device
which monitored the phone line that served to
detect incoming calls (as an offhook after some
[# reported} rings including duration) and as what
is called a pen recorder which reports the outgoing
call number and the duration of the call, all printed
on a paper adding machine tape.

If by "incoming call" the poster means "when the phone rings", I think that one
of those DTMF decoding IC's (e.g. HT9170 from Holtek) can be used. It has a
microcontroller/microprocessor interface so you need just to detect when there
is anything at the outputs (BCD-coded number IIRC).

I don't see any "ring detect" in the chip you mention.

But there is a unit that does fill the bill at

http://www.guardiantelecom.com/products.php?view=6

 

[Terry Pinnell]

"Ian R. Adlon" <blues.pwr@verizon.net> wrote:

I am looking for a circuit that will count the number of incoming phone
calls. It should use two 7-segment LED displays to display the number of
calls that have come in.

I can't put my hands on the circuit now, but many years ago I made a
gadget to do that. When I returned home, if there had been any
incoming calls a (an?) LED would be flashing and a counter showed how
many unanswered calls had been detected. The counter was actually a
mechanical, solenoid-operated type - this was my surplus hoarding
period. The detector was a small coil fitted underneath phone on
suction pad. From memory, the circuit amplified the ac voltage induced
into the coil, converted it to DC, then increased counter by 1 when
ringing was followed by some relatively long period of silence.

--
Terry Pinnell
Hobbyist, West Sussex, UK