Caller ID chips

S

Spehro Pefhany

Guest
Are there any good options out there other than Holtek and Mitel?
Preferably more available than those two.

Either a caller ID chip with a MCU interface or a Flash or OTP MCU
with FSK capability.

Thanks!


Best regards,
Spehro Pefhany
--
"it's the network..." "The Journey is the reward"
speff@interlog.com Info for manufacturers: http://www.trexon.com
Embedded software/hardware/analog Info for designers: http://www.speff.com
 
On Mon, 25 Oct 2004 23:28:45 -0400, Spehro Pefhany
<speffSNIP@interlogDOTyou.knowwhat> wrote:

Are there any good options out there other than Holtek and Mitel?
Preferably more available than those two.

Either a caller ID chip with a MCU interface or a Flash or OTP MCU
with FSK capability.

Thanks!


Best regards,
Spehro Pefhany
Click to expand...
What are you needing to do? I'm about to resurrect some of my
_ancient_ analog designs to do call screening. At least I know I can
get the parts ;-)

...Jim Thompson
--
| James E.Thompson, P.E. | mens |
| Analog Innovations, Inc. | et |
| Analog/Mixed-Signal ASIC's and Discrete Systems | manus |
| Phoenix, Arizona Voice:(480)460-2350 | |
| E-mail Address at Website Fax:(480)460-2142 | Brass Rat |
| http://www.analog-innovations.com | 1962 |

I love to cook with wine. Sometimes I even put it in the food.
 
Spehro Pefhany wrote:

Are there any good options out there other than Holtek and Mitel?
Preferably more available than those two.

Either a caller ID chip with a MCU interface or a Flash or OTP MCU
with FSK capability.

Thanks!


Best regards,
Spehro Pefhany
Click to expand...
I used to use the MC145447. is it still available?
 
On Mon, 25 Oct 2004 20:40:48 -0700, the renowned Jim Thompson
<thegreatone@example.com> wrote:

On Mon, 25 Oct 2004 23:28:45 -0400, Spehro Pefhany
speffSNIP@interlogDOTyou.knowwhat> wrote:

Are there any good options out there other than Holtek and Mitel?
Preferably more available than those two.

Either a caller ID chip with a MCU interface or a Flash or OTP MCU
with FSK capability.

Thanks!


Best regards,
Spehro Pefhany

What are you needing to do? I'm about to resurrect some of my
_ancient_ analog designs to do call screening. At least I know I can
get the parts ;-)

...Jim Thompson
Click to expand...
Hi, Jim:-

I just want to throw a quickie special stand-alone call display
together for my own use, so the modem bit would be the same as your
application. It might become a product later.


Best regards,
Spehro Pefhany
--
"it's the network..." "The Journey is the reward"
speff@interlog.com Info for manufacturers: http://www.trexon.com
Embedded software/hardware/analog Info for designers: http://www.speff.com
 
Spehro Pefhany wrote:

Are there any good options out there other than Holtek and Mitel?
Preferably more available than those two.

Either a caller ID chip with a MCU interface or a Flash or OTP MCU
with FSK capability.
Click to expand...
I've been looking too. I ended up advising the customer to buy a few
hundred of the Zarlink (ex Mitel) parts, that would see him over the
next 6 months or so while we sort something out. Even they were
available only in the SM version. There's a Texas appnote on DTMF
detection using the MSP430 but you'd have to watch the dynamic range.

Paul Burke


Paul Burke
 
From: Paul Burke paul@scazon.com

I've been looking too. I ended up advising the customer to buy a few
hundred of the Zarlink (ex Mitel) parts, that would see him over the
next 6 months or so while we sort something out. Even they were
available only in the SM version. There's a Texas appnote on DTMF
detection using the MSP430 but you'd have to watch the dynamic range.

Caller ID is sent FSK and not DTMF. I helped develop mdifications to AT&T Slic
Click to expand...
systems and cards so they could do caller ID when it was first developed. I
think the tones were 1200 and 2250 hz. but this takes me years back. My memory
is that it used the tones of 300 baud fsk but operated at 1200 baud. Current
processors are fast enough and low power enough to do FFTs looking for these
frequencies and extract the calling number. The unit only needs to run for a
second after the first couple of rings. I'm sure I could do this with a PIC.

Rocky
 
On Tue, 26 Oct 2004 23:52:23 -0400, Spehro Pefhany
<speffSNIP@interlogDOTyou.knowwhat> wrote:

On Tue, 26 Oct 2004 08:44:01 -0700, the renowned Jim Thompson
thegreatone@example.com> wrote:

Hi Spehro,

See my patent, 4,472,816, FSK Discriminator, purely analog, marvelous
noise rejection, unlike all the timer-type chips.

Some lurkers will recognize my gyrator filter in there ;-)

Nice. It certainly looks straightforward. Do you think it would work
well on caller ID signals- 1200/2200 Hz at 1200 baud? There's only one
full cycle of 1200 Hz and less than two of 2200 Hz per bit time.

It's the scheme I used (in the mid '70s) to do modems for the
OmniComp/GenRad portable testers. I used to test the scheme, over
ordinary phone lines, from Phoenix to Louisville, thru an acoustic
coupler, and back to Phoenix, with very good error rate.

...Jim Thompson


Best regards,
Spehro Pefhany
Click to expand...
Haven't tried it at 1200/2200, but I'll think on it ;-)

...Jim Thompson
--
| James E.Thompson, P.E. | mens |
| Analog Innovations, Inc. | et |
| Analog/Mixed-Signal ASIC's and Discrete Systems | manus |
| Phoenix, Arizona Voice:(480)460-2350 | |
| E-mail Address at Website Fax:(480)460-2142 | Brass Rat |
| http://www.analog-innovations.com | 1962 |

I love to cook with wine. Sometimes I even put it in the food.
 
On Tue, 26 Oct 2004 08:44:01 -0700, the renowned Jim Thompson
<thegreatone@example.com> wrote:

Hi Spehro,

See my patent, 4,472,816, FSK Discriminator, purely analog, marvelous
noise rejection, unlike all the timer-type chips.

Some lurkers will recognize my gyrator filter in there ;-)
Click to expand...
Nice. It certainly looks straightforward. Do you think it would work
well on caller ID signals- 1200/2200 Hz at 1200 baud? There's only one
full cycle of 1200 Hz and less than two of 2200 Hz per bit time.

It's the scheme I used (in the mid '70s) to do modems for the
OmniComp/GenRad portable testers. I used to test the scheme, over
ordinary phone lines, from Phoenix to Louisville, thru an acoustic
coupler, and back to Phoenix, with very good error rate.

...Jim Thompson
Click to expand...

Best regards,
Spehro Pefhany
--
"it's the network..." "The Journey is the reward"
speff@interlog.com Info for manufacturers: http://www.trexon.com
Embedded software/hardware/analog Info for designers: http://www.speff.com
 
On 26 Oct 2004 21:19:47 GMT, the renowned rolavine@aol.com (Rolavine)
wrote:

From: Paul Burke paul@scazon.com

I've been looking too. I ended up advising the customer to buy a few
hundred of the Zarlink (ex Mitel) parts, that would see him over the
next 6 months or so while we sort something out. Even they were
available only in the SM version. There's a Texas appnote on DTMF
detection using the MSP430 but you'd have to watch the dynamic range.

Caller ID is sent FSK and not DTMF. I helped develop mdifications to AT&T Slic
systems and cards so they could do caller ID when it was first developed. I
think the tones were 1200 and 2250 hz. but this takes me years back. My memory
is that it used the tones of 300 baud fsk but operated at 1200 baud. Current
processors are fast enough and low power enough to do FFTs looking for these
frequencies and extract the calling number. The unit only needs to run for a
second after the first couple of rings. I'm sure I could do this with a PIC.

Rocky
Click to expand...
I'm just looking at the API for a dsPIC 1200 baud soft modem. The
analog stuff would be cheaper and maybe faster to develop. It uses
around 5 MIPS, with the core routines written in assembler, on a
16-bit machine with a 17 x 17 high speed multiplier and MAC.


Best regards,
Spehro Pefhany
--
"it's the network..." "The Journey is the reward"
speff@interlog.com Info for manufacturers: http://www.trexon.com
Embedded software/hardware/analog Info for designers: http://www.speff.com
 
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