need help finding voice modem

Do you have a question? Post it now! No Registration Necessary

Translate This Thread From English to

Threaded View
I need to find a basic rs232 voice modem for a proof of concept device.
  The final product will have the functionality built in but for now I
need an external solution.

The application will generate DTMF codes, and send a voice message.  The
modem needs basic hayes commands, enough to go off hook and dial out,
send a message and hang up or hold the line open.  ARM9 processor
running a uLinux distro.

Any help would be appreciated.

Joe


Re: need help finding voice modem
Quoted text here. Click to load it

You don't need a modem, just normal POTS service and at most a
relay to connect/disconnect.  Then it is your choice between DTMF
and pulse dialling.  

--
"The most amazing achievement of the computer software industry
 is its continuing cancellation of the steady and staggering
We've slightly trimmed the long signature. Click to see the full one.
Re: need help finding voice modem
Quoted text here. Click to load it

This is possible with the ZyXEL U1496E(+) series of modems.  However,
you will need quite a bit of time to get it to work, and even then it
wont be very reliable.  I would recommend you to not use a modem at all,
but rather a line-interface module (MITEL does some, IIRC MH44288 or so
is a product code to look for).  These convert the phone line into
audio-in and audio-out, plus control lines to pickup/hangup.  This line
interface, an ADC/DAC and off you go.  No Hayes, no char-pacing, no
CELP, no stuck sessions, no nothing.

Site Timeline