AnsweredAssumed Answered

vrf modem???

Question asked by VRFuser on May 31, 2002
Latest reply on May 31, 2002 by VRFuser
Hi Tom,

That is definitely no problem. First, identify the COM port your modem is on.
Then start talking to it through direct i/o. To start with, I would send
"AT&F
", read a string which will be "AT&F
" (the echo) and then read the
next string which will probably be "ok
". These two answers do already come
from your modem!

Then, have a look at the reference manual of the modem. Check for the list of
'AT-commands' and the luist of 'S-registers'. The example I used above is the
AT-command to restore factory settings. Another command is the one for dialing:

"ATDT1234567
" will dial the number 1234567 in tone dial.

If you do not have a direct line, do this:

"ATX3
" tells the modem not to wait for a dialtone.
"AT&W0
" saves this property so that it will still be there after
power-off-on.
"ATDT9,,1234567
" dials 9 to get an outside line, waits a short time and then
dials 1234567. You have to have a look at the exact answers coming from the
modem, they may look different from type to type. This can easily be done using
the BUS I/O MONITOR.

After the ATDT-command, the connection will be there, indicated by strings like
"CONNECT_19200
" or alike. From that moment, you can directly talk to
whatever is attached on the other end. The two modems will behave as if not
existing.

As soon as you want to interrupt the data transfer (and the increasing telephone
bill), you send "+++" or whatever was sent to the modem as 'Escape Sequence'.

You can do some training for that by talking to the modem via Hyperterminal and
writing down the exact syntax of what was sent and received.

Hope that helps.

Best Regards

Thomas Vauderwange

Thomas.Mitchell@Autoliv.com wrote:

> Can VEE use a modem? I would like to write an application that I could call
> in via a dial up modem and do certain functions.  I want to have VEE
> ansdwer the phone, do some functions, then hang up and wait.  Any example
> programs out there??
>
> Thanks,
>
> Tom mitchell
> autoliv
>
> ---------------------------------------------------------------------
> This is the "vrf" maillist, managed by Majordomo.  To send messages to
> this maillist, just email to "vrf@lvld.agilent.com".  Subscriptions and
> unsubscriptions are done through the address "vrf-request@lvld.agilent.com".
> If you need details, just send a message containing the text "help"
> to "vrf-request@lvld.agilent.com".
> ---------------------------------------------------------------------

---------------------------------------------------------------------
This is the "vrf" maillist, managed by Majordomo.  To send messages to
this maillist, just email to "vrf@lvld.agilent.com".  Subscriptions and
unsubscriptions are done through the address "vrf-request@lvld.agilent.com".
If you need details, just send a message containing the text "help"
to "vrf-request@lvld.agilent.com".
---------------------------------------------------------------------

Outcomes