>>>>>>>Dear all;
>>>>>>>
>>>>>>>After almost 2 years, one of my applications is not working…
>>>>>>>This particular one has a button which makes telephone calls using MSCOMM (AT commands)
>>>>>>>So far, so good. BUT! Until now, it wasn’t necessary to dial numbers with more than 10 digits (US standard). Now they have to call 1-800 numbers (11 digits), and mi “dialer” doesn’t work! (Your call cannot be completed as dialed….) I verified the numbers, all valid.
>>>>>>>I thought it could be the switchboard, but if you dial manually…it works fine, so, I have not idea what’s going on.
>>>>>>>Any help on this?
>>>>>>>Thank you,
>>>>>>
>>>>>>I haven't used MSCOMM for dialing, but try putting in a comma or two after the "1", before the "800". A comma is a 2 second pause for AT commands.
>>>>>
>>>>>Thanks for your answer, I have tried (in advance) your suggestion, the same....
>>>>>In fact, I tried putting commas everywhere! Nothing changes. This is really weird.
>>>>
>>>>Are you sure you're not on a PBX that requires you to dial "9" or something else first to get an outside line?
>>>
>>>Totally sure. As I said, If you dial manually it works.
>>
>>That's not necessarily any indication. Some phones can be programmed to dial the "9" (or whatever is needed) so the user doesn't have to do it.
>
>Good point!
>But, as I posted a few minutes ago, now arises another thing... it dials 1-800 plus 2 numbers (randomly) I'm tired...

Sure sounds like it's limiting it to an "internal" phone system number to me. I'd really look into the outside line thing.