>>>>>>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...