>>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.