MisterQ
Any chance that the google voice account in question resembles an extension of your piaf server?
Explanation:
Around Feb-Apr 2011 I had similar issues when using the default extension number values that came preloaded with piaf+incredblepbx (extensions 700-715) along with google voice accounts that contained "700" to "715" in the name.
Examples of an unreliable google account username:
[email protected]
[email protected]
[email protected]
I then came across a nerdvittles tutorial/article that instructed to set up a "dedicated" google voice account with a username & password that DOES NOT use a(ny) non-alphanumeric character(s). Fearing some sort of ophcrack-type account hack, I tested non-alphanumeric characters to better understand specifically why nerdvittles issued this instruction.
After some quick testing, I determined that "." will work AS LONG AS IT IS NOT used with an extension number string.
Examples of working google account username:
[email protected]
I even tested accounts with two "." and they worked.
Example:
[email protected]
Since then I've reconfigured my installs to NOT keep the default extension number values (for security, not for bugs) and to NOT use google accounts with either default or ANY NEW extension numbers contained in the username (for bugs).
This may explain your issue if your piaf extension number(s) resemble(s) your google account-name(s).
Hope this helps!