Dear Mantonegro.
Thank you very much for your attention.
When performing the operation the call is not cut, the phones verify them, I even did tests with other (new) telephone devices always dialing by tones.
Repeating the Flash did not. (On Monday When I have access to the plant) -It is in a Bank-, I will take the Test and report the results.
Reiterated thanks for your response and best regards.
Dear Mantonegro.
Thank you very much for your attention.
I did the Repeat Flash Test and it worked, but the problem was the External line input (I put an Expansion Board) and connect the External Line, which solved the problem.
Thank you very much for collaborating.
Greetings.-