To explain better, I can not gather in the conference two IP extensions, the first one remain in on hold status even I press conference button. I tried also clearing the second call and going back to the first call but without success. The first call remains in on hold status.
If I call first another digital entension (tried with digital extension in the same mgw as the initiator) and then two IP extension conference goes correctly.
Someone else have noticed that?
Thank You in advance