I have two phone DID numbers with nvoip.com.br How can I select via dial which one for example 9 + number for one DID (Goiania) and 8 + number (Sao Paulo) for the other DID location?
You can add separate outbound rules, for example one with the prefix 9, and select the SIP Trunk and strip 1 digit. In the outbound CallerID, place your DID number for that rule.