How to register a trunk to asterisk realtime + mysql?

Hello, please do not judge strictly if someone question seems stupid and thanks in advance.
How to register a trunk to asterisk realtime + mysql ?
The situation is the following trunk is logged if you specify the callbackextension value specifies the internal number for example, 101. if I remove the value and leave blank check the trunk does not pass. Can't find a full manual for Asterisk Realtime . Generally it would be desirable that the incoming call is left to the context.
Thank you for your answer. asking Google not to send I have like 8 hours in the search.
April 19th 20 at 12:46

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