Originated calls

How to answer all originated calls to asterisk? the calls come form another office with SIP format by internet connection, and all should be handled by asterisk to send to mailboxes by pressing appropriate number in origin.

any help/advise highly appreciated.

I can’t understand the question. Please try explaining in more detail.

I don’t think you are a native English speaker, so please also consider giving the question in both English and your mother tongue.