Just got my SIP trunk, whats next?

I installed Asterisk yesterday, set just two extensions, and I can use softphones to call from one another inside my LAN.
Today I got a SIP Trunk from Nextiva in US, they gave me some basic parameters to configure my Asterixk (Authentication Name and Authentication Key).

Im very new to this, what I need to do to test outgoing or incoming calls to regular phones using my softphones?
(looks like I have to set some dialing rules and a plan or something, but first time I saw the Asterisk software was yesterday, so Im giving my first steps)

Little help would be awesome.
Thanks guys.

Bump, little help please.
:smile:
Thanks

Please read the posting guidelines, about bumping, then read asteriskdocs.org/

Welcome to Asterisk!

Here are some helpful resources for those who are new and simply need general advice for getting started:

Asterisk 123 Videos:
youtube.com/playlist?list=P … ghW4tpwpRg

Asterisk the Definitive Guide:
shop.oreilly.com/product/0636920025894.do
asteriskdocs.org/

Official Asterisk Training Classes:
digium.com/en/training/asterisk