Aastra 5380ip phone

registeration of aastra 5380ip as sip peer

I can see nothing in the documentation claiming support for SIP, H.323, or “Skinny”, so I assume you will need to use an Aastra 400, Aastra X Series or anAastra 5000 server as a gateway.

i have Aastra 400. so i should use it as gateway and my asterisk as sip provider?