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[[File:VOIP-sipURIcall.png|thumb|Calling a SIP URI]]
Incoming calls can be made from the internet to sip:firstname.lastname@example.org
and delivered just like a normal incoming call.
The format of your number should be in +44 format, eg to call AAISP support you'd use: sip:+email@example.com
So, for example, without any configuration or account details a softphone may call your A&A provided VoIP number, as shown in the image here.