I would like to use Zoiper over wifi without internet connection and without PBX server is it possible ?.
1. you need to have some account to dial with. You can use a real account, or create a dummy account.
2. Dial the remote SIP URI using the following syntax:
sip:remoteuser@remoteserver (IP address of the user):remoteserverport (example: sip:firstname.lastname@example.org:5060)