Media5 Softphone for iPhone
Media5 Softphone Configuration for the iPhone
Username: your username only - no domain, if your SIP address is firstname.lastname@example.org, you would put in just "joe".
Password: your VoIP password - this is a 16 character password with letters and numbers.
Under 'SIP Server/Domain/Realm'
Address: your domain only
Under 'Outbound Proxy'
Enable Proxy = Yes
Address: sip.onsip.com (sip.onsip.com is the proxy for all users)
Remove Route Header = Off
Reg timer (sec) = 3600 (3600 is one hour)
Use rport = off
Display Name: your name - whatever you want - "Joe Smith" is fine
Auth. Name: your authorized username
VM Number: blank
DTMF Method: RFC 2833/4733
That's it. You should now be registered.