[from-virphone.net]
exten => +11234567889,2,Goto(11234567889-In,s,1)  # Make sure the +11234567889 is the same and the debug that us see comming from SunRocket or soon to be VirPhone.net :-)

[11234567889-In]
exten => s,1,Answer()
exten => s,2,Dial(SIP/?????,20)
exten => s,3,Voicemail(u???????)
exten => s,103,Voicemail(b???????)