Yes, SP1 is configured as SIP, SP2 as GV.
The issue is that
77777777@sipme.me:5060 is ringing ok and if answered - will work ok, however
the phone port ringing only once or not at all.
When I remove SP1(77777777@sipme.me:5060) from inbound rule, phone will ring ok.
Other interesting thing is that caller think that call is connected almost immediately and start charging for it.
To check this, you can call your GV account using skype, and you should see that skype start charging before you actually answer the call.
I did not answer the call here.