And to get incoming GV calls to ring the phone and softphone change the SP1 InboundCallRoute to the same ph,sp2(0@192.168.1.100:5060).
It should be possible to make outgoing calls from the softphone when away from home. You need a static public IP address for the WAN side of your router or a dynamic DNS service. You need to port forward on the router. Also very advisable to change the 5060 port to a completely different number.