Phone doesn't receive calls after router reboot! Is Registration Random the answer?

[ruiseixas]

Hi,

My phone, after I reboot my broadband router, doesn't receive calls, the status appears as registered but it's only able to make calls not to receive them!

Is there any way to make sure that the phone becomes aware of its connectivity to the internet and updates the status accordingly?

I tried to use a STUN server (stun.counterpath.com) but with no success! I thin that the real problem here, is that the phone isn't aware that the Internet connection was lost.

Regards,
Rui