I have 1-7100 and 2-7200's connected via SPNet. Dedicated Internet with Zyxel VPN tunnels between. All worked fine for a couple of years now the 7100 cannot call the other sites. Yet the 7200's can call each other and the 7100. Add to this the 7100 can call the other sites for a brief period after it is called by one of the 7200's.
S/W on the 7100 was 4.46 i moved it to 4.30 (same as 7200's)no change. Installed a new MP10A basic programming and tutorial license.. no change
Always "No user Response"
Port blocking somewhere????