I have an UCM6202 and UCM6102 interconnected. UCM6202 is configurated with 4 digit extensions and the UCM with 3 digit extensions. They have been working fine together for several years.
This week the provider of the UCM6202 have changed the static IP address. I have changed the address in both UCM’s in the peer VoIP trunk and in the security settings. What happens now is that the trunk will not register. Nothing else have been changed.
I have observed that it is not possible to ping the two UCM’s WAN addresses. Is this correct? Can you bar the UCM’s for answering ping requests? If so where?