I’m trying to setup fail-over for ISP but the issue is both ISP have different static IP’s and my DID provider only bind one IP. I was reading about setting it up using DDNS but not sure how to.
Also I was reading its not a recommended solution as its not always stable.
Can anyone guide me if there is any other way to setup fail-over with different IP’s? If not what changes do I have to make in asterisk server?
using SIP with cisco 7960 IP phones
system is behind NAT