To scale the asterisk ideally you would have multiple front end servers that your phone could register to…
the problem is with VM and to let other servers talking over IAX where the SIP account is registered…
we need to have a “BGP” Like routing protocol so a registering server can inform other servers or centralized CDR / VM Servers that it has the SIP account…
if you would like to help or have an idea, please email me: