It's a legitimate aspiration, just not one that Kamailio is designed to service, since it's a proxy - it just passes messages. For instance, one cannot "terminate" an invite to Kamailio "for a while". As a messenger, it has no means of doing that. You need an actual user agent involved.
-- Alex
-- Principal, Evariste Systems LLC (www.evaristesys.com)
Sent from my Google Nexus.