Downtime is the bane of existence for unified communications users and service providers alike. When normal operations are disrupted and significant periods of downtime occur, that spells trouble for both the service provider and the customer who relies on that UC solution. For a UC provider, any amount of downtime will sour their relationship with their clientele, especially when delivering hosted PBX to an enterprise. Downtime can be incredibly costly, and not just in terms of losing the trust of the end-user. Service providers can be hit hard financially if they are driving clients into the arms of competitors promising more resilience and reliability. What is even more concerning is the fact that the common causes of downtime are unavoidable.