Call completion to all three of our clusters has been stable since 3:50pm PDT yesterday. We have isolated the root cause of the increased traffic to the US-West datacenter and have already taken short-term steps to ensure that the cluster will be able to respond to a similar influx of traffic in the future. We are also actively working with our carriers to improve the distribution of traffic across our three datacenters so that we can minimize the impact of traffic disparities.