Jive Communications delivers reliable, enterprise-grade telephone systems and services to businesses and government organizations both large and small. With five different pricing tiers to choose from and 35+ productivity features, Jive is a sure bet when it comes to a reliable VoIP provider. Jive also has dependable customer support as well as an online Knowledgebase and e-ticket submission for all of your service concerns.
Been with them for 2 months. Not long enough to determine reliability. I do understand though they had issues during the Sandy Hurricane. Most hosts in NY and NJ did. Looks like their eggs where is all one basket. However checking their new srv records and failover it looks like they learned from the issue and deployed other servers in the US.