According to Frost & Sullivan’s 2005 enterprise telephony systems market report, Avaya and Nortel’s combined share of the North American market is 38.8 percent. IPI notes that, if added to Cisco’s 19.8 percent share this represents a total of 58.5 percent across all three vendors. "In Europe, Alcatel has a significant share of the rapidly emerging VoIP market."
Prognosis is billed as "a comprehensive suite of lifecycle management software products spanning network-readiness assessment, pre-deployment assurance testing, and ongoing performance management for IP communications environments. It is claimed to manage more than 200 of the world’s largest implementations of Cisco CallManager.