Rafe Needleman, Always On’s leading pundit, has written a nice piece on the need for Border Session Controllers and identified some of the leading players.
Rafe’s right. In order for VoIP to be trusted by IT professionals (read Network Managers and CIO’s) they are needed.
BSP’s are all part of the plumbing of VoIP. They’re not sexy or fancy, they just keep the calls coming in and going out, ending up at the right end point.