Why is the legacy PBX market in decline?
The emergence of open standards and protocols has created a new model in telephony where customers are increasingly in control. More recently, open source technology, such as Asterisk, has driven real technology innovation and parity between vendor and buyer when it comes to economic relationships. In the legacy market, PBX phone system vendors thrived in a world where they could sell proprietary systems, drive customers to single vendor environments, create customer lock-in via proprietary call control and endpoints, and force high margin phone and system deals on to customers.