"While Asterisk IP PBX software can be a boon for cash-strapped
businesses that need phone upgrades, the free, open source platform
has also spawned a host of for-profit vendors that charge for
Asterisk professional services, peripherals and software extensions
and still manage to undercut the prices charged by more established
IP PBX vendors.
"Digium, the business founded by Asterisk creator Mark Spencer
to capitalize on his PBX, says it plans later this year to release
a new version that will support much larger deployments. New
Jersey-based service provider VoicePulse plans a hosted PBX service
based on Asterisk deployed on virtual servers..."