If youre providing the server hardware, pricing for Snom One software is free for up to 10 users. Handset pricing starts at around $99 per Snom IP phone, which automatically configure themselves once connected to the Snom One host. This is a full-featured voice management system that works with 32- and 64-bit versions of Linux and Windows as well as Mac OS X, and includes conferencing, auto attendant, hunt groups, voicemail-to-email, hot desking, simultaneous desk and cell-phone ringing and dozens of additional features. It integrates with existing CRM systems through CSTA support.

via Review: Snom One Plus IP PBX.