Main portion of the advantages of the Asterisk server appears from it being an open source downloadable product. Most of the users, especially business people, can find it difficult to understand the idea behind this principle, or free software, but a business models behind open source are different and specific, as in case with Asterisk server.
B2VOIP.de is a secure ISP-PBX VoIP solution to business level in ISDN quality that can be integrated easily into any voice infrastructure and is provided here on a stable high-capacity communications platform.