Asterisk

(users:1- ∞) Enterprise

Connection:
Sip, Pri, Pots

Licence Fees:
No

Users Per System:
Unlimited (Clustering)

An enterprise voip system can provide communication service with the greatest flexibility in software and connection choices. The industry standards compliant asterisk platform can connect to the existing lines that service your building. Phones connect using the data network already installed, allowing the throughput needed for high definition voice.
Database [...]

Asterisk, Infrastructure, Voip

Asterisk Platform Information

Asterisk is an open-source telephony server that runs on the Linux operating system. By using IEEE approved open source software and redundant hardware, the reliability of a phone system is increased.
Overhead in purchase and operation of a business PBX is also reduced when it can communicate using all availaible voice protocols, and has the means [...]

Asterisk, Digium, PBX