4PSA VoipNow is the leading Linux IP PBX software for Hosting Service Providers, Internet Service Providers, businesses of all sizes, call centers and residential users.The software can be used to deliver hosted PBX services or as a standalone PBX in a company office. Easy to use and deploy, it makes possible advanced telephony services with intelligent call routing, prepaid and postpaid billing plans, callback features, IVR’s, voicemail, calling card, callback, conferencing and call queues.Based on Open Source components and standards, with an Asterisk telephony engine, 4PSA VoipNow is compatible with standard hardware SIP phones and softphones running under any operating system. The provisioning system supports major SIP phone vendors and dramatically reduces deployment times.The user management is based on four hierarchical access roles (admin, reseller, client, extension). User accounts are isolated, with independent permissions and limits. 4PSA VoipNow can be integrated with third party applications for billing or user management using a SOAP API interface.The web interface is template based, skin-able, and fully customizable. Users can choose the interface language independently as well as the preferred skin. The system can be branded based on the owner\'s business profile. Documentation and SDK tools are provided for translators and third-party skin developers.4PSA VoipNow is designed to work on x86 and IBM PowerPC architecture servers. The system can sustain several hundred extensions even on an entry level server.
For more details about the software installation using the Command Line Installer, check:http://www.4psa.com/docs/voipnow/voipnow_commandline_installation.html