Asterisk PBXesAsterisk is a telephone system (Private Branch Exchange) open-source software package. It can work with Plain Old Telephone Service lines, T1 lines, and Voice Over IP.
Running Asterisk on PC hardware can give you a full-featured phone system, for a fraction of the cost of traditional proprietary PBX systems. You can use IP phones, or, with interface cards for the PC's running the phone system, regular phones. You can have voicemail, voice response systems ("Press 1 for English, 2 for Spanish ...") and custom applications.
- PBX handling one external POTS line, one VOIP service, and two internal extensions, for Friendly and Helpful Consultants' business and personal phone needs.
- An office phone system for several in-office and remote employees, using IP, soft and Skype phones. Employees get voicemail in email and a support voice menu choice rings several lines at once.
- A general system for copying call audio to a third-party signal-processing program in real-time.
- A medical transcription system, where doctors call in and supply metadata to be automatically associated with their recordings.
- A medical appointment reminder calling system.
- VoIP offload servers for branch offices, that lower the bandwidth needs of the central office.