Asterisk/Other CTI Hardware based Dialer IVRS / CRM / Voice Logger Based Solutions with computer telephony integration hardware for supporting up to 90 T1/E1 Boards through a single Server can be deployed on Rental EMI and Purchase Modes.Voice logger solutions and IVR call flows Web call back integrations can also be offered under a single roof along with the hardware based dialer solution.
The Asterisk software includes many features available in proprietary PBX systems: voice mail, conference calling, interactive voice response (phone menus), and automatic call distribution. Users can create new functionality by writing dial plan scripts in several of Asterisk's own extensions languages, by adding custom loadable modules written in C, or by implementing Asterisk Gateway Interface (AGI) programs using any programming language capable of communicating via the standard streams system (stdin and stdout) or by network TCP sockets.
Asterisk supports a wide range of Voice over IP protocols, including the Session Initiation Protocol (SIP), the Media Gateway Control Protocol (MGCP), and H.323. Asterisk can interoperate with most SIP telephones, acting both as registrar and as a gateway between IP phones and the PSTN. The Inter-Asterisk eXchange (IAX2) protocol, RFC 5456, native to Asterisk, provides efficient trunking of calls among Asterisk PBXes, in addition to distributed configuration logic, and call completion to VoIP service providers who support it. Some telephones support the IAX2 protocol directly (see Comparison of VoIP software for examples).
In addition to VoIP protocols, Asterisk supports many traditional circuit-switching protocols such as ISDN and SS7. This requires appropriate hardware interface cards supporting such protocols, marketed by third-party vendors. Each protocol requires the installation of software modules. With these features, Asterisk provides a wide spectrum of communications options.
Asterisk is a core component in many PABX in a box commercial products and open-source projects. Some of the commercial products are hardware and software bundles, for which the manufacturer supports and releases the software as open source. Open-source examples include FreePBX and Elastix. Asterisk was one of the first open source PBX software packages. Asterisk is also included in the LinuxMCE home entertainment/automation system.