Specifications

Digium, Inc.
for download free of charge. Asterisk is the most popular
software available, with the Asterisk Community being the
in VoIP.
Asterisk as a Switch (PBX)
Asterisk can be configured as the core of an IP or hybrid P
calls, managing routes, enabling features, and connecting c
outside world over IP, analog (POTS), and digital (T1/E1)
Asterisk runs on a wide variety of operating systems including
Mac OS X, OpenBSD, FreeBSD, and Sun Solaris. It provi
features you would expect from a PBX including many adva
that are often associated with high end (and high cost) propr
Asterisk's architecture is designed for maximum flexibility
Voice over IP in many protocols, and can interoperate with
standards-based telephony equipment using relatively inexpe
hardware.
Asterisk as a Gateway
It can also be built out as the heart of a media gateway, br
legacy PSTN to the expanding world of IP telephony. Aste
architecture allows it to convert between a wide range of c
protocols and media codecs.
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