Asterisk是一款实现用户电话交换机(PBX)功能的自由软件、开源软件。Asterisk提供完善PBX功能，可以连接多种不同的电话终端，包括普通电话机，IP电话机，软电话等，支持多种主流的IP电话协议和系统接口。软件名称Asterisk－星号(*)，在Unix（包括Linux）和DOS操作系统中是通配符，用来在查找中适配任何字符，寓意该软件广泛的适用性-Asterisk PBX is a realization of (PBX) feature of free software, open source software. Asterisk PBX to provide better functionality, you can connect a variety of different telephone terminals, including ordinary telephones, IP telephones, soft phones, and support for a variety of mainstream IP telephony protocol, and system interfaces. Software Name Asterisk-asterisk (*), in Unix (including Linux) and DOS operating system is a wildcard, to find the adapter in any of the characters, meaning broad applicability of the software