We have delivered several Asterisk based solutions (open source project), including new features development and setup-and-configuration. In brief, it comprises all the usual company needs in regard to telephony from call recording and distribution. It's based on SIP, IAX, H.323 protocols so it may work in any environment and can be integrated with many applications in place. We have managed to use the system with a large variety of IP and analog phones (Cisco, Dlink, Avaya).
VoIP Asterisk SIP IAX H.323 Cisco Dlink Avaya Telephony Telecommunication
13+ years on Elance, 16+ years in software development industry.
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