International dial around triggered by an SMS, GPRS, Web.

Linux-based IP User Agent (\”Internet telephone\”) developed at the Royal Institute of Technology, KTH, Stockholm, Sweden.

“spam over internet telephony”

draft Version 2

Useful step-by-step guide to setting up the open-source Linux-based PBX

“This article explores key principles and technology innovations underlying VoIP, and describes the implications of these innovations for software developers.”