Open-source and no-cost tools for collaboration
EVERY CALL MATTERS NCP500 Express New Business Editions NCP500X/V New Business Editions v1.0, Nov. 2009.
Sametime Unified Telephony
Whitepaper: Understanding IBM Lotus Sametime and Unified Telephony
Asterisk - Glen Bastes
Speech Mashups - Dan Burnett - Voxeo - SpeechTEK NY 2010
3g basic
Fax_ISD
Sanog18 Opensource Itsp Voice Sujon
Developing Applications with Host Media Processing David Asher.
Understanding the Capabilities of Host Media Processing Brian Elliott, Director of Engineering, NMS.
Real-time multimedia and communication in packet networks Asterisk The open source IP PBX.