SIP Trunking Benefits and Best Practices - White Paper by Janne Magnusson,Vice President, Product Management, Ingate Systems.
SIP Trunking Gets Down to Business
Toshiba white paper Debunking five common misconceptions about extending business IP telephony.
Telecommunications Industry Group.
Telecommunications Carriers Forum.
The SIP Trunking Network.
A forum to discuss voip news.
A reference guide to all things VOIP.
