Greenberry Networks, LLC (owner of SIP-UA.com) is a US based VoIP provider dedicated to providing flexible and affordable sip trunking options.
The company’s services are tailored for VoIP engineers and pbx vendors ready to make the move from traditional TDM circuits to VoIP. SIP-UA encourages its customers to use the sip user agent or sip-enabled pbx of their choice, the company also offers free sip trunks for labs and product research.
For more information please visit http://www.sip-ua.com.