(July 14, 2008 . Hatboro PA.) Grandstream Networks, a leading designer and manufacturer of innovative, affordable, and high quality IP voice and video products for the worldwide broadband telephony market has chosen Touchstone Technologies' WinSIP SIP call generator for testing their popular series of IP PBXs and SIP phones.

WinSIP provides several advantages for Grandstream; the first is its ease-of-use and intuitive interface which allows Q/A personnel to get up and running quickly. The second is its affordable price. Third, is its portability which allows the Grandstream marketing team to take WinSIP on the road to show-case the robustness of their All-in-one IP-IBX, demonstrations can be seen at their booth at tradeshows.

Khris Kendrick, Sr. Director of Business Development and Marketing at Grandstream said "We have developed a very good working relationship with Touchstone which has become mutually beneficial. If you stop by and visit either Grandstream or Touchstone at a tradeshow, you will likely see our H.264 and H.263 video phones in their booth and Touchstone ' s WinSIP call generator in action in ours. Our Service Provider Partners and Distribution Channels demand a quality product. Touchstone demonstrates RFC3261 standard SIP protocol interoperability between WinSIP and Grandstream CPE devices and this one tool allows us to test for stress, test features, and perform negative tests. When you visit Touchstone at a trade show and see our products in action, you will see a very impressive demonstration on how they use our phones to generate test scenarios that can then be replayed in bulk quantities."

Khris goes on to say "We use their WinSIP test tool to demonstrate robustness of our IP PBXs in real time. It ' s pretty impressive for people to see and hear how well our products continue to perform to specification under load without denial of service. WinSIP is an amazing tool for us and has a lot to offer in terms of its feature sets, performance, and price."

For more information on WinSIP or Touchstone' s other products, visit their website at http://www.touchstone-inc.com . To schedule a web-based demonstration, please contact sales@touchstone-inc.com or call +1.215.672.6550.

For more information on Grandstream's product line visit them at www.grandstream.com. For sales information, please visit http://www.grandstream.com/contactus.html or call +1.617.566.9300.