Sonus Networks, Inc. (Nasdaq: SONS), a leading supplier of service provider Voice over IP (VoIP) infrastructure solutions, and ip.access, the creator of cellular picocell and femtocell technologies, announced today at the 3GSM World Congress in Barcelona, Spain that the two companies have entered into a partnership. Sonus, which recently unveiled its strategy to create new cost-efficient solutions designed to deliver fixed-mobile service over GSM spectrum, will work together with ip.access, which will provide in-building picocell and femtocell solutions. For ip.access, this relationship validates the Company’s IP Multimedia Subsystem (IMS) roadmap and allows ip.access to work closely with a leading provider of wireless and wireline IP-voice and multimedia infrastructure solutions.