ADC NewNet Software solutions including SS7 middleware, short messaging and over-the-air service provisioning, SS7-IP interworking, and lawful intercept platforms. Company, product, and training information. http://www.newnet.com/

SS7 Home Offers links, history, tutorials and a free booklet. http://www.ss7.com

Performance Technologies, Inc. Provider of telecom connectivity products, WAN protocol software and SS7 solutions to network operators, equipment manufacturers and system integrators. Company and product information, manuals, case studies, SS7 and IP telephony tutorials. http://www.pt.com/

Expert Telecoms Provides telecommunications conformance testing software written in TTCN including ISDN, SS7, GSM, IN, V5 and ATM. http://www.expert-telecoms.com/

IntelliNet Technologies, Inc. Provide tools for wireless and intelligent network application development running on an SS7 or IP network, an SS7/IP gateway, and telecom software development services. Company and product information, white papers, projects, links. http://www.intellinet-tech.com/

Ulticom, Inc. Network software for telecommunications services, including SS7 and converged IP network products. http://www.ulticom.com/

ECtel Ltd. Systems for telecommunications providers to monitor quality. (Nasdaq: ECTX). http://www.ectel.com/