Penta Corporation is an ISO 9001:2008 certified manufacturer of technology solutions for all segments of Rail Transportation for over 40 years. Penta's products include Penta Media Exchange (PMx) and cPCx VOIP integrated radio/telephone voice dispatching systems and consoles, WavWriter ADA compliant VOIP voice/visual announcement systems and software, WavWriter DS Digital signage solution, radio voice interconnects, interoperability controllers, and communications solutions.