Since 1983, Digital Speech Systems Inc. has been manufacturing digital call loggers, call recorders, business voicemail, hospitality voicemail, automated attendant and unified messaging solutions. The firm offers products, such as WinVCL Call Logger and WinSeries Voicemail. Its list of customers includes Texas Department of Transportation, R.G. Niederhoffer Capital Management Inc., Silverleaf Resorts Inc. and many more. Digital Speech Systems Inc. is a certified GSA Advantage contractor and is a member of the AVAYA DevConnect Group. Its other partners include major voice processing boards manufacturers and suppliers including Ai-Logix, AudioCodes, Dialogic and Paracon.