OKY3236-1 is a type of RTX Voice board from OKYSTAR, which is a company specializing in VoIP solutions for commercial and residential users. It is a 2-port FXS VoIP Gateway board, which supports the SIP protocol, applicable to the global hot telecom VoIP market. It features two built-in analog telephone jacks (FXS) with a four-way RJ11 connector, enabling users to connect analog phones and Fax machines easily, while providing advanced voice features such as echo cancellation, acoustic protection, re-dialing, and more. It also comes with an integrated on-board software tailored for maximum compatibility and flexibility between IP PBX, VoIP platform, and other softswitch solutions.