This article provides information on the 2300 IntelliTouch Serial Controller

The 2300 was the first IntelliTouch SmartSet serial controller (first to use the 10-byte SmartSet data packet).  It was the last IntelliTouch controller to offer extensive on-board jumper configuration.  It could be configured either by the jumpers or by sending SmartSet commands.  The driver could obtain configuration information either from the on-board jumpers or from the on-board NVRAM (determined by one of the jumper settings).  It was discontinued around 2005.