This article provides details regarding the 2210 Controller

The 2210 was an AccuTouch serial controller that was discontinued in the late 1990's.  It was the first SmartSet controller (the first to use the 10 byte SmartSet data protocol).  It could be configured using on-board jumpers or by sending SmartSet commands.  The driver could obtain the configuration information either from the jumpers or from on-board NVRAM. 

See attached .pdf for drawings