The DS9097U is a sophisticated RS232 to 1-Wire® adapter, which performs RS232 level conversion and actively generates the 1-Wire communication signals. Together with an adequate TMEX software driver, it enables an IBM®-compatible PC to directly communicate with any 1-Wire device connected to the adapter's RJ-11 port.

This is the Dallas/Maxim part. The iButtonlink Link45i is directly compatible with the DS9097U-009 but has greatly improved line driving properties and is recommended for longer line lengths (over 100m).