On 6/1/2013 11:23 AM, Peter wrote: > I'm looking for some assistance getting this TU up and running. Slightly fuzzy schematic and manual. <http://www.islandregister.com/phones/new/fsk-1000.pdf> Looks like the Serial data is jumperable for TTL or RS-232 levels and is on what I think is an RCA phono connector on the back panel. Jeff-1.0 wa6fwi