[Yaesu] FT1000D voice keying

[ve6yp@shaw.ca (tony field)]

I would like to use a sound card for SSB keying 
on the FT1000D. The best choice seems to be the 
DVS-2 input on the back panel.  However, this
not seem to work out of the box - possibly because
the CNTL-1 and CNTL-2 lines need to be manipulated
before the sound will actually be transmitted.

Does any one know what these two control lines do?

Tony Field (VE6YP)
ve6yp@shaw.ca
http://members.shaw.ca/ve6yp