the spec basically states that the "other end" is a voltabe source with a series resistor. So at no load (>120k) it sees a high and at load (<110 ohms) it sees a low.

what is analog switch part number,and what is it's role? it will make the output 110 ohms when seitched on.

At 5bps you can use the circuit I suggested without any problem, just make sure the analog switch can handle the 15V. If this is a onesie, you any analog switch with a max Ron of less then 110ohms, measure it and use the appropiate series resistor, if you are going to produce use a switch with a Ron so low that the tolerance does not matter.

Erik