Rick513:

Executone Encore 616 is the original version. With the 616 you DO NOT have ringing line answer at all. If you have the Encore 616 Plus CPU, you have ringing line answer. This system is so old that unless you use the GN Netcom Remote Handset lifter with their wireless units, I don't think that you will make this customer happy because the handset has to be lifted or the SPR/MONT button depress. I hope this helps and good luck. By the way, this system isn't hard to program, it's just very manual but a tech can walk you through the steps to program it.