I have a nursing home that would like to have a multiple of phones 15-20 ring during the night when someone dials a digit off the 5.0 Partner mail system is this doable during the night mode

I assume you are talking about the VS5.
Set up a selector code to a call group, add those stations to that group. Don't confuse this with #206. The group would be set up in the ACS programming.

Hope this makes sense.