I think I found a solution. At first it did not seem to work then on a Monday I came back to it. Started over and now it works. This is on a Redhat Linux dhcp server. This is what I used. We may need to try the VLAN options but for now it is working as shown here.
# Shoretel custom option
option ntp-servers 10.10.xx.xx;
option time-servers 10.10.xx.xx;
option shoretel-server code 156 = string;
option shoretel-server "ftpservers=10.10.xx.xx";