It took me a long time to hunt these down and I think default passwords should be freely available.

Aspire webpro (default ip is 172.16.0.10):

Administrator Username: ASPIRE

Administrator Password: 12345678

Extension Username: extension number

Extension Password: 1111

UltraMail (default ip is 192.168.1.250):

Service Number: 2000

System Password: CTL

I also found a manual for UltraMail, and a UserPro manual for programming the handsets with the web interface.

Hopefully none of you are stuck with one of these systems. Hopefully given the option you choose something like Asterisk. Hopefully if 1 and 2 are not true this information helps you.