configuring ups for services

a client company i support uses both ncr/att backup batteries which run powermopn softwareand apc ups backup pro 650 which operate of ups service in windows nt4.0. i beleive that if a att/ncr is used then ups shuold be disabled andif an apc is used then powermon should be disabled. i feel if i know a system is being protected by a apc then i should see powermon disabled and notjust set to manaul .if and att is used then i should see ups disabled and not on manual. we have 2 files we use depending on which battarey backup is used that when they are run disables the other service am i right to say if either one is on manual and the other service is started and on automatic that their is potenial for service conflictsand the prfered setting should be disabled. If my analysis is correct how do i find documentation to prove this.