i was wondering if i wanted to could i hook my system up to a ip pbx??? astrisk or 3cx??? also if i did would the 1a2 system show the pbx that a line is in use??? so for example if i have a cisco ip phone as an operator phone would the pbx and key system show a line in use all across the system??? and is there anyway i could add a loud speaker set up for paging??? also i am still looking for parts such as phones, cards, ect.
thank you all for your help