VoIP vs PABx This topic has 1 reply, 1 voice, and was last updated 21 years, 8 months ago by VoIP. Viewing 2 posts - 1 through 2 (of 2 total) Author Posts 7th March 2003 at 10:59 #23967 denisGuest Hi, I am looking for good reason for changing old pabx to a voip solution (not plugging a card in my old pabx) and reasons for using voip for multisite than using pabx interconnexion. It s very important! Thanks a lot 7th March 2003 at 22:56 #23968 VoIPGuest One reason for using VoIP. You could fit up to five phone calls using digital with the same amount of bandwidth it takes for one call using analog. Author Posts Viewing 2 posts - 1 through 2 (of 2 total) The forum ‘Voice over IP’ is closed to new topics and replies.