VoIP This topic has 0 replies, 1 voice, and was last updated 21 years, 9 months ago by sagayan. Viewing 1 post (of 1 total) Author Posts 27th February 2003 at 06:06 #23635 sagayanGuest Dear Friends, I am planning to design an infrastructure on VOIP. I need to do billing for inbound calls from an external gateway. Author Posts Viewing 1 post (of 1 total) The forum ‘Voice over IP’ is closed to new topics and replies.