Conference between Voip and PSTN This topic has 0 replies, 1 voice, and was last updated 18 years, 5 months ago by Mohan. Viewing 1 post (of 1 total) Author Posts 14th August 2004 at 16:32 #27774 MohanGuest Dear All. Can anyone answer me?? Is it possible to do cenference between call receive in a phone connected to FXS gateway and dailed PSTN No. using two line phone set which has conference feature? Mohan Author Posts Viewing 1 post (of 1 total) The forum ‘Voice over IP’ is closed to new topics and replies.