VoIP Conferencing service’s This topic has 1 reply, 1 voice, and was last updated 22 years, 10 months ago by Anup. Viewing 2 posts - 1 through 2 (of 2 total) Author Posts 23rd February 2002 at 20:49 #21283 Tim ClarkGuest Any one know any third party conference service for VoIP phones speaking SIP & G723 or g729 or GSM. 8th March 2002 at 05:26 #21284 AnupGuest NEED INFORMATION ON GSM & SIP Author Posts Viewing 2 posts - 1 through 2 (of 2 total) The forum ‘Voice over IP’ is closed to new topics and replies.