> - I've used gnomemeeting for "normal" > video-conferencing (low quality video, so-so sound, > bad framerate) on slower connections. Has anybody used > it on a T1 connection? How does it run? Is there a > better solution? This highly depends on the codec you're using. I have used GM for making calls from Poland to Germany over 11mbit WiFi and then T1 (and higher) during a talk about GM and it worked extremely well (almost no delay and jitter -- excellent sound and hi-res picture). The quality grows noticeably if you use big pipes but after exceeding a certain bandwidth, it doesn't get better because the bitrate-usage of the audio- and video-codec is maxed out at some point. It's also very useful to try different codecs (speex for sound is in my eyes a very good choice). The quality between two GM peers is mostly better than between Netmeeting and GM or Netmeeting and Netmeeting due to the vast choice of codecs that are only partially present in NM. As of now, GM seems to be one of the best solutions when looking at unicast VoIP and Vid-Conf. But there's certainly a drawback if you want to do multi-user conferencing: since GM is (as a H.323-client) unicast-oriented, you can only do group calls using so called MCUs (e.g. OpenMCU). This is quite heavy in terms of bandwidth-usage since the MCU-server needs to cope with the streams that come in from and go out to all participating clients. This is, obviously, not a problem with GM but with the concept of unicast VoIP and Vid-Conf in general. Due to the vast amount of different possible setups it's very difficult to really issue generally valid statements about the performance. Christian -- JOIN - IP Version 6 in the WiN Christian Strauf A DFN project Westfälische Wilhelms-Universität Münster http://www.join.uni-muenster.de Zentrum für Informationsverarbeitung Team: join uni-muenster de Röntgenstrasse 9-13 Priv: strauf uni-muenster de D-48149 Münster / Germany GPG-/PGP-Key-ID: 1DFAAA9A Fon: +49 251 83 31639, Fax: +49 251 83 31653
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