Alex Balashov wrote: > On 03/30/2010 11:49 PM, Trixter aka Bret McDanel wrote: > >> On 03/29/2010 02:10 PM, James Sharp wrote: >>>>> I suspect that the latency involved in satellite IP connections creates >>>>> a whole additional level of problem with fax. >> latency isnt as big of a problem as people pretend it is. Jitter and >> packet loss are the real killers. > > I agree; I did not clearly state it, but meant to imply that the jitter > is likely to be highly variable over satellite links. At least, that's > certainly true in my experience, for various reasons. There is no > physical basis for it, but satellite is probably subject to a higher > degree of oversubscription. I don't actually know.
Depends on the satellite link type. Companies like HughesNet use a large outgoing transponder (from the main earth station to the end user), and then a single transponder that gets TDM'd between all of the customer's return links. Depending on how loaded the TDM return link is, latency can be all over the place. The system I built out used the large outgoing transponder + TDM return link as well, but when it detected that a latency/jitter/packet loss sensitive operation (such as a VOIP/FOIP call), it would switch that one site to a dedicated chunk of space segment that was no longer TDM'd. After the call(s) dropped, the site would drop back into TDM mode. -- _____________________________________________________________________ -- Bandwidth and Colocation Provided by http://www.api-digital.com -- asterisk-biz mailing list To UNSUBSCRIBE or update options visit: http://lists.digium.com/mailman/listinfo/asterisk-biz
