Thanks for all the replies. Answering the points raised in turn: > How did you perform the speed tests?
Generally using thinkbroadband.com's speed test java applet. > On the matter of the BitTorrent factor: did you have the users connect > the phone, and only the phone, to the Internet connection? Yep, phone straight into the router, computers etc. all powered down. > I don't think it's the packet loss per se; it's more likely to be > jitter, and no, correcting for jitter in Asterisk isn't likely to make > much difference, because the jitter on upstream connections can be so > big that it overwhelms the jitter buffer. The strange thing here is that one some other sites with 2-3 users (remote offices, etc.) where we've deployed "mini-asterisks" (Via Epias in ITX boxes), call quality is much better even over equally "consumer" internet connections. This makes me think that either (or both): 1) IAX is much more tolerant than SIP; 2) Asterisk's jitter buffering is far superior to that in any phones. > The others responding on-list are certainly giving you good advice. I expect > that > what you are suffering is unmanaged QoS at the roaming users end. This almost > certainly will be an issue > with 256k outbound on a network connection that is not dedicated to the voip > application alone. I'd hoped that by insisting the users test call quality with their computers turned off that I'd been able to eliminate this factor. You're right of course - if there's heavy net usage going on, call quality will plummet, but it shouldn't be an issue without other net usage, unless I'm mistaken? >but having a router > capable of QoS at each location is an absolute necessity. I prefer m0n0wall > on a > Soekris Net4501. Generally we use a similar setup (though with pfSense) when we're doing small-scale remote offices with 2-4 employees. The net4801/pfSense combo works very well in that environment. Unfortunately I can't really mandate a mini-asterisk server and Soekris box for each remote user - it'd add many hundreds of pounds to the cost :-) Regards, Chris -- C.M. Bagnall, Director, Minotaur I.T. Limited For full contact details visit http://www.minotaur.it/chris.html This email is made from 100% recycled electrons _______________________________________________ --Bandwidth and Colocation provided by Easynews.com -- asterisk-users mailing list To UNSUBSCRIBE or update options visit: http://lists.digium.com/mailman/listinfo/asterisk-users
