Thank you. What units from Polycom line did you use? > -----Original Message----- > From: [EMAIL PROTECTED] > [mailto:[EMAIL PROTECTED] On Behalf Of > Gordon Henderson > Sent: Wednesday, October 29, 2008 4:45 PM > To: Asterisk Users Mailing List - Non-Commercial Discussion > Subject: Re: [asterisk-users] Is anyone using * for 2 way > video conferencing? > > On Wed, 29 Oct 2008, Robert Augustyn wrote: > > > Hi, > > One of my clients, wants to use * box to run weekly > meetings between > > remote locations over the internet. > > What would be the best configuration for this? We are talking about > > two conference rooms. > > I am referring to the actual hardware/software and bandwidth > > requirements for this to work well. > > I have run two software video phones and I had marginal > results with > > it when displayed on large LCDs, delay and blockines ware > the problems > > I have run into ... > > I've been "playing" with video phones over the past month or 2. > > You've got 3 choices: Bottom-end is Xlite, etc. soft-phones. > > Desktop videophones - currently Grandtream GXV3000 and ATL4000's. > > Top of the range Polycom video conferencing units. > > Starting with the top-of the range ones - these "just work" > Don't even need an Asterisk box. Expensive though - I did one > help setup a pair of these, one in the UK, the other > west-coast US. Both with 42" plasma screens. Very nice, > worked very well. Very expensive. > > More recently I've been using Grandstream GXV 3000's. For the > price; Fantastic. They do have audio and video outputs too - > I have connected one up to my 32" flat-screen TV and it > worked satisfactorily. > > Picture quality is as good as the bandwidth you allow it to > use and they can go from 1 to 30 frames per second. It uses > about 128Kb/sec by default, but you can crank it up to 2 or 3 > times that. The Polycoms I think were using about 225Kb/sec. > > I've used the Grandstreamw with XLite - XLite using the same > codec, so same screen picture size. More or less just worked > when I got the codecs to match. > > > So the big issue is the Internet - you're using a lot more > bandwidth, so need a better link. I found with the Polycoms > that the VPN we were using was introducing a lot of Jitter to > the link which degraded picture quality > - turned off encryption and it was fine (cheap Draytek > routers doing encryption in software) > > Right now, I'm using them in a more "domestic" setting than > business - I know more about the Internet in hte UK, so all > sites I'm experimenting with have good ADSL conections and 3 > of us are on the same ISP, so minimising traffic over the > public Internet. > > So there you go - hope this helps! > > Gordon > > _______________________________________________ > -- Bandwidth and Colocation Provided by http://www.api-digital.com -- > > asterisk-users mailing list > To UNSUBSCRIBE or update options visit: > http://lists.digium.com/mailman/listinfo/asterisk-users
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