Re: [asterisk-users] VoIP over Alvarion Wireless
On Wed, 7 Mar 2007, Matt wrote: Hi, This question isn't specifically asterisk related, but perhaps someone here can shed some light or offer some insight. Is anyone else here running VoIP over Alvarion wireless?If yes, do you have any suggestions for what you've done to make it work? It seems that no amount of traffic shaping, checking installs for error rates, lowering error rates, or setting contention windows makes VoIP work. It just plain blows over Alvarion wireless gear. Cable and DSL? Yup.. it works great.Wireless? Forget it, pickup your cell phone. Many many moons ago I was involved with community WiFi broadband systems and we used a variety of wireless systems for backhaul I think we trialled Alvarion but never used it - we did use Orthogon, WiLAN and Apperto kit though. The biggest issues we had (with both the consumer facing WiFi and the more industrial backhaul kit) at the time were to do with the packet size and the units ability to cope with small packets. At the nuts bolts level, all the low-end stuff is really half-duplex, so there is a link turn-around-time, and if that exceeds the packet send time, then you're in trouble - VoIP typically requires a full duplex link with small packets going in both directions - you can emulate full duplex with a half duplex link if you can do the turn-around quick enough and/or accept a lower overall data rate, higher latency, etc., but I'm guessing here that the Alvarion kit can't cope - they are typically optimised to stream large quantities of data in full sized MTU packets back to back. (so streaming video and audio seems great, but interactive audio is less-so). Increasing the packet size at the end points may help, if possible - but I'm not sure where to start - Grandstream phones have a Voice Frames per TX: parameter, but I've no idea whether that (or it's equivalent elsewhere) would help, or just make things like latency worse... Things may have changed in the 3 years since I was actively involved in this though, but we spent a lot of time playing with iperf and various makes of links and so on. (and daisy-chaining links back to back, which we found was a really bad thing to do with the 802.11b kit we were using - each hop would halve the throughput )-: So one kiddy running a video phone application killed everything else, or another kiddy doing huge uploads would kill it for people trying to do downloads. Traffic shaping helped, but it really needs to be done at the access point level, and not 2-3 hops further up the network where our routers were typically positioned. If you want good PtP backhaul kit, then get Motorola Canopy units, but I used to work for them (before the company was bought by motorola) so I may be biased ;-) Gordon ___ --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
Re: [asterisk-users] VoIP over Alvarion Wireless
What Alvarion stuff are you using? Alvarion is the top rated wireless manufactor when it comes to VOIP on there new stuff (VL 4.0 series and B100 backhaul series). Some of there older stuff like the BrezeeAccess FHSS will not work well because the QoS that the radio provides is spotty at best. On 3/7/07, Matt [EMAIL PROTECTED] wrote: Hi, This question isn't specifically asterisk related, but perhaps someone here can shed some light or offer some insight. Is anyone else here running VoIP over Alvarion wireless?If yes, do you have any suggestions for what you've done to make it work? It seems that no amount of traffic shaping, checking installs for error rates, lowering error rates, or setting contention windows makes VoIP work. It just plain blows over Alvarion wireless gear. Cable and DSL? Yup.. it works great.Wireless? Forget it, pickup your cell phone. Anyone have any better news, or suggestions? ___ --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 ___ --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
Re: [asterisk-users] VoIP over Alvarion Wireless
We are running Alvarion VL 4.0. We know it doesn't work well over BA or 900. However, with 60 customers, all we error rates below 10% VoIP is aweful. On 3/7/07, Andrew Niemantsverdriet [EMAIL PROTECTED] wrote: What Alvarion stuff are you using? Alvarion is the top rated wireless manufactor when it comes to VOIP on there new stuff (VL 4.0 series and B100 backhaul series). Some of there older stuff like the BrezeeAccess FHSS will not work well because the QoS that the radio provides is spotty at best. On 3/7/07, Matt [EMAIL PROTECTED] wrote: Hi, This question isn't specifically asterisk related, but perhaps someone here can shed some light or offer some insight. Is anyone else here running VoIP over Alvarion wireless?If yes, do you have any suggestions for what you've done to make it work? It seems that no amount of traffic shaping, checking installs for error rates, lowering error rates, or setting contention windows makes VoIP work. It just plain blows over Alvarion wireless gear. Cable and DSL? Yup.. it works great.Wireless? Forget it, pickup your cell phone. Anyone have any better news, or suggestions? ___ --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 ___ --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 ___ --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
Re: [asterisk-users] VoIP over Alvarion Wireless
Something must be setup wrong on your radios. Alavarion is pretty good when it comes to tech support. I would contact the distributer that you bought it from and ask for help. On 3/7/07, Matt [EMAIL PROTECTED] wrote: We are running Alvarion VL 4.0. We know it doesn't work well over BA or 900. However, with 60 customers, all we error rates below 10% VoIP is aweful. On 3/7/07, Andrew Niemantsverdriet [EMAIL PROTECTED] wrote: What Alvarion stuff are you using? Alvarion is the top rated wireless manufactor when it comes to VOIP on there new stuff (VL 4.0 series and B100 backhaul series). Some of there older stuff like the BrezeeAccess FHSS will not work well because the QoS that the radio provides is spotty at best. On 3/7/07, Matt [EMAIL PROTECTED] wrote: Hi, This question isn't specifically asterisk related, but perhaps someone here can shed some light or offer some insight. Is anyone else here running VoIP over Alvarion wireless?If yes, do you have any suggestions for what you've done to make it work? It seems that no amount of traffic shaping, checking installs for error rates, lowering error rates, or setting contention windows makes VoIP work. It just plain blows over Alvarion wireless gear. Cable and DSL? Yup.. it works great.Wireless? Forget it, pickup your cell phone. Anyone have any better news, or suggestions? ___ --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 ___ --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 ___ --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 ___ --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
Re: [asterisk-users] VoIP over Alvarion Wireless
Oh, We've been in contact with them.They said we need to purchase WLP.. which we are in the process of doing.. but then we found some other interesting info out.I'll post a follow up here in a few days if I remember. On 3/7/07, Andrew Niemantsverdriet [EMAIL PROTECTED] wrote: Something must be setup wrong on your radios. Alavarion is pretty good when it comes to tech support. I would contact the distributer that you bought it from and ask for help. On 3/7/07, Matt [EMAIL PROTECTED] wrote: We are running Alvarion VL 4.0. We know it doesn't work well over BA or 900. However, with 60 customers, all we error rates below 10% VoIP is aweful. On 3/7/07, Andrew Niemantsverdriet [EMAIL PROTECTED] wrote: What Alvarion stuff are you using? Alvarion is the top rated wireless manufactor when it comes to VOIP on there new stuff (VL 4.0 series and B100 backhaul series). Some of there older stuff like the BrezeeAccess FHSS will not work well because the QoS that the radio provides is spotty at best. On 3/7/07, Matt [EMAIL PROTECTED] wrote: Hi, This question isn't specifically asterisk related, but perhaps someone here can shed some light or offer some insight. Is anyone else here running VoIP over Alvarion wireless?If yes, do you have any suggestions for what you've done to make it work? It seems that no amount of traffic shaping, checking installs for error rates, lowering error rates, or setting contention windows makes VoIP work. It just plain blows over Alvarion wireless gear. Cable and DSL? Yup.. it works great.Wireless? Forget it, pickup your cell phone. Anyone have any better news, or suggestions? ___ --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 ___ --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 ___ --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 ___ --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 ___ --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
