bill@computrust.com
2004-Mar-19 11:38 UTC
[Asterisk-Users] High latency from Europe, 500-800ms.
We're using a 7940 from Europe, connecting to a US Asterisk server, and it works great. We setup a local Asterisk server in Europe, had the 7940 connect to it, and used IAX2/GSM to connect to the US. It is choppy using all CODECS, and I am curious if there are any recommendations on getting this to work well? I'd rather not have the phones connect directly to the US. Thanks. Bill
Thomas Gallaway
2004-Mar-19 11:54 UTC
[Asterisk-Users] High latency from Europe, 500-800ms.
bill@computrust.com wrote:>We're using a 7940 from Europe, connecting to a US Asterisk server, and >it works great. We setup a local Asterisk server in Europe, had the >7940 connect to it, and used IAX2/GSM to connect to the US. It is >choppy using all CODECS, and I am curious if there are any >recommendations on getting this to work well? I'd rather not have the >phones connect directly to the US. > >Thanks. > >Bill > >Sounds like you are having network issues. What kind of connectivity is on both ends? Do a traceroute from site A to site B and see where the latency is coming from. I usually have 128ms pings to europe (germany). -- Thomas
Nicolas Bougues
2004-Mar-19 11:59 UTC
[Asterisk-Users] High latency from Europe, 500-800ms.
On Fri, Mar 19, 2004 at 08:38:49PM +0200, bill@computrust.com wrote:> We're using a 7940 from Europe, connecting to a US Asterisk server, and > it works great. We setup a local Asterisk server in Europe, had the > 7940 connect to it, and used IAX2/GSM to connect to the US. It is > choppy using all CODECS, and I am curious if there are any > recommendations on getting this to work well? I'd rather not have the > phones connect directly to the US. >What I can tell you is that we are located in Europe, and have several users in Canada, often using G.711 as codec, and the communication is almost always cristal clear. So your problem is probably related to network congestion somewhere on your side, on the remote side or in transit. traceroute is your friend. -- Nicolas Bougues Axialys Interactive
There is a misprint in the IAX config file..an extract from my file is as follows: jitterbuffer=yes dropcount=4 maxjitterbuffer=500 maxexcessbuffer=300 You should enable jitterbuffer (disabled by default) and there is a typo in 'maxexcessbuffer' in the default files. I am in the UK and the above config fixed my choppy audio to the US. I was able to run a-law across the atlantic. Sounded fantastic! Rgds Tim bill@computrust.com wrote:> We're using a 7940 from Europe, connecting to a US Asterisk server, and > it works great. We setup a local Asterisk server in Europe, had the > 7940 connect to it, and used IAX2/GSM to connect to the US. It is > choppy using all CODECS, and I am curious if there are any > recommendations on getting this to work well? I'd rather not have the > phones connect directly to the US. > > Thanks. > > Bill > > > _______________________________________________ > Asterisk-Users mailing list > Asterisk-Users@lists.digium.com > http://lists.digium.com/mailman/listinfo/asterisk-users > To UNSUBSCRIBE or update options visit: > http://lists.digium.com/mailman/listinfo/asterisk-users
bill@computrust.com
2004-Mar-19 12:18 UTC
[Asterisk-Users] High latency from Europe, 500-800ms.
Thanks for info, but this didn't seem to help. Just to clarify, we are in south-eastern Europe, and obtaining the Net via satellite. As stated, the 7940 on the same network, connecting to the US, it works great, but when we have the 7940 connect to the local Asterisk server, which then connects to the US, it is very choppy. Maybe the Cisco's have inherently better CODEC support? Maybe the one additional hop with the local Asterisk server is making the difference? Bill>There is a misprint in the IAX config file..an extract from my file is >as follows: > >jitterbuffer=yes >dropcount=4 >maxjitterbuffer=500 >maxexcessbuffer=300 > >You should enable jitterbuffer (disabled by default) and there is atypo> in 'maxexcessbuffer' in the default files. > >I am in the UK and the above config fixed my choppy audio to the US. I>was able to run a-law across the atlantic. Sounded fantastic! > >Rgds >Tim
bill@computrust.com
2004-Mar-19 12:57 UTC
[Asterisk-Users] High latency from Europe, 500-800ms.
Maybe I'm not articulating myself well. The 7940 on the same network in Europe *works great*, no problems, sound is perfect, even with the higher latency. If I take that 7940 and have it connect to a *local* Asterisk server, which connects to the states, it sucks. The 7940 though, connecting directly to the states, works great. Bill>Not all sat connections are one way. But the issue with sat connections>is.... *drumroll* latency! >As the signal is beeing relayed over the sattelite this will cause >latency. Also if the sat service is not >providing enough downstream it's bad too. > >I would definately look into getting your network straighend out first.>There are many factors. >Is your connection shared? What speeds? > >Let say it like that if you have people on your local lan usingbandwith>or running peer 2 peer >filesharing stuff this will take away your upstream speed. Do sometests.