asterisk users - Mar 2004 - 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

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

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
> 
> 
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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 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

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 using
bandwith 
>or running peer 2 peer
>filesharing stuff this will take away your upstream speed. Do some
tests.