[ILUG] Help needed with VOIP & Digital Phone

[Michael Watterson]

Alan Ryan wrote:
> 2009/3/5 Alan Ryan <alan at codecrunchers.ie>
>
>   
>> Hi Joerg,
>>
>>
>> The e270 is up and running, pretty reliable.  Used a softphone today, but
>> the quality was pretty bad alright.  I could hear them fine, but the other
>> side said that there was a delay and terrible echo.  Is it the e270 or the
>> o2 connection that you think the problem might lie with?
>>
>> Alan
>>     
The problem is Mobile Internet, not specifically O2 or the Modem.

It has 100ms to 2000ms latency, typically 150ms
High Jitter
speed varies from 0.050Mbps to  5Mbps +
Packet loss can be high or OK.

It's inherently unsuitable for VOIP. If more than about 10 people are 
using your sector it's likely to be poor.
It's possible to get more consistent VOIP on 40Kbps dialup!