Thanks for suggestions, everyone- I should have thought about jitter and latency as I began to use up more & more bandwidth. I was concerned that it was a problem with my configuration of Asterisk, but it looks like is really is a bandwidth issue. By the way, Joe- I've been in another situation with my cableco & Asterisk/VoIP (on a business connection!) and would frequently have trouble getting <b>one</b> call that sounded good, even though we had several megabits up & down, with no other traffic on the network. Charter's service is horrible- there were several times pinging Google took over 1 second.<div>
<br></div><div>John Timms<br>
<br><br><div class="gmail_quote">On Sat, Nov 7, 2009 at 2:45 PM, John Timms <span dir="ltr"><<a href="mailto:johngtimms@gmail.com">johngtimms@gmail.com</a>></span> wrote:<br><blockquote class="gmail_quote" style="margin:0 0 0 .8ex;border-left:1px #ccc solid;padding-left:1ex;">
Hi. I'm having trouble figuring out why I'm not able to make many<br>
concurrent VoIP calls on my system. I'm not aiming for a huge number,<br>
because I have purposely bought a low powered system, but I would<br>
think that I could get more. Here are the details:<br>
<br>
I have a small-form-factor Asterisk server with an Intel Atom 230 CPU<br>
(1.6 GHz, 533 MHz FSB) and 512 MB DDR2 533. It is running Ubuntu<br>
Server 9.04 with the default Debian package manager installation of<br>
Asterisk. (version 1.4)<br>
<br>
Here is what is going on: I'm making outgoing calls (with .call files)<br>
via SIP (using Vitelity's service, if anyone wants to know) with about<br>
55.0 ms latency between my Bellsouth DSL connection & their servers.<br>
I'm using GSM-format prompts with GSM encoding (disallow=all,<br>
allow=gsm in sip.conf) and I'm able to make about 7 concurrent calls.<br>
I have a very fast internet connection, so there is still plenty of<br>
bandwidth, and the "top" command shows that Asterisk is only at about<br>
5% CPU and 10% RAM. Even with only 7 calls, a landline phone will<br>
"skip" occcasionally, but cell phones have perfect quality.<br>
<br>
I don't think that 7 calls is very many, I'll be happy if I can get 10<br>
good-sounding calls. Can anyone give suggestions? (If this has been<br>
hashed out elsewhere, I'm happy with a link to more information!)<br>
<br>
Thanks.<br>
</blockquote></div><br></div>