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 *one* 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.
John Timms On Sat, Nov 7, 2009 at 2:45 PM, John Timms <johngti...@gmail.com> wrote: > Hi. I'm having trouble figuring out why I'm not able to make many > concurrent VoIP calls on my system. I'm not aiming for a huge number, > because I have purposely bought a low powered system, but I would > think that I could get more. Here are the details: > > I have a small-form-factor Asterisk server with an Intel Atom 230 CPU > (1.6 GHz, 533 MHz FSB) and 512 MB DDR2 533. It is running Ubuntu > Server 9.04 with the default Debian package manager installation of > Asterisk. (version 1.4) > > Here is what is going on: I'm making outgoing calls (with .call files) > via SIP (using Vitelity's service, if anyone wants to know) with about > 55.0 ms latency between my Bellsouth DSL connection & their servers. > I'm using GSM-format prompts with GSM encoding (disallow=all, > allow=gsm in sip.conf) and I'm able to make about 7 concurrent calls. > I have a very fast internet connection, so there is still plenty of > bandwidth, and the "top" command shows that Asterisk is only at about > 5% CPU and 10% RAM. Even with only 7 calls, a landline phone will > "skip" occcasionally, but cell phones have perfect quality. > > I don't think that 7 calls is very many, I'll be happy if I can get 10 > good-sounding calls. Can anyone give suggestions? (If this has been > hashed out elsewhere, I'm happy with a link to more information!) > > Thanks. >
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