Re: [asterisk-users] Help with concurrent VoIP calls
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. ___ -- Bandwidth and Colocation Provided by http://www.api-digital.com -- asterisk-users mailing list To UNSUBSCRIBE or update options visit: http://lists.digium.com/mailman/listinfo/asterisk-users
Re: [asterisk-users] Help with concurrent VoIP calls
Hi Joe, What is the app that generates your bandwidth table shown below? Joe Greco wrote: By fast I mean the best Business DSL Bellsouth has to offer: Up to 6.0 Mbps downstream - Up to 512 Kbps upstream That almost sounds like an invitation to check out what business service your cableco offers. One thing to be aware of with DSL and cable modems is that there can be various ill effects as your line gets closer to its rated capacity; do not expect that you'll get a reliable 512Kbps upstream. VoIP is sensitive to loss, latency, and jitter. You may be able, for example, to only get 384Kbps reliably out of the link (before packet loss/jitter/etc wreck its suitability for VoIP). That's a good time to look seriously at a gateway package like pfSense that can prioritize certain classes of traffic while also limiting overall bandwidth. As an example, we noticed on the local business cable offering (2Mbps up) Shaped PL min avg max stddev 2.2M3 6.4 251 557 176 2.1M1 7.8 350 584 134 2.0M3 6.4 271 535 132 1.9M1 7 254 527 131 1.8M0 6 79 339 90 1.75M 0 5.9 14 92 11 1.7M0 5.4 13 77 10 1.65M 0 4.9 11 69 7 1.6M0 5.4 13 55 9 1.5M0 5.3 11 59 7 1.4M0 5 11 57 7 1.3M0 4.9 11 54 6 1.2M0 4.9 11 52 7 1.1M0 4.8 14 53 11 The max starts trending up after 1.6M (helps to graph it) and pretty much everything goes to hell after 1.75M. ... JG ___ -- Bandwidth and Colocation Provided by http://www.api-digital.com -- asterisk-users mailing list To UNSUBSCRIBE or update options visit: http://lists.digium.com/mailman/listinfo/asterisk-users
[asterisk-users] Help with concurrent VoIP calls
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. ___ -- Bandwidth and Colocation Provided by http://www.api-digital.com -- asterisk-users mailing list To UNSUBSCRIBE or update options visit: http://lists.digium.com/mailman/listinfo/asterisk-users
Re: [asterisk-users] Help with concurrent VoIP calls
On Sat, Nov 7, 2009 at 2:45 PM, John Timms johngti...@gmail.com wrote: 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) What kind of NIC are you using and what's the network config? ie Bellsouth - router - switch - you Are you NAT'd? Where are your endpoints connected? (locally, outside?) I have a very fast internet connection, so there is still plenty of bandwidth what is the specs for fast? ___ -- Bandwidth and Colocation Provided by http://www.api-digital.com -- asterisk-users mailing list To UNSUBSCRIBE or update options visit: http://lists.digium.com/mailman/listinfo/asterisk-users
Re: [asterisk-users] Help with concurrent VoIP calls
John Timms 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) Most of my installations are Soekris net5501's with 512MB ram and a 500mhz Geode LX processor. Unless Ubuntu is running a ton of extra junk in the background, that processor should be more than adequate. 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. Your only connection to the PSTN is via SIP right? Then this is likely coincidental that 'landline' calls are different than 'cell phone' calls. The ONLY possibility is that the problem is with your SIP termination provider, but even that is unlikely. As Fred pointed out your DSL connection is likely the cause. Do you have any traffic shaping on the network? If not, you really should have a firewall that's capable of prioritizing voice traffic over bulk data traffic. What is the actual down and up speed of your DSL connection? 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!) Use this calculator to see how much bandwidth 10 concurrent calls will take. http://www.asteriskguru.com/tools/bandwidth_calculator.php Darrick ___ -- Bandwidth and Colocation Provided by http://www.api-digital.com -- asterisk-users mailing list To UNSUBSCRIBE or update options visit: http://lists.digium.com/mailman/listinfo/asterisk-users
Re: [asterisk-users] Help with concurrent VoIP calls
If you've got a bellsouth dsl connection because of the way their system works even with doing qos on the link you can really only do about 8 calls before you start to run into problems with their setup. Tom -Original Message- From: asterisk-users-boun...@lists.digium.com [mailto:asterisk-users-boun...@lists.digium.com] On Behalf Of John Timms Sent: Saturday, November 07, 2009 2:45 PM To: asterisk-users@lists.digium.com Subject: [asterisk-users] Help with concurrent VoIP calls 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. ___ -- Bandwidth and Colocation Provided by http://www.api-digital.com -- asterisk-users mailing list To UNSUBSCRIBE or update options visit: http://lists.digium.com/mailman/listinfo/asterisk-users ___ -- Bandwidth and Colocation Provided by http://www.api-digital.com -- asterisk-users mailing list To UNSUBSCRIBE or update options visit: http://lists.digium.com/mailman/listinfo/asterisk-users
Re: [asterisk-users] Help with concurrent VoIP calls
Hi Fred. The NIC chip is a Realtek RTL8101E, on the motherboard. Network is Bellsouth = modem/router = Asterisk Yes, I am using NAT (assuming you mean that the Asterisk server does not have its own public IP address) Endpoints are outside the network, just standard POTS phones. Vitelity is my SIP provider. By fast I mean the best Business DSL Bellsouth has to offer: Up to 6.0 Mbps downstream - Up to 512 Kbps upstream I've used iftop on my server while running calls, and I'm under 200 Kbps while my calls are running. John Timms On Sat, Nov 7, 2009 at 4:25 PM, Fred Posner f...@teamforrest.com wrote: On Sat, Nov 7, 2009 at 2:45 PM, John Timms johngti...@gmail.com wrote: 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) What kind of NIC are you using and what's the network config? ie Bellsouth - router - switch - you Are you NAT'd? Where are your endpoints connected? (locally, outside?) I have a very fast internet connection, so there is still plenty of bandwidth what is the specs for fast? ___ -- Bandwidth and Colocation Provided by http://www.api-digital.com -- asterisk-users mailing list To UNSUBSCRIBE or update options visit: http://lists.digium.com/mailman/listinfo/asterisk-users
Re: [asterisk-users] Help with concurrent VoIP calls
On Sat, Nov 7, 2009 at 4:45 PM, John Timms johngti...@gmail.com wrote: Hi Fred. By fast I mean the best Business DSL Bellsouth has to offer: Up to 6.0 Mbps downstream - Up to 512 Kbps upstream If you're running the GSM codec, 7 calls will hit around 200 Kbps. If you're running ulaw, 7 calls will hit over your max. The calculator Darrick linked to is a great tool. ___ -- Bandwidth and Colocation Provided by http://www.api-digital.com -- asterisk-users mailing list To UNSUBSCRIBE or update options visit: http://lists.digium.com/mailman/listinfo/asterisk-users
Re: [asterisk-users] Help with concurrent VoIP calls
By fast I mean the best Business DSL Bellsouth has to offer: Up to 6.0 Mbps downstream - Up to 512 Kbps upstream That almost sounds like an invitation to check out what business service your cableco offers. One thing to be aware of with DSL and cable modems is that there can be various ill effects as your line gets closer to its rated capacity; do not expect that you'll get a reliable 512Kbps upstream. VoIP is sensitive to loss, latency, and jitter. You may be able, for example, to only get 384Kbps reliably out of the link (before packet loss/jitter/etc wreck its suitability for VoIP). That's a good time to look seriously at a gateway package like pfSense that can prioritize certain classes of traffic while also limiting overall bandwidth. As an example, we noticed on the local business cable offering (2Mbps up) Shaped PL min avg max stddev 2.2M3 6.4 251 557 176 2.1M1 7.8 350 584 134 2.0M3 6.4 271 535 132 1.9M1 7 254 527 131 1.8M0 6 79 339 90 1.75M 0 5.9 14 92 11 1.7M0 5.4 13 77 10 1.65M 0 4.9 11 69 7 1.6M0 5.4 13 55 9 1.5M0 5.3 11 59 7 1.4M0 5 11 57 7 1.3M0 4.9 11 54 6 1.2M0 4.9 11 52 7 1.1M0 4.8 14 53 11 The max starts trending up after 1.6M (helps to graph it) and pretty much everything goes to hell after 1.75M. ... JG -- Joe Greco - sol.net Network Services - Milwaukee, WI - http://www.sol.net We call it the 'one bite at the apple' rule. Give me one chance [and] then I won't contact you again. - Direct Marketing Ass'n position on e-mail spam(CNN) With 24 million small businesses in the US alone, that's way too many apples. ___ -- Bandwidth and Colocation Provided by http://www.api-digital.com -- asterisk-users mailing list To UNSUBSCRIBE or update options visit: http://lists.digium.com/mailman/listinfo/asterisk-users
Re: [asterisk-users] Help with concurrent VoIP calls
How are you connecting your land line phones since this is where you have the problem? Also, I would not expect very many calls at the same time with that setup if each call takes 50K you can't get exactly the maximum anyway, maybe 80% of maximum. Hope this helps. Tom Moore tommym2...@gmail.com wrote: If you've got a bellsouth dsl connection because of the way their system works even with doing qos on the link you can really only do about 8 calls before you start to run into problems with their setup. Tom -Original Message- From: asterisk-users-boun...@lists.digium.com [mailto:asterisk-users-boun...@lists.digium.com] On Behalf Of John Timms Sent: Saturday, November 07, 2009 2:45 PM To: asterisk-users@lists.digium.com Subject: [asterisk-users] Help with concurrent VoIP calls 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. ___ -- Bandwidth and Colocation Provided by http://www.api-digital.com -- asterisk-users mailing list To UNSUBSCRIBE or update options visit: http://lists.digium.com/mailman/listinfo/asterisk-users ___ -- Bandwidth and Colocation Provided by http://www.api-digital.com -- asterisk-users mailing list To UNSUBSCRIBE or update options visit: http://lists.digium.com/mailman/listinfo/asterisk-users -- Your life is like a penny. You're going to lose it. The question is: How do you spend it? John Covici cov...@ccs.covici.com ___ -- Bandwidth and Colocation Provided by http://www.api-digital.com -- asterisk-users mailing list To UNSUBSCRIBE or update options visit: http://lists.digium.com/mailman/listinfo/asterisk-users
