I have this server I need to put to work. The option I have is to make it work as a small office PBX with SIP users and a Digium E1 Card for PSTN service. 24 SIP users and one E1 card in an Intel 945board (533 Front side bus) with 1GB DDR 533mhz of ram, one Pentium Dual Core 2.66 ghz (FSB 533MHZ) and two 80GB SATA disks. Can the box sustain the load? I can add another 1gb of ram if necessary. Just PBX and voicemail, no fancy sutff like call recording... maybe a simple autoattendant like "thank you for calling, please press one for...." -- ------------------------------------------------------------ Erick Perez Panama Sistemas Integradores de Telefonia IP y Soluciones Para Centros de Datos Panama, Republica de Panama Cel Panama. +(507) 6694-4780 ------------------------------------------------------------
On 6/12/06, Erick Perez <eaperezh@gmail.com> wrote:> I have this server I need to put to work. > The option I have is to make it work as a small office PBX with SIP > users and a Digium E1 Card for PSTN service. > > 24 SIP users and one E1 card in an Intel 945board (533 Front side bus) > with 1GB DDR 533mhz of ram, one Pentium Dual Core 2.66 ghz (FSB > 533MHZ) and two 80GB SATA disks. > Can the box sustain the load? I can add another 1gb of ram if necessary. > > Just PBX and voicemail, no fancy sutff like call recording... > maybe a simple autoattendant like "thank you for calling, please press > one for...." >If it is the latest gen of Digium firmware, I'd say the box is more than adequate, as is. -- Bird's The Word Technologies, Inc. http://www.btwtech.com/
There is not a formula, but I second the opinion that the config is adequate if the linux build behaves on the hardware (correct drivers, config, etc). The limiting factor is the E1, you will be able to handle a full E1 of traffic, with transcoding, with this box. This is not based on a formula, it is based on over a year of production experience in larger environments than you describe (4 T1s per box).> -----Original Message----- > From: asterisk-users-bounces@lists.digium.com [mailto:asterisk-users- > bounces@lists.digium.com] On Behalf Of Erick Perez > Sent: Monday, June 12, 2006 9:48 PM > To: Asterisk Users Mailing List - Non-Commercial Discussion > Subject: Re: [Asterisk-Users] Can this config sustain 30 users? > > BJ, when you say it is more than adequate, what do you do tocalculate?> there *must* be a way to at least tell if the motherboardboard/cpu > will achieve results. > I just don't want to install it and then after a 5th user going to > call someone the asterisk begin to crash due to lack of resuources. > > > On 6/12/06, BJ Weschke <bweschke@gmail.com> wrote: > > On 6/12/06, Erick Perez <eaperezh@gmail.com> wrote: > > > I have this server I need to put to work. > > > The option I have is to make it work as a small office PBX withSIP> > > users and a Digium E1 Card for PSTN service. > > > > > > 24 SIP users and one E1 card in an Intel 945board (533 Front sidebus)> > > with 1GB DDR 533mhz of ram, one Pentium Dual Core 2.66 ghz (FSB > > > 533MHZ) and two 80GB SATA disks. > > > Can the box sustain the load? I can add another 1gb of ram if > necessary. > > > > > > Just PBX and voicemail, no fancy sutff like call recording... > > > maybe a simple autoattendant like "thank you for calling, pleasepress> > > one for...." > > > > > > > If it is the latest gen of Digium firmware, I'd say the box is more > > than adequate, as is. > > > > -- > > Bird's The Word Technologies, Inc. > > http://www.btwtech.com/ > > _______________________________________________ > > --Bandwidth and Colocation provided by Easynews.com -- > > > > Asterisk-Users mailing list > > To UNSUBSCRIBE or update options visit: > > http://lists.digium.com/mailman/listinfo/asterisk-users > > > > > -- > ------------------------------------------------------------ > Erick Perez > Panama Sistemas > Integradores de Telefonia IP y Soluciones Para Centros de Datos > Panama, Republica de Panama > Cel Panama. +(507) 6694-4780 > ------------------------------------------------------------ > _______________________________________________ > --Bandwidth and Colocation provided by Easynews.com -- > > Asterisk-Users mailing list > To UNSUBSCRIBE or update options visit: > http://lists.digium.com/mailman/listinfo/asterisk-users
Your server is more than enough for 24 SIP users. Depends a bit on usage patterns, though, you should be fine. Erick Perez wrote:> I have this server I need to put to work. > The option I have is to make it work as a small office PBX with SIP > users and a Digium E1 Card for PSTN service. > > 24 SIP users and one E1 card in an Intel 945board (533 Front side bus) > with 1GB DDR 533mhz of ram, one Pentium Dual Core 2.66 ghz (FSB > 533MHZ) and two 80GB SATA disks. > Can the box sustain the load? I can add another 1gb of ram if necessary. > > Just PBX and voicemail, no fancy sutff like call recording... > maybe a simple autoattendant like "thank you for calling, please press > one for...." > >
Maybe you are over thinking it. I have 200 users on a quad Xeon 700 with 2 PRI's and we regularly have 40-60 channels up, no problem (believe me, if there was a problem I'd have 200 guys freaking on my head). I rarely see > 30% single-CPU usage, and that's only when Sendmail is invoked to send out a voicemail. But yes, transcoding and reasonable echocancel values is key. If you are connecting to the PSTN, ulaw all the way. If you are connecting to a provider, use the codec of your choice as long as your provider supports it, and make sure every phone and endpoint is set to use the same codec. I also have 30 IAX remote sites that support from 1 to 5 users, on P-II 233's. I use them because they are bulletproof and they are so cheap if something gets hosed we just throw it away and put in another one. Again, no problem Maybe try your cheapo machine and if it doesn't work try a better box. You already have the cheap machine, and the card will remain the same regardless of what box you use. -----Original Message----- From: Erick Perez [mailto:eaperezh@gmail.com] Sent: Tuesday, June 13, 2006 9:15 AM To: Asterisk Users Mailing List - Non-Commercial Discussion Subject: Re: [Asterisk-Users] Can this config sustain 30 users? Well thanks all for your responses. My original intention was to address the mistic know-how about machine calculations, and I still feel the shadows remain. Why? Because to achieve a 24 user PBX-only/One E1, I was going to install a Dual Xeon with 2 GB of RAM and a 3ware card runing RAID-1 with two sata3 disks. Now This thread tells me that my dual core pentium d (a 700$ computer) will do the work. (the other equipment costs about 3500.00$). I do realize that i must minimize transcoding (ulaw all the way) but you're telling me it will work for 24 users (let's say 30 for round numbers) all with SIP phones in an IP network. Below are some comments that i found googling and doing some calculations myself. I do not enforce or deny any of them, please feel free to tell me if Im wrong. (not confirmed)a- A voice channel takes 30mhz (60mhz in duplex mode). So A 2.66 Ghz CPU can sustain about 43 calls (2600mhz/60mhz=43calls), not taking into account other factors that may increase/decrease the number of calls at the same time. b- 24 users talking ulaw (-+ 80kbps per channel) consume 1920kbps and in full duplex they consume 3840kbps (about 3.75 megabits/s). c- To Calculate the bandwidth DDR memory can achieve (example PC4200) ,to get the transfer rate, multiply the width of the module (8 Bytes) by the rated speed of the memory module (in MHz): (8 Bytes) x (533 MHz/second) = 4,264 Mbytes/second or 4.2 Gbytes/second (34gigabits/s), hence the name PC4200 So, will all of this in mind, CPU Dual Core 533FSB, 2.66 Ghz speed DDR533mhz, One gigabyte. (2x512) Two Sata disks (each sata pumps 1.5 gigabits/s) Motherboard Intel 945 at 533FSB Means that the cpu,the ram and the board can achieve (see point b) about 34 gigabits of data transfer, but 24 users only generate 3.75 megabits. So this is more than covered. However if we take into account the lowest performing component on this system (the sata disks) we go down to 1.5gbits/s which still seems to be enough. Please please correct me if im wrong (or crazy) Thanks, References: http://en.wikipedia.org/wiki/Front_side_bus (bus bandwidth table) http://www.acme.com/build_a_pc/bandwidth.html http://www.lostcircuits.com/memory/ddrii/ http://bvio.ngic.re.kr/Bvio/index.php?title=Front_side_bus On 6/13/06, Mike Fedyk <mfedyk@mikefedyk.com> wrote:> Erick Perez wrote: > > I just don't want to install it and then after a 5th user going to > > call someone the asterisk begin to crash due to lack of resuources. > Check the wiki for SIP load generation tools you can use to test your > setup on any number of calls you like. > _______________________________________________ > --Bandwidth and Colocation provided by Easynews.com -- > > Asterisk-Users mailing list > To UNSUBSCRIBE or update options visit: > http://lists.digium.com/mailman/listinfo/asterisk-users >-- ------------------------------------------------------------ Erick Perez Panama Sistemas Integradores de Telefonia IP y Soluciones Para Centros de Datos Panama, Republica de Panama Cel Panama. +(507) 6694-4780 ------------------------------------------------------------ _______________________________________________ --Bandwidth and Colocation provided by Easynews.com -- Asterisk-Users mailing list To UNSUBSCRIBE or update options visit: http://lists.digium.com/mailman/listinfo/asterisk-users
Don't forget to be sure your power supplies are reliable, and if necessary redundant. Good point. I'm a Tier 1 server bigot, myself, although I have done rollouts in a clone 4U with *freakin good* redundant PSU's. Nuthin beats Tier 1 redundant goodness... -------------- next part -------------- An HTML attachment was scrubbed... URL: http://lists.digium.com/pipermail/asterisk-users/attachments/20060613/886dce91/attachment.htm
Erick Perez wrote:> I have this server I need to put to work. > The option I have is to make it work as a small office PBX with SIP > users and a Digium E1 Card for PSTN service. > > 24 SIP users and one E1 card in an Intel 945board (533 Front side bus) > with 1GB DDR 533mhz of ram, one Pentium Dual Core 2.66 ghz (FSB > 533MHZ) and two 80GB SATA disks. > Can the box sustain the load? I can add another 1gb of ram if necessary. > > Just PBX and voicemail, no fancy sutff like call recording... > maybe a simple autoattendant like "thank you for calling, please press > one for...."Let's just say that you shouldn't have trouble with four E1 lines in this system (as long as you have a hardware echo canceler). Even with software echo can, this hardware is overkill. I'd suggest getting the slowest processor available new (At least 1.5Ghz for AMD Athlon/Opteron and 2.xGhz for Intel P4/Xeon) and get redundant power supplies, ECC memory, RAID 1 or higher and a nice UPS. You may also think of looking at used previous generation high-end equipment. It still has all of the good engineering and redundancy, it just isn't new and in many cases you don't need the latest speedy equipment to handle the load. In many instances, the same money spent buying used high quality equipment will give you more reliability than buying cheap new equipment.