On Sun, Jan 29, 2006 at 05:24:12PM +1000, Rob Thomas wrote: > The question is somewhat ludicrous, and I'm slightly surprised that > no-one has sat down and done the maths about bandwidth utilization. So I > did. > > > > To handle 5000 calls coming in over a PRI, you'd need 210 or so T1s or > 170 E1's. Yes. > > All of those would generate 320Mega BYTES of data per second (eg, > 32Gigabit/sec) No.
Using G711A (ie, "worst case" bandwidth wise): it's 64kbit/s not 64Kbyte/s so it's 320Megabits per seconds Using g729 it's a lot less. And even if it was 320Megabytes/s that equals a little over 3Gbps not 32. > > > > There is no way possible that you're going to pump that amount of data > through a PC. Don't care about codecs and dialplans, PC's just don't > have that sort of internal bandwidth from peripherals. Well, with your above miscalculations, no. But 3.2Gbps is possible with a few boxes. And there are PCs with at least four different PCI-X buses, that's 4GB/s so it might even be possible with one machine. Anyway, it's still a lot of calls. > > > If you do, honestly, need to handle 5k calls, you'd probably have to > have a bank of Cisco 5850s doing the termination - With a max of 5 DS3 > (1 DS3 = 28 T1's) into each one, you'll need 8, or probably 9 as you'd > want to have one as a hot spare. Each of those DS3's would go into some > beefy switching fabric (note, that each one is producting 225mbit) and > you'd have some sort of asterisk box with huge internal bandwidth > handling each one. Cross connect all 9 asterisk boxes via 10Gbit > networks (note, you'll need PCI-16x 10g cards) and have a pair of > voicemail servers. I'd suggest a pair of big Sun boxes. > > > > Then, of course, you have the issue of getting the calls _out_ of the > asterisk machines. You've just doubled your bandwidth requirements, so > you'll need to double up on the asterisk machines, and split the network > up further. > > > > I'd take a guess that you could do it under USD$1million (just for > hardware) but I wouldn't be surprised if it was USD$10million. > > > > I'm happy to sell you any of this 8-) > > > > --Rob > > > > > > > > > > -----Original Message----- > From: [EMAIL PROTECTED] > [mailto:[EMAIL PROTECTED] On Behalf Of Vic > Sent: Sunday, 29 January 2006 1:16 PM > To: [email protected] > Subject: Re: [Asterisk-Users] 5,000 concurrent calls system rollout > question > > > > Hi, Zoa, > > yes, these calls are from SIP to SIP. We will have more than 3000 (more > like 5000)concurrent calls come into system and we will need to handle > them. > > We will also need an IVR function as well. > > I am not up to speed on Asterisk yet, so, I am a little bit confused by > all the different ways of doing it. Someone is talking about IAX: I > think it can only be used between Asterisk servers, right? > > In this particula rscenario we are getting calls as SIP directly from > carrier, so we will not need to do any conversion (I think). We just > route the calls to the destination, that's it. > > Any suggestions on how to proceed? Can Asterisk do it? > > I read somewhere that it takes about 30 MHz per one voice channel, so if > we want to have 5,000 calls, we will need 150,000 MHz? Thats like 50 3 > GHz machines... Not going to fly with our people. > > Or do 30 MHz are only necessary for transcoding? In other words, if it > comes in as SIP and we keep it that way, can we make it a bt more > feasible number? > > > > Zoa <[EMAIL PROTECTED]> wrote: > > > It can be done, are those 3000 calls sip to sip ? If so it could > easily > be done, if they are not sip to sip you will need a bunch of > servers. > > Zoa. > > Vic wrote: > > > Hi, > > > > we are currently considering different options for rolling out > a large > > scale IP PBX to handle around 3,000 + concurrent calls. > > > > Can this be done with Asterisk? Has it been done before? > > > > I really would like an input on this. > > > > Thanks! > > > > >----------------------------------------------------------------------- > - > > > >_______________________________________________ > >--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 > > > > > > _______________________________________________ > --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 > > > > _______________________________________________ > --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 -- Kristian Larsson, Net At Once AB Email: [EMAIL PROTECTED] Phone: +46 470 592717 Cell: +46 704 910401 _______________________________________________ --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
