> On Wed, Apr 14, 2010 at 10:33 AM, Tonty T <[email protected]> wrote: > >> This is a solution they proposed, using GSM gateways, but it wont let me >> handle 1000 simultaneous calls, the other option was using an E1 but the >> cost would be too much to deploy 35 E1s to support that many calls. There >> might be a better way of doing it. >> >> > If you are planning on having 1000 simultaneous calls, you're going to be > looking at a hefty price tag one way or the other. Things to consider - if > you're going to have 1000 concurrent calls going out over VoIP trunks (SIP / > IAX / whatever), you need to have enough bandwidth to comfortably handle > that many calls (each g729 is 8Kb/s bandwidth (but you need to pay a license > fee for each channel of g729), each g711alaw is 64Kb/s, etc). That amount > of bandwidth won't be cheap, plus the cost of the ITSP giving your 1000 > concurrent channels to call on. On the other hand, if you have a bank of > E1's, which support (I think) at max 30 concurrent voice channels, you'd > need 34 available E1 spans. I'm not sure if you can get 34 spans working in > a single asterisk server (there was some discussion about this recently on > this list), and you'd have the cost of 34 E1 spans as well.
All good points. It might be worth mentioning that including IP/UDP/RTP packet overhead, actual bandwidth is 40 kbps for G729 and 96 kbps for G711. -Jeff -- _____________________________________________________________________ -- Bandwidth and Colocation Provided by http://www.api-digital.com -- New to Asterisk? Join us for a live introductory webinar every Thurs: http://www.asterisk.org/hello asterisk-users mailing list To UNSUBSCRIBE or update options visit: http://lists.digium.com/mailman/listinfo/asterisk-users
