2009/3/17 Gordon Henderson <[email protected]>: > On Mon, 16 Mar 2009, Gavin Henry wrote: > >> Dear all, >> >> I'm currently researching options for a MT asterisk gui/system for a >> small business centre that will have 12 units in it. Each unit will be >> configured for one extension. >> >> The system there will have a max of 12 concurrent calls to PSTN >> provided via an ADSL/SDSL link to our VoIP provider in the UK, using >> g.711, maybe g.729 dependant on networking costs. Fallback will >> be to 4 analogue lines should this go down. > > Gavin, > > You won't get 12 concurent G711 calls over a standard ADSL line in the UK. > If you're on an ADSL2+ service you may get up to 1.1Mb/sec upload speed, but > even then, 12 * 80 = 960Kb/sec which is really pushing it, so use G729, or > get that 2Mb SDSL line in. Make sure it's a decent ISP too. Using IAX will > give you a few extra channels though as the IP overhead is less.
Thanks. We're waiting to hear abou twhat we can provide. We use Gradwell for termination and their ADSL. DSL Premium M does 2.5 up, but I'll limit this to 10 calls to be safe. >> What is key is billing information and the ability for a receptionist >> to see all active calls and do transfers etc. Much like the Flash >> Operator Panel. Desktop Software may also be needed for this purpose >> or can be done via a traditional bank of lines on an IP phone >> accessory module. > > Have a look at: http://www.astassistant.com/ rather than FOP. Even has a > Linux client which is nice... Looks good. Just tested it on VirtualBox for box. >> If anyone has any ideas on the best way to put this together, I'm all ears >> ;-) > > The consultant in me says "Pay someone to do it for you" :) However it's not > that hard to do and setup if youve done something similar in the past - and > your budget is tight. If you know you're going to get more of these, then go > for it - spend your time on the software and front-end for the the first > one, then the rest are clones... Yeah. I normal use PBXinAFlash for this. Just the receptionist part that was missing and maybe add on a2billing. >> I was going to use an OpenVOX card and Dell T100 box, with 12 Aastra >> 53i phones. There's a £4k budget for this (still waiting for more >> into)which >> will include the networking connection and equipment. If I can afford it I >> normally go Sangoma with Echo cancellation, but as it's a fallback >> service, >> so I'm not bothered. > > When budgets tight - I've deployed a lot of Grandstream phones - might give > you a bit more breathing space if you use (eg) GXP280's for the client > phones and a GXP2000 + button box for the receptionist. Yeah, don't really like them though. I could go down to a 51i for £67 ex VAT. > You can save money by building your own hardware too. Atom mobo, 1GB of RAM > and an OpenVox card running oslec is still overkill for this. I mostly use > 1GHz VIA boards for these sort of projects with up to 60 extensions. What would that come in at? A Dell T100 is £300 ex VAT for 160GB, 1GB RAM and a Dual Core Intel® Pentium® E2220; 2.4GHz with 3yrs nxt bday. A 4 port FXO card is £126.95 ex vat. > Billings a PITA and other than what I've written myself, have never found > anything that works the way I'm happy with... Good luck! Thanks. >> I think I've covered everything. There will be many more business >> centres to come as this first project will be the blueprint one. The >> end goal is to also move this to a data centre and not have it on site >> with the pstn fallback options, but use redundant links to our DC. >> Like a mini-ITSP for our area. I haven't figured the receptionist part >> for that bit yet though ;-) > > Personally I'd stick the box on-site and have a central peering server or 2 > in the DC - well that's how I do it ;-) You'll struggle to get properly > redundant links in that budget range too - one JCB can ruin everyones day! Yeah, as I planned, but not for this project. _______________________________________________ -- 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
