[asterisk-biz] Routing large call volumes (400 concurrent calls+)

[Dave Wallace]

The

AudioCodes Mediant 2000 with 16 Span E1/T1 is only 1U.

In the US it will handle 384 calls.

If you are in a high cost data center like equinix this may be the way to
go.



On 9/20/07, Josh Krueger <lists at vasttelecom.com> wrote:
>
>
> On Sep 20, 2007, at 12:45 PM, Steve Totaro wrote:
>
> > Mitul Limbani wrote:
> >> Hi Chris,
> >>
> >>
> >> Quoting Chris Bagnall <chris at minotaur.it>:
> >>
> >>> Greetings list,
> >>>
> >>> I've recently been approached by a traditional PSTN LCR provider who
> >>> are trying to break into the VoIP market and set themselves up. They
> >>> have good contacts with some of the large carriers here in the UK
> >>> who
> >>> are happy to install interconnects into the datacentre in which they
> >>> have rackspace.
> >>>
> >>> They're in a tricky position: they won't be generating anywhere near
> >>> enough volume to justify one of the big Cisco gateways (or similar),
> >>> but they will have sufficient volume to make PRI cards in asterisk
> >>> servers rather inefficient.
> >>>
> >>> Initially the main carrier offered to install 16 E1s as a starting
> >>> point for them, but:
> >>> a) as their call volume increases, having lots of E1 ports and
> >>> cables
> >>> seems incredibly inefficient compared to an E3 or TDMoE.
> >>> b) I can't help but feel asterisk might not be the most appropriate
> >>> solution for something of this scale
> >>
> >> I believe you can put up 16 E1s on to a single server and which
> >> runs asterisk.
> >> If you require any assistance on that front, do contact us.
> >>
> >> Thanks & Regards,
> >> Mitul Limbani,
> >> Founder & CEO,
> >> Enterux Solutions,
> >> The Enterprise Linux Company (TM),
> >> www.enterux.com
> >
> >
> > Obviously you cannot put 16 E1s on a single server.  And at least
> > in the
> > US, getting 16 T1s makes no sense.  It costs just as much as a T3
> > (28 T1s)
> >
> > You can do it, I would inquire about an E3 (I suppose there has to be
> > such a thing).  A T3 comes as two coaxial cables, one send, on receive
> > and would attach to a MUX to break out your E1s.
> >
> > Seven servers should do the trick.
> >
> > Thanks,
> > Steve
> >
>
> I agree fully.. To a point.
>
> Heres the thing, Ive worked on a platform that had well over 30 T1s
> across 10-15 servers for inbound. And another 10-15 T1s for outbound.
> Outbound were muxed into a T3. Having the inbound as individual E1s
> makes much more sense especially when they may be dealing with
> multiple carriers. 2-3 E1s from each carrier across the servers, etc
> etc. This takes care of failover if a server dies. Now if its all one
> carrier a demuxed E3 would be perfect.
>
> 7 servers is right at the mark I would have recommended (media
> gateways should be midrange 1u servers, gateways 1u or 2u with
> redundant power supplies). 5 with a quad port E1 card in each and 2
> to be SIP gateways and handle final CDR records, load balancing, etc.
> Will also need detailed logging on the first 5 servers as well. To
> have this all work happily, you will probably need some custom code.
>
> Asterisk is fine for handling this type of application. If you have
> any questions, feel free to contact me off list.
>
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