asterisk users - Jul 2007 - Asterisk and Hardware Requirements

Hello,

I would like to put 1 asterisk box in Country A and 1 asterisk box in Country B.

Let's assume :
- Asterisk box in country A = GWA
- Asterisk box in country B = GWB
- Calling party number (located in country A) = CgPNA
- Called party number (located in country B) = CdPNB
- Second Called party number (located in country B) = sCdPNB
- PSTN in country A = PSTNA
- PSTN in country B = PSTNB

The idea is:
The end user in country B will have 2 phone numbers : CdPNB and sCdPNB
CgPNA is dialling CdPNB through PSTNA.
The call will be intercepted by GWA.
GWA will process the call, will change the CdPNB to sCdPNB and direct it via
IP to GWB. If the quality of the call via IP is not really good, then I want
to redirect it through E1 lines via KPN which will be able to route the call
to GWB. GWB will then transmit the call through the PSTNB and will reach
sCdPNB.

First Scenario
--------------
GWA's requirements would be:
- 1 E1 port receiving the calls through PSTNA
- 1 E1 port connected to KPN to re-route the calls
- Asterisk? being able to map ~5000 CdPNB to sCdPNB
- Handling up to ~50 simultaneous calls
- Using G711, G.723.1 & G.729.a codec
- H323 and SIP compliant

GWB's requirements would be:
- 1 E1 port receiving the calls routed through KPN from GWA
- 5 E1 port connected to PSTNB
- Handling up to ~150 simultaneous calls
- Using G711, G.723.1 & G.729.a codec
- H323 and SIP compliant
- Asterisk managing the whole thing

Second Scenario
---------------
GWA's requirements would be:
- 5 E1 port receiving the calls through PSTNA
- 10 E1 port connected to KPN to re-route the calls
- Asterisk? being able to map ~50000 CdPNB to sCdPNB
- Handling up to 500 simultaneous calls
- Using G711, G.723.1 & G.729.a codec
- H323 and SIP compliant

GWB's requirements would be:
- 10 E1 port receiving the calls routed through KPN from GWA
- 50 E1 port connected to PSTNB
- Handling up to ~1500 simultaneous calls
- Using G711, G.723.1 & G.729.a codec
- H323 and SIP compliant
- Asterisk managing the whole thing

I was wondering whether Asterisk could handle each scenario and what kind of
hardware I would need to support each scenario.

I hope I've been clear enough in my explanations.
Looking forward for your comments/inputs.

Regards,
cam

On 7/11/07, Josh <mylist13 at gmail.com> wrote:
> The idea is:
> The end user in country B will have 2 phone numbers : CdPNB and sCdPNB
Wow... sounds like a fun setup!  Your question is probably a little
in-depth for the mailing list (as it depends on a lot of variables),
but let's see what we can do to at least get you pointed in the right
direction.
>
> First Scenario
> --------------
> GWA's requirements would be:
> - 1 E1 port receiving the calls through PSTNA
> - 1 E1 port connected to KPN to re-route the calls
> - Asterisk? being able to map ~5000 CdPNB to sCdPNB
> - Handling up to ~50 simultaneous calls
> - Using G711, G.723.1 & G.729.a codec
> - H323 and SIP compliant
OK, first of all you'd need 2 E1 ports in GWA -- something like the
Digium TE220P card if you've got a PCI Express slot, or the TE210P if
you've got a 3.3v PCI slot, or the TE205P if you've got a 5v PCI slot.
 You'd also need a TC400B card in the box to be able to G.723.1 (and
handle G.729A more efficiently).
> GWB's requirements would be:
> - 1 E1 port receiving the calls routed through KPN from GWA
> - 5 E1 port connected to PSTNB
> - Handling up to ~150 simultaneous calls
> - Using G711, G.723.1 & G.729.a codec
> - H323 and SIP compliant
> - Asterisk managing the whole thing
This would be very similar to the configuration for GWA, except that
you'd need 6 E1 ports (which you could get with a combination of a
2-port and 4-port E1 card).  You'd also want to make this a much
beefier box, as handling 150 simultaneous calls might bring a weak
server to its knees.
> Second Scenario
> ---------------
> GWA's requirements would be:
> - 5 E1 port receiving the calls through PSTNA
> - 10 E1 port connected to KPN to re-route the calls
> - Asterisk? being able to map ~50000 CdPNB to sCdPNB
> - Handling up to 500 simultaneous calls
> - Using G711, G.723.1 & G.729.a codec
> - H323 and SIP compliant
Doing 500 simultaneous calls on a single Asterisk server is probably
not the wisest thing to do.  I'd suggest you spread the load across
several Asterisk boxes (maybe across 4 boxes, each with a 4-port E1
card such as the Digium TE420P).
>
> GWB's requirements would be:
> - 10 E1 port receiving the calls routed through KPN from GWA
> - 50 E1 port connected to PSTNB
> - Handling up to ~1500 simultaneous calls
> - Using G711, G.723.1 & G.729.a codec
> - H323 and SIP compliant
> - Asterisk managing the whole thing
Again, connecting 60 E1s and handling 1500 simultaneous calls on a
single Asterisk box is a recipe for disaster.  You'll need to spread
the load across many servers to be able to handle that kind of
traffic.

-Jared