You need to decide which codecs you are going to allow to be used on the
SIP side. As you are connecting to E1 then the standard codec would be
g711 alaw or ulaw. You could force the SIP side to use the same codec
but it uses about 100Kbps of bandwidth so quite a bit higher than other
codecs and some customers may prefer to use a higher compression codec
so they dont have to have a faster internet connection.
If you start allowing other codecs then asterisk will need to perform
codec translation which consumes CPU.
You will be limited by the E1 cards you can fit into asterisk. Generally
its best to keep to a maximum of 2 PCI cards in a server as they each
generate a lot of interrupts. A couple of Sangoma A116 will give you 32
E1 circuits which can handle 960 calls. That may well be pushing the
server to its limits of what it can do even if it is just handling basic
calls.
So you will want 3 of these systems and preferably four as you will want
some redundancy.
You would want something like opensips at the front end on a couple of
redundant servers. You can use the load balancing module in opensips to
spread the calls evenly between the available asterisk servers.
You should also have a think about whether you wish to use asterisk at
all. Opensips will do the load balancing that you need and can perform
the billing actions aswell. If all asterisk is doing is performing sip
to E1 conversion there may be hardware solutions which will be more cost
effective and require less maintenance.
On 20/12/13 10:08, bilal ghayyad wrote:
Thanks a lot for the help from the all.
Without using PBX functionalities (like conference or pickup and so
on), only basic calls. So how many concurrent calls can support?
The idea is, we need to use Asterisk with ISP which will be service
provider for sip calls for the subscribers, and the asterisk should be
connected with E1s to do calls within the country.
The registered users will reach up to 100 000 users and the concurrent
calls will reach up to 2000 or 3000 calls.
Appreciate the kindly advise.
Regards
Bilal
On Wednesday, December 18, 2013 6:10 PM, Tech Support
<aster...@voipbusiness.us> wrote:
You can have tens of thousands of phones as long as no one makes or
receives any calls J. The better question to ask is how many
concurrent calls have people been able to make. The quick answer is it
depends on many things.
John
*From:*asterisk-users-boun...@lists.digium.com
[mailto:asterisk-users-boun...@lists.digium.com] *On Behalf Of *bilal
ghayyad
*Sent:* Wednesday, December 18, 2013 9:46 AM
*To:* Asterisk Users Mailing List - Non- Commercial Discussion
*Subject:* [asterisk-users] Maximum number of users
Hello;
Can someone advise me what is the maximum number of users (IP Phones)
that can be supported by asterisk 1.8 or later?
Regards
Bilal
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