[asterisk-users] SER/OpenSER as registrar to Asterisk (1500 SIP users)

[SIP]

While I can't help with OpenSER (OpenSER and SER are very different 
these days), the SER config info for SER 0.9.6 can be found in:

http://siprouter.onsip.org/doc/gettingstarted/

That will also help you to understand the config methodology.

The BASIC meshing Asterisk with SER is pretty straightforward. SER 
accepts the registration and the calls, and when it needs to forward 
something to Asterisk, you just add a forwarding/rewrite block to point 
to the extension(s) on Asterisk you need the SIP messages to go.

Some caveats (which may be different for OpenSER, so someone else can 
chime in):

SER doesn't do voicemail.  You'd need to either use a separate app 
called SEMS (which meshes with SER) or forward to Asterisk to handle 
voicemail (which works easily and well). Call Forwarding can be a bit 
tricky, but easy to handle in SER.  SER's 'billing' capability is... not 
ideal. It has no CDR engine of any kind, as it is just a SIP proxy. It 
has no concept of a whole call from start to finish... only the messages 
passed in a call (INVITEs, ACKs, BYEs, etc). While it will log all this 
information and allow you to piece together a call's start time and 
finish time, it is not what one might call elegant.

N.


Antoine Megalla wrote:
> Hi,
>
> I have a client who requires an Asterisk system with 1500 SIP 
> clients.All clients will have ATAs (mostly Grandstream), so I think a 
> single Asterisk server will not be able to handle all 1500 
> registrations, plus
> typical applications like Voicemail, call forwarding, etc.. and the 
> billing needs for all the clients.
>
> I have searched all over, and it seems that the perfect solution is 
> using SER/OpenSER as registration server for the SIP clients, and then 
> use Asterisk (one or more servers in load balancing mode) for 
> everything else.
>
> The problem is that I cannot find any configuration files for such a 
> setup. I can do all the Asterisk configuration, dial plan, AGIs, apps, 
> etc.. but for SER/OpenSER I cannot find anything.
>
> Can anyone please point me in the right direction, provide me with 
> OpenSER configuration, or any pointers on the subject. I tried to read 
> all the material on how to write configuration files for OpenSER, but 
> it is incomprehensible to me, and it is much harder that when I 
> learning Asterisk 3 years ago.
>
> Your help is much appreciated.
>
> Regards,
>
> Antoine Megalla.
>
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