[OpenSIPS-Users] OpenSIPS as regional/national office solution

[Mark Sayer]

Here is one suggestion:
- single OpenSIPS & Asterisk at central office
- use Asterisk as gateway to PSTN (for all offices)
- connect remote office PBXs to central office using using multi-port
FXS gateways
- 110ms is no problem
- single system admin point, single cpu, 200 or more concurrent calls
- no admin, low cost at remote offices

Mark

On Sun, Jan 16, 2011 at 8:21 AM, Sean Kelly <skchopperguy at gmail.com> wrote:
> Hello all,
>  I am new to OpenSIPS but have a problem which I believe OpenSIPS can solve.
> Due to the power of OpenSIPS there are many ways to solve any particular
> issue it seems. I wondered if the expertise of the group would assist in
> pointing me in a relevant direction with regards to where to focus my
> education into a solution using OpenSIPS.
>  We currently have 10 very old pbx's, 1 at each office and these connect
> directly to the telco. As such, the calls between offices are charged
> long-distance. All offices have more than adequate Internet connectivity.
> What I would like to do is put * servers in each region where office phones
> will register with the central * and have those trunk to OpenSIPS which will
> direct internal calls between servers (free national calls), and also keep
> track of calls out to the PSTN to match/compare with telco billing. OpenSIPS
> will trunk to a CLEC providing inbound/outbound service. Some offices are
>>=40ms from head office, some are as high as 110ms.
> Goals: Single domain, regionally dispersed, free internal calls nationally,
> high-availability (region & national), single or load-balanced in/out from
> CLEC and bill tracking.
>
> Questions:
> ----------------
> 1. The CLEC charges trunk setup fees, so is it feasible to have all in/out
> PSTN calls going through OpenSIPS nationally so as to only have 1 or 2
> trunks with provider? (as opposed to 10)
> 2. Should I have 2 OpenSIPS in this scenario with each regional *
> trunking/fail-over to each or have 2 OpenSIPS+Asterisk setup regionally with
> each region trunking to CLEC? .. or both?
> 3. Which modules / combination of modules would you recommend I focus on to
> achieve the above goals?
> 4. CID is important as well, internal & pstn. Does OpenSIPS simply
> pass-through CID or do I need to look into scripting a solution for this to
> work like a traditional telco? (do not see CID passing in lab).
> 5. For inbound, how would I direct calls to the appropriate regional *
> server?
> 6. How would you break this down to ease the start of the complete solution?
> ie: focus on national inbound/outbound or regional first?
>  Presently I have graduated from the OpenSIPS_Live_DVD_VM to having OpenSIPS
> installed/setup & working with phones in my lab on Debian 5. Have been
> following the OpenSIPS telephony book and also watching videos and reading
> articles on opensips.org which have all been excellent resources so far in
> getting me through the basics.
>
>   Any suggestions on which modules or part of the solution I should focus on
> next? General comments / suggestions?
>
>
> Thanks,
> Skyler
>
>
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