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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