I have a specialty "softphone" that I have that makes VoIP calls to a "SIP compatible VoIP internet account or PBX". It's working just fine using Callcentric. The issue I have is when my Internet connection fails it can no longer make calls. I need something that will fail-over to the PSTN. I would even be okay if it gave preference to the PSTN.
So can the OBi212 do the job? I know I can set it up to use Callcentric, but how would I get it to allow a local "softphone" to connect to it and make VoIP, or just PSTN, calls? I've attached a diagram of how I was thinking of connecting things.
Yes. Read http://web.archive.org/web/20160317011451/http://www.obihai.com/docs/OBi-VoIP-Device-Attach-Legacy-IP-Phone-Workbook-v1-0.pdf. The OBi212 is almost the same as the Obi202 with one PHONE port replaced by an OBiLINE.
You would register the OBi212 to your SIP service provider.
Register the softphone to the OBi212 as per drgeoff's post.
Setup a trunk group with your SIP service provider and the Line port (PSTN).
If your service provider is not reachable, the call will failover to the line port.
http://www.obihai.com/OBiDeviceAdminGuide#_Toc367543101