110 PTSN default
Mark.P:
I've read the discussion on the 110 'relay issue', but I'm still unclear if the 110 will reliably auto-default PTSN with a power/internet/voip provider failure.
QBZappy:
Mark.P,
Last I heard, the hardware relay switch is gone. However an OBi110 work around for this is to use a Trunk Group which includes the Li in the list. Trunk groups cycle through the available trunks (sip/pstn) until it finds an available trunk to make the call. If the internet is down, it should go out the line. The problem with that is if the power goes down this strategy will fail. The only way to be certain is to have a second phone connected directly to the co line, since the pstn supplies it own power.
ProfTech:
As QBZappy said, a using a trunk group could fix part of this problem. However, you would need to test to see if the "switchover" would be instantaneous. I have tried removing the ethernet cable and dialing [no trunk group] and it takes 50 seconds for the 110 to come back with a message so I don't know how it would work with a trunk group. Also, if your VOIP provider requires registration the trunk group idea probably won't take care of that.
As far as the relay goes, it can easily be replicated if you have some electronic expertise. Use a small 12v or 24v DPDT relay and any small "Ice cube" power supply similar to the one shipped with the Obi.
Probably not the simple answer you were looking for, but a couple ideas.
Mark.P:
Thank-you both, QBZappy and ProfTech.
My plan was to install the 110 inline with the RJ31X jack(security system)--telephone company interface. Dial-plan all local calls for pstn and LD calls on paid voip service.
While I have 3-Obi202 units in use, and I am not afraid of a little experimenting, this 110 configuration needs to function without fail or at least fail in a working state. I am surprised that the 110 is not engineered to fail safe to the pstn line.
It appears as though my plan to install the 110, for simple, low cost, trouble free service in both my parents winter(FL) and year round homes, is likely un-workable.
Rick:
Quote from: Mark.P on October 31, 2012, 03:57:05 pm
Thank-you both, QBZappy and ProfTech.
My plan was to install the 110 inline with the RJ31X jack(security system)--telephone company interface. Dial-plan all local calls for pstn and LD calls on paid voip service.
While I have 3-Obi202 units in use, and I am not afraid of a little experimenting, this 110 configuration needs to function without fail or at least fail in a working state. I am surprised that the 110 is not engineered to fail safe to the pstn line.
It appears as though my plan to install the 110, for simple, low cost, trouble free service in both my parents winter(FL) and year round homes, is likely un-workable.
Last paragraph summarizes it. Won't be trouble free. Will require someone with knowledge at times.
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