So great to see their is such an active, friendly & knowledgeable community on ObiTalk Forums =).
@azrobert, Thanks that maybe the best short term solution for me while I do some reading . I could easily call route all suspicious numbers to the 2nd phone port with an answering machine. That way we don't miss anything potentially important and I can have a custom audio greeting with desired effect. Definitely added to my list of potential options.
@giqcass, Thanks for the Asteridex & Banana Phone info. It's a shame I bet the patents for defeating robodialers are owned by the robodialer manufactures too, so they could push for them to not exist. It's a doable project though so maybe something similar will resurface. You may still need to do your own adjustsments in Vinux for cursor size or system text, but the screen reader and other stuff work great, the screenreader voice can be a bit bothersome (like microsoft sam narrating window titles, every tab, button or box you click, ect,. there are some adjustments that can be made to the voice like pitch, speed, pronunciations), depending on your needs it maybe a trade off. Orca Screenreader is free, nicely integrated into the OS, and great for someone who can't shell out major money for similar windows software, or doesn't want to have to constantly pay for updates.
@noobee, double check your /boot/config.txt make sure you still have the right monitor settings, also that you aren't overclocked too much, some people release images with settings that were right for them personally. I know overclocking too much also causes errors in the SD card filesystem. I also never stop hearing about how a great PSU makes all the difference, can you ping/ssh into it, wonder if it's just thee screen turning off, or if that's just a symptom of another underlying problem? You might have to re-image your SD card. =S
Modem ----> Router (Ethernet port1)---->RaspberryPi
Router (Ethernet port2)---->Obi
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Line-In (PTSN)
They talk over IP addresses, they are both just mini computers, you would have to assign in the PBX a the virtual extension to the Obi IP address, and the Obi may need the PBX's IP in the config somewhere. I am not sure where or what the option is called as I have no experience installing a PBX yet, but it is just using your router to communicate between the two devices. My understanding is the Raspberry becomes sort of like a server (or a middleman for the Obi and your voice provider) and it just forwards them to the Obi over the network. There is no special cabling though as far as I know.
I managed to finish work early today so I will be testing out some of these suggestions =). If all goes well, I shouldn't have to tell the "Duct Cleaning" telemarketers, "I only have Canadian Geese" or "My ducks are cleaning themselves in the pond", they really hate that *laughs*
Thanks for the great info everyone, & good luck Noobee.
~NPH