Seems that for the last 6 years, my Obi blows up the phone port once a summer. First in the Obi100, now with the Obi200. Of course, it did it on the 1 year anniversary plus one day, so it's out of warranty. It always happens when there's a nearby lightning strike, and I've installed a fair amount of protection. I'm looking for suggestions on what else I can do. First, my configuration:
The local DSL phone line runs through a surge protector to a DSL splitter/filter. A two line AT&T wireless base unit has line 1 plugged into the DSL filter's phone jack, and line 2 is plugged into the Obi200. The DSL jack on the filter is plugged into the modem/router, and the Obi Ethernet port is plugged into an Ethernet switch daisy chained off the router. The entire house is protected at the power service entrance by a Square D whole house surge protector. The two line AT&T phone's power adapter, router and switch are all plugged into a UPS with surge protection.
So I think I'm covered for surges coming in from the phone and power lines.
Only other path I can think of is security cameras with outside wiring behaving like an antenna delivering a surge to the video recorder, which then passes through its Ethernet cable to the router and then on to the Obi. But none of the other equipment malfunctions, and the Obi Ethernet port is fine as the device shows up in the ObiTalk dashboard.
I'm really at a loss to understand why the phone port appears to be so vulnerable, and what else I can do to protect it when there's a big flash/bang near my house.
Any suggestions would be appreciated.
Thanks
ps: I'm in Mexico, not the US, so getting replacements takes a while and is costly. I'm good with a soldering iron if anyone can point me to any simple component that might be replaced. I've checked the two fuses, F1 and F2, and they're OK.