Embarrassed to say I'm still hacking away at this...
Update: At the request of Trendnet tech support (the router is a TEW-691GR) I have since:
- Updated the firmware on the router
- Hard reset the router
- Re-set the printer to obtain IP automatically.
- Confirmed that the printer is sending a wireless radio signal while in low power mode - it is - and it shows up on the router's "Station List" even though it can't be seen on the network or pinged.
No change in behavior. The printer drops off the network as soon as it goes into low power mode.
So I am focusing on the printer at the moment.
Epson has a utility (EpsonNet) for administrators to configure the printer's network settings. I installed this in order to set a static IP in the first place.
There are some additional settings that I could change if it would make any difference. Anyone care to take a look and tell me what you would suggest?
I plan on re-setting a static IP again. All setting shown here are default with the IP on Auto: