Good news, the phones, tested at 0733 CST 21 August 2015, appear to work on the outgoing limb, as well as incoming. No clue why this happened, but glad to have functionality back.
Was about to give up on y’all, and I really don’t want to. For a medical office there ARE a few challenges about which I think your marketing team should be more forthcoming, namely that fax functionality is somewhat limited (size and reliability seem to be issues with me now). Admittedly, WHO faxes anymore, right? Sadly, much of the medical industry still relies upon that archaic protocol.
To answer your last question, there was no audio either way on OUTGOING calls only. Incoming callls were fine. My perception is that the call connects (e.g. my cell will ring when I call it, but I hear nothing from either device when I talk, press numbers, etc.
I agree about the date of onset comment. Our office was functional on 18 August 2015 as late as approximately 16:30 CST. By the morning of 19 August, however, outgoing functionality had been interrupted.
My Ooma base station and the aDSL modem is locked in a rear closet for which I have the only key. I contacted Consolidated Communication (ISP) about interruptions to service or other changes, but they indicated none. Internet functionality does not appear altered. We use Spotify to stream music in the waiting area, and did not change this practice. I have QoS engaged, and, as noted, no filters or firewalls appear to be active on the modem/router. And the port scan of the base at 16:30 yesterday showed only UDP 123 denied, significance unclear to me.
Regardless, outgoing communication is restored now. I welcome your excellent perspectives if you have any to offer at this time. And thanks for helping me out over these past few days.