Thanks to all who have helped me get an answer especially Proftech. I had already looked at spkall but I'm in Pennsylvania. Since porting can take a few weeks to a month I want local friends to be able to reach us during the switchover duration. I could give them our cell numbers but would prefer not to because people tend to call the cell # once they have it. We also have limited cell phone minutes and only use cell phones when out of the house. Since we're retired were often home. Don't need smartphone with internet access as I can use the Internet via wifi hotspts on my tablet. We prefer our current land line system since all the wireless phone sets support speaker phone operation and my wife, who wears hearing aids in both ears, hears much better on speaker phone. OneSuite, who we have been using for LD service and with whom we already have credit on our account, offers a short term option which I may use.
Dave