Thanks for the suggestion - but there is a lot more I would like to explore in the VOIP area -so will be getting to OBITalk 110. Want to get the advantages of having VOIP with a fallback to a full PSTN system. Especially want to explore the area of "challenging" calls from unlisted numbers for a PIN code (so medical calls can get through but not scammers, marketers etc)
Thanks and regards