Everyone running Asterisk (including FreePBX or RasPBX which I have used for years) should definitely install "Lenny" and set it to silent and record. It is hilarious after decades that cold callers/scammers don't know about Lenny and even go with two rounds of the ducks before giving up.
I use an ancient Zoom ATA for SIP and VoIP with my RasPBX. It can even drive old fashioned rotary pulse dial phones. I have Siemens Gigaset DECT wireless phone. They must be from the 2000's. What I have found with VoIP is the modern phones are typical corporate office wired, not DECT. Everyone nowadays is using mobile.
