If your incoming calls are dropping off after one or 2 rings then the setup is obviously the cause here as you simply have too much plugged
in and are overloading the line and to find out which piece of this equipment
is at fault, it’s best to disconnect everything currently connected to all wall jacks/sockets in your home. For example:
Make sure there is nothing else plugged in the line like poor quality DSL filters, splitters, telephone extension cables, other phones in separate telephone wall jacks, alarm systems, Fax machines, Printers, TV Set Top Boxes, Credit Card Machines, Security Gates, etc.
Once everything is removed, reconnect the Call Blocker to the Main Wall Jack using the Standard (IN SERIES) Set Up – then reconnect your other devices one by one to help eliminate the problem.