- A landline phone line (can be POTs, cooper-based, Cable-based, or VoIP).
- Caller ID service active (e.g. the ability to read name & phone numbers on your existing handsets).
- An Internet connection (UBlocker version LAN requires an ethernet connection on your router or switch, UBlocker WL can connect via WIFI).
- You also need a regular phone or handset with CallerID display
- You also need a PC, smartphone or tablet to manage your device online.