This device can block outbound dialing of any phone number including 911 emergency calls, expensive 411 directory service, etc. Ideal solution for households with persons that have Alzheimer or other mental illnesses. Easy to install and use! It has two (2) RJ11 sockets. Simply connect it to the LINE and to the PHONE, as shown in diagram.
▶ It works on any standard analog phone lines (PSTN and VOIP)
▶ Programming is done locally or remotely via the dialpad of any DTM telephone
▶ Line powered (no batteries required)
▶ Size: 4.2" x 2.5" x 1.1"
▶ Weight: 3 ounces
▶ FSK or DTMF compatible (PSTN and VOIP lines)
Disclaimer: In some states there are laws stating that you cannot block access to 911 calls. It's your responsibility to make sure you are not in violation of these laws.