This incoming call block device was designed to block call (s) from ringing your phone.  In Black list mode, this incoming call blocker device will block number (s) (up to 120 specific telephone numbers, prefixes or entire area codes).  In White list mode, it will only ring your phone(s) when specific phone(s) numbers or area codes call you.  This call blocker can also block “Private”, “Unknown”, “Out of Area” and “Anonymous” calls from callers using *67 or *68 to block their CallerID feature when calling you.

Call Blocker Features:

• - Capacity: Up to 120 IDs (ID = up to 16-digit telephone numbers or area codes)
• - No battery or power adapter needed
• - Remotely programmed by a touch tone telephone
• - DTMF & FSK compatible
• - ID length: up to 16 digits
• - Three (3) Rj11 ports: TEL1, TEL2 or Fax, LINE

Special Feature:  This unit can also block calls that show as Private Numbers, Unavailable, Out of Area or Anonymous.  Simply follow the instructions to add the last number received to the blacklist memory (instruction #3 in the manual).

Call Blocker Technical Parameters:

• - Operating Temperature: from 14°F to 113°F (-10℃  to +45℃ )
• - Humidity: from 10％ to 95％
• - Line Voltage:  DC 24V – 48V
• - Caller ID: DTMF, FSK, DTMF level: -5–45db, FSK level: -5–45db
• - Dimensions:  3.81″ wide x 2.6″ deep x .94″ high (97mm wide x 66mm deep x 24 mm high)
• - Model: IB-120

Call Blocker Applications:
Ideal solution to increase productivity and privacy in households & workplaces. Stop calls from nuisance callers, telemarketers, junk faxes, charity/nonprofit organizations, political fundraising or announcements, polls/surveys, collection agents, banks, lawyers, hospitals, credit cards companies, and many more

Call Blocker Model IB-120 Documentation:
-  User’s Manual & FAQs
- Compare Incoming Call Blockers

Related products: 
- Incoming Call Block PRO w/ LCD Display & Blacklist
- Outgoing Call Blockers