Support Phone Call Blocking Devices

Learn more about Call Blocking devices

CPR Call Blocker devices such as the CPR Call Blocker V5000 and the CPR Call Blocker Shield stop unwanted nuisance calls such as scam calls and robocalls from reaching your phone. They include a list of known problem telephone numbers and allow you to add additional numbers to block.

You can purchase the CPR Call Blocker V5000 or CPR Call Blocker Shield at the Verizon Accessories Store. If you need more information, call the CPR Call Blocker customer care team at 408.872.6822.

CPR CALL BLOCKER V5000

CPR Call Blocker V5000

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CPR CALL BLOCKER SHIELD

CPR Call Blocker Shield

Download user guide

Frequently asked questions

  • Do I need Caller ID for this product to work?

  • Yes, Caller ID must be enabled on your phone line by your provider for the product to work effectively. Without Caller ID, the Call Blocker will block ALL calls.

  • Will the CPR Call Blocker work on any telephone?

  • Yes, the CPR Call Blocker will work with a wide range of telephone equipment, including corded analog phones and cordless DECT phones.

  • Do CPR Call Blocker products work on lines from all network providers?

  • Yes, The CPR Call Blocker will work on all standard domestic telephone lines from the main US telephone providers.

  • How much power does the CPR Call Blocker use?

  • The CPR Call Blocker uses very little power from your telephone line. If you have copper line service, the power comes from your service provider.

  • I have a Personal Panic Alarm. Will the CPR Call Blocker affect it?

  • No, it won’t. The major suppliers of panic alarm devices have all indicated that their products are compatible with CPR Call Blocker. They do request that when you purchase one, you give them a call to let them know that you are connecting a call blocker device to it.

  • Can I manually configure the CPR Call Blocker?

  • Yes, you can manually program the CPR Call Blocker. However, using the unique CPR “BLOCK NOW” button is the easiest way to block an unwanted number.

  • Does the CPR Call Blocker work with answering machines?

  • Yes, The CPR Call Blocker shouldn’t interfere with your answering machine’s functions, but if it does, you can adjust the number of rings required for the machine to work. We recommend setting your answer machine to five rings or less.

  • Can I use CPR Call Blocker in my office?

  • It doesn't work directly on Digital PBX Hybrid switchboard systems, but it will work on systems where an analog handset is plugged into the call group. Email us for more information regarding this at support@cprcallblocker.com.

  • Can I use the CPR Call Blocker with extension telephone jacks?

  • Yes, you can, but issues may occur. If you need multiple landlines around the house, we suggest that you use a Digital Enhanced Cordless Telephone (DECT). The DECT provides multiple cordless handsets connected to the main base station at the master socket.

  • I have friends and relatives overseas. Will the CPR Call Blocker block their calls?

  • No, they will only get blocked if you manually program the unit to block all international calls.

  • I have friends and relatives who withhold their numbers. Will the CPR Call Blocker block their calls?

  • No, they will only get blocked if you manually program the unit to block all withheld calls.

  • How many numbers can the CPR Call Blocker block?

  • It depends on which CPR Call Blocker model you have.

    • The Call Blocker V5000 has 5000 numbers pre-programmed in it and the ability to block another 1500 numbers
    • The Call Blocker Shield has 2000 numbers pre-programmed, along with the ability to block another 1500 numbers
  • The CPR Call Blocker seems to be blocking all calls. What could be the problem?

  • This is most likely due to not having Caller ID or Intermittent Caller ID on your line.

    It’s also possible that you have a faulty or poor-quality ADSL microfilter installed.

    • To fix this, try removing the microfilter and replacing it with a top-quality ADSL microfilter

    This problem can also be caused by having too many devices connected to your line. Try disconnecting extra equipment to see if that resolves the issue.

  • Will the CPR Call Blocker work with my broadband line?

  • Yes, the CPR Call Blocker will work with all types of broadband connections, whether fiber -optic or DSL. Just unplug your telephone and plug it into the CPR Call Blocker.