Spam Filter

Telzio's Spam Filter uses the world's largest robocall intelligence database to analyze and score all incoming calls in realtime. 

You can configure rules to decide what Telzio should do with calls when their Spam Score passes a certain threshold. 

Rules can be applied for all incoming calls on your account, or individually on each of your phone numbers.


Account Wide Rules

Account Owners can create universal rules that apply to all phone numbers on the account from the Spam Filter section of the Account Settings page.

How to Create Account-Wide Spam Filter Rules

  1. Navigate to the Account Settings page, and scroll down to the Spam Filter section. You must be logged in as an Account Owner to access this page.
  2. Click on New Spam Filter Rule.
  3. Select a Threshold between 0 and 100, where 0 means "very unlikely" to be a spam call and 100 means "most likely". We recommend starting with 75 or higher, and lowering your threshold if you are still receiving too many spam calls.
  4. Select an Action to apply to the call if the spam score is over your threshold. For details on the different Actions, see Rule Actions below.
  5. Press Save Changes.

Creating Spam Filter Rules

You can create multiple rules for different Spam Score thresholds.

For example, you can set the system to automatically reject all calls with a spam score over 90. You can also, for example, set all calls with a spam score over 50 to display a warning message on your caller ID display, giving you the choice to answer the call or not. You can customize the message to say "Spam Likely", or some other text.  


Phone Number Specific Rules

Account Owners, administrators, and users with access to manage Plans & Numbers can set up Spam Filter Rules specific to individual phone numbers.

How to Create Phone Number Specific Rules

  1. Navigate to the Plans & Numbers page.
  2. Open the details for the plan containing the phone number and click on the number where you want to add a Spam Filter Rule.
  3. Click on Edit under Spam Filter.
  4. Turn on Enable Custom Rules.
  5. Click on New Spam Filter Rule.
  6. Select a Threshold between 0 and 100, where 0 means "very unlikely" to be a spam call and 100 means "most likely". We recommend starting with 75 or higher, and lowering your threshold if you are still receiving many spam calls.
  7. Select an Action to apply to the call if the spam score is over your threshold. For details on the different Actions, see "Rule Actions" below.
  8. Press Save Changes.

Rules configured for specific numbers will automatically override any settings you make for the entire account.


Rule Actions

You can specify different actions to take on calls when the Spam Score passes the Threshold. 

Reject

The call is automatically rejected and the caller will experience a busy signal. Calls that are rejected by the spam filter will not be charged to your account. 

Transfer

The call is transfered to another Call Flow instead of the existing configuration set as the called phone number's "Inbound Call Destination". 

Prepend CNAM

A text of your choosing is added before the caller's CNAM (Caller ID) and displayed to the Telzio user receiving the call. 

For example, if you add "SPAM" as the prepended text, and the caller's CNAM is "John Smith", then your users will see "SPAM John Smith" in their phone's display. 

Append CNAM

A text of your choosing is added after the caller's CNAM (Caller ID) and displayed to the Telzio user receiving the call. 

For example, if you add "SPAM" as the appended text, and the caller's CNAM is "John Smith", then your users will see "John Smith SPAM" in their phone's display.

Please note that some IP phones have a limit to the number of characters that can be displayed for incoming calls. If the caller's CNAM exceeds the number of characters your phone can display, the appended text will not be displayed. In this case it may be better to use the Prepend CNAM action.

Override CNAM

A text of your choosing displayed instead of the caller's CNAM (Caller ID) to the Telzio user receiving the call. 

For example, if you add "SPAM" as the text, and the caller's CNAM is "John Smith", then your users will only see "SPAM" in their phone's display. 

 

All calls are charged normally except for those caught by a Spam Filter Rule using the "Reject" action.

 


Identifying Spam Calls in the Call Log

Calls that trigger a Spam Filter Rule are marked with a red SPAM tag and easily recognized in your Call Log.

Spam Call in Call Log

 

From the call log, click on the call to find the Spam Score of the call in the "Call Details" section. You will also see which Action was triggered by your Spam Filter Rules.

If you are still getting too many spam calls after setting up your Spam Filter, you can use the Spam Score details for a call you would have wanted to filter and adjust the rules in your Spam Filter with a threshold lower than the spam score assigned to the call. 


Geographic Availability

Telzio's Spam Filter is available to all customers, but only calls originating from North America phone numbers, with the country code +1 are analyzed and assigned a Spam Score.

We are planning to expand the coverage to more countries in the future.


Price

As part of Telzio's fight against robocalls, we are making this feature available to all customers free of charge.