> ## Knowledge Base Index
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> Use this file to discover available pages before exploring further.
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# What are add-ons, filters, and routing options in Call Flows?

|| This article covers Call Flow Actions. For Workflow Rules & Tasks, see: [Workflow rules and tasks: what's available and how they work](https://help.nimbata.com/en/article/what-workflow-rules-tasks-are-available-and-how-do-they-work-x9ok8b/).

Call flow actions are the building blocks of every call flow. 
They fall into three groups: Add-ons, Filters, and Routing Options.
Combine them in the Call Flow Builder to shape how each inbound call is handled.

### Add-ons

Add-ons layer features on top of a call without changing its destination.

**1. Mask Caller ID** 
It replaces the caller's real number with a designated tracking number.
agents always know which campaign or line the call came from.

**2. Record** 
It automatically records inbound calls for training, compliance, and quality monitoring. 
Callers are notified where required by law.

**3. Greeting** 
It plays a customizable audio message to the caller before the call connects.
E.g. "Thank you for calling, please hold while we connect you."

**4. Whisper** 
It plays a short audio cue only to the agent the moment they pick up, providing context such as the campaign source.
E.g. "Call from Facebook Ads."

**5. Call Survey** 
It presents an interactive voice survey to the agent after the call ends.
Agents can use it to rate quality or confirm lead outcomes.

### Filters

Filters inspect an attribute of the incoming call and branch the flow based on what they find.

**1. Caller ID Prefix** 
It reads the first digits of the caller's number (area code or country code) and can tag or route the call accordingly.
E.g. tagging Chicago calls with `[312]`.

**2. Keypad Entry**
It prompts the caller to press a key and routes the call down the matching branch.
E.g. "Press 1 for Sales, 2 for Support."

**3. Day of Week** 
It routes calls differently depending on which day they arrive.
E.g. Weekdays to the sales team and weekends to voicemail.

**4. Time of Day** 
It routes calls based on the time they arrive.
E.g. Business hours to live agents and after-hours to voicemail.

### Routing Options

Routing options decide where the call ends up.

**1. Dial** 
It connects the call to a single destination number.

**2. Multiple** 
It rings several destination numbers simultaneously.
The first to answer takes the call.

**3. Sequential** 
It rings destination numbers one at a time in a defined order until someone answers.

**4. Weighted** 
It distributes calls across destinations according to percentages you set
E.g. 70 % to Team A and 30 % to Team B.

**5. Hang Up** 
It ends the call immediately without connecting to anyone.

**6. Voicemail** 
It sends the call to a recorded mailbox so the caller can leave a message.

Detailed Guide: [**How to set up call flows**](https://help.nimbata.com/en/article/how-to-set-up-call-flows-1731pv5/) 
Detailed Guide: [**How to enable mask caller ID**](https://help.nimbata.com/en/article/how-to-enable-mask-caller-id-1pnet33/) 
Detailed Guide: [**How to enable a call recording**](https://help.nimbata.com/en/article/how-to-enable-a-call-recording-1dtkuq8/) 
Detailed Guide: [**How to set up call greetings**](https://help.nimbata.com/en/article/how-to-set-up-call-greetings-1wn6uuj/) 
Detailed Guide: [**How to add call whispers**](https://help.nimbata.com/en/article/how-to-add-call-whispers-105yzuh/) 
Detailed Guide: [**How to use the caller ID prefix filter for geo-routing**](https://help.nimbata.com/en/article/how-to-use-the-caller-id-prefix-filter-for-geo-routing-5ptln6/) 
Detailed Guide: [**How to add a keypad entry (IVR)**](https://help.nimbata.com/en/article/how-to-add-a-keypad-entry-ivr-lld4g6/) 
Detailed Guide: [**Day of the week: how to forward calls to different destinations**](https://help.nimbata.com/en/article/day-of-the-week-how-to-forward-calls-to-different-destinations-taisk4/) 
Detailed Guide: [**Time of day: how to forward calls to different destinations**](https://help.nimbata.com/en/article/time-of-day-how-to-forward-calls-to-different-destinations-cknifu/) 
Detailed Guide: [**How to route calls to multiple destinations**](https://help.nimbata.com/en/article/how-to-route-calls-to-multiple-destinations-9acfl6/) 
Detailed Guide: [**How to enable sequential call routing**](https://help.nimbata.com/en/article/how-to-enable-sequential-call-routing-1qv7dmz/) 
Detailed Guide: [**How to enable weighted call routing**](https://help.nimbata.com/en/article/how-to-enable-weighted-call-routing-1kr8mni/) 
Detailed Guide: [**How to set up and listen to voicemails**](https://help.nimbata.com/en/article/how-to-set-up-and-listen-to-voicemails-ts6ehv/)