# User Groups

User Groups allow you to group multiple users together and assign a shared **Outbound Caller ID** to the group.

When an **Outbound Rule** is configured with a **Caller User Group** condition, the PBX applies the group’s outbound caller ID to calls placed by members of that group. Specifically, the PBX replaces the **user part of the `From` header** in the SIP `INVITE` message with the **User Group’s Outbound Caller ID**.

This feature is commonly used to present a **department-level caller ID** (for example, Sales or Support) instead of individual extension numbers.

***

### Create a User Group

To create a user group:

1. Navigate to **Call Manager > User Groups**.
2. Click **Add**.
3. Enter a **Group Name**.
4. Assign an **Outbound Caller ID** and select the trunk to be used.

In the example below, a user group named **Sales Dept** is created, with an outbound caller ID of **010000** assigned on the **CallCentric** trunk.

<figure><img src="/files/wwOwTDyGDo9djVeTcNv2" alt=""><figcaption></figcaption></figure>

***

### Create an Outbound Rule Using Caller User Group Criteria

Next, create an outbound rule that uses the **Caller User Group** as a matching condition:

1. Go to **Call Manager > Outbound Rules**.
2. Create or edit an outbound rule.
3. Set the **Caller User Group** criterion.
4. Select the previously created **Sales Dept** user group.

<figure><img src="/files/biGooFY7WW6d1wbPG4vP" alt=""><figcaption></figcaption></figure>

***

### Call Behavior

When an extension that belongs to the **Sales Dept** group places a call that matches this outbound rule:

* The PBX uses the **group’s outbound caller ID**.
* The outbound caller ID is inserted as the **user part of the `From` header** in the SIP `INVITE` message.
* The call is routed according to the outbound rule and associated trunk.

This ensures consistent, department-level caller identification for outbound calls.


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