Configuring Ring Groups / Paging / Intercom

3CX Version 15

The Ring Groups / Paging features allow you to route calls to multiple phones at the same time, whereas the Paging feature allows you to make announcements to groups of people rather like a PA system.


Ring Groups

A ring group allows you to direct calls to a group of extensions. For example, you could define a group of three sales people, and have the general sales number ring on all three extensions at the same time or after each other. When you create a ring group, you assign it a virtual extension number. This will be the number used by the phone system to “address” the ring group. To add a ring group:

  1. In the 3CX Management Console, select Ring Groups > Add Ring Group.
  2. Now enter the ring group options:
  • Name – Enter a friendly name for the ring group.
  • Virtual extension number – Accept the default or specify a different one.
  • Ring strategy – Select the appropriate ring strategy for this ring group:
  • Prioritised Hunt – Start ringing on the first extension, then the second etc.
  • Ring all – All phones will ring at the same time.
  • Ring time – Specify how long the phones should ring for.
  1. In the section Group members add the extensions that should be part of this ring group. Move the extensions up or down to configure the priority of an extension.
  2. In the Direct Inbound Dialing section, optionally assign a DID number to the ring group.
  3. In the Destination if no answer section, you can define what should happen if the call does not get answered by the ring group.


Paging allows someone to ring a group of extensions and make an announcement via the phone speaker. The called party will not need to pick up the handset as the audio will be played via the phone speaker. The person paging will not hear any audio back from the people being paged. Both paging and intercom features require a phone that supports intercom and that is configured to allow it. To add a paging group:

  1. Click on Ring Groups and then select Add Paging.
  2. Now enter the ring group options:
  • Name – Enter a friendly name for the paging group.
  • Virtual extension number – Accept the default or specify an extension number.
  • Ring strategy:
  • Paging
  • Paging Multicast - Suitable for large paging groups. Requires phones to support multicast.
  1. In the section Group members add the extensions that should be paged.

To use the Paging feature you type the dial code plus the virtual extension number, e.g. *9800.

The user that will use intercom/paging must have has the right to do so. Go to Extensions > Edit Extension > Rights, and check the Can Intercom option.

You can configure the Paging dial code in Settings > Dial Codes.


The intercom feature allows a phone system user to make an announcement to a single extension. In this scenario the audio is two way, and the called party can respond immediately without picking up the handset. To call a user via the intercom function, add the paging/intercom prefix to the extension number. For example to make an intercom call to extension 100 you should dial: *11100 (if your paging dial code is *11).

You can configure the intercom dial code in Settings > Dial codes > Paging. The user that will use intercom must have the right to do so. Go to Extensions > Edit Extension > Rights, and check the Can Intercom option.