# How can I use an external gong for additional signaling

**URL:** <https://community.mobotix.com/t/how-can-i-use-an-external-gong-for-additional-signaling/1385>\
**Category:** Getting started\
**Tags:** doorstation, howto\
**Created:** [June 28, 2019, 7:28am UTC](https://community.mobotix.com/t/how-can-i-use-an-external-gong-for-additional-signaling/1385 "2019-06-28T07:28:10Z")\
**Posts on this page:** 1\
**Page:** 1

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**Author:** ![Mx-MichaelS](https://yyz2.discourse-cdn.com/flex030/user_avatar/community.mobotix.com/mx-michaels/32/919_2.png) [@Mx-MichaelS](https://community.mobotix.com/u/Mx-MichaelS)\
**Post date:** [June 28, 2019, 7:28am UTC](https://community.mobotix.com/t/how-can-i-use-an-external-gong-for-additional-signaling/1385/1 "2019-06-28T07:28:10Z")

</div>

[Deutsche Version hier](https://community.mobotix.com/t/wie-kann-ich-einen-externen-gong-zur-zusatzlichen-signalisierung-verwenden/230)

If needed, a separate external gong can be triggered when someone rings at a doorstation. This can be done if there is a free signal output available on any MxBus module attached to the doorstation.

If no free signal output is available, e.g. a MX-OPT-IO1 module or a MX-232-IO-Box could be used. In these cases, an external power supply (e.g. a 12V DC bell transformer) is needed.

To trigger an external gong via a free signal output e.g. on a MX-OPT-IO1 module, configure this as below:

1. Make sure that the signal output (e.g. iLi) is not used in another way. After the autoconfiguration of a doorstation the signal outputs are set to a standard. This needs to be change via Admin Menu → Assign Wires → required signal output → Not connected.  
 ![Screenshot-2018-4-26%20T24MX-Mathias%20Administration%20Overview](https://canada1.discourse-cdn.com/flex030/uploads/mobotix/original/1X/6765798c1babfd80ef7c1d50fb0b9247059eef3d.png)  
 ![Screenshot-2018-4-26%20T24MX-Mathias%20Assign%20Wires](https://canada1.discourse-cdn.com/flex030/uploads/mobotix/original/1X/fca9c59221d734349f21e610a4a9462975dc14b9.png)
2. Create a new signal output profile at Admin Menu → Signal Out Profiles → Add new profile → IO Module: int. Lights with the settings “On on alarm with timer” and a Signal Output Duration of 2 seconds.

 ![Screenshot-2018-4-26 T24MX-Mathias Signal Out Profiles.png](https://canada1.discourse-cdn.com/flex030/uploads/mobotix/original/1X/9f9666930c44a667e96386b56f73546a7732d64d.png)

1. Link the signal input event “RingOK” with the signal output profile “Gong” at Setup Menu → Action Group Overview → Add new group → Edit → Event Selection: Internal: RingOK (alternatively select the signaling event of a specific bell button instead) → Add new action → Action 1: the previously created signal output profile (in our example: “Signal Out: Gong”).

 ![Screenshot-2018-4-26 T24MX-Mathias Event Overview.png](https://canada1.discourse-cdn.com/flex030/uploads/mobotix/original/1X/713d6d0a5cf37679f11b17abac7d3d3ca2695707.png)

 ![Screenshot-2018-4-26 T24MX-Mathias Action Group Details.png](https://canada1.discourse-cdn.com/flex030/uploads/mobotix/original/1X/f138b54ba7b065ba488fa210d7b56ff9d0299e8b.png)