Prerequisites : this feature is available for users with a Functional Administrator role.

Log in to Io-base and click the button at the top right of your screen, highlighted below :

The Io-base administration page opens.

Go to the Referentials/On-call management menu.

Note : you must have subscribed to the on-call module and have the On-call management role to access this page.

Then, open the Phone number list :

This list will allow you to define additional phone numbers that are not associated with the on-call contacts. For instance, phones that might be shared among on-call staff.