From the Hanwha TID-600R website, you can configure the button to call contacts in Sipelia™.
Under Intercom, go to the Recipient section.
In Recipient list, click Add.
The Add recipient dialog box opens.
In the Name field, enter a name for your recipient.
In the SIP address field, enter the extension that you want to call when the button is pressed. The format should be extensiontocall@SipeliaIPServerAddress.