How can I call an internal handset by voice dialling via the L800HX?

If you have assigned a name to an internal handset in the L800HX app, the L800HX app automatically generates a phone number in the contacts of your smartphone. If, for example, the INT1 handset in the L800HX app is named "living room", you will also find a contact with the name "living room" in the contact list of your smartphone. This phone number has 10 digits. The command would be: "Alexa, call living room."
Please note that each new contact (smartphone contacts) is only synchronized after the Amazo Alexa App has been opened, and can only then be called via voice dial via the L800HX.