That is the product SKU for the router, not the license. I looked up the data sheet for that router and from what I can tell there is no mention of voice services.
Firstly, it’s important to understand the purpose of having a SIP trunk on this router, especially considering this device doesn’t support any type of voice port or phone registration features.
As far as I know, these devices are typically used for security and wireless functions, not for voice.
Voice configurations cannot be performed on these routers.
