Hey guys, im pretty new here, new to the discord and to SIP and telephony systems 😅 and I need some help. I have a SIP Endpoint and authentication given by a client of mine. and When I try to add it without checking the "Allow inbound calls" it works, But when I uncheck it, It returns 400 Bad parameter. Do I have to whitelist the IP provided by VAPI here https://docs.vapi.ai/advanced/sip/sip-trunk Because I read that auth is enough (I have the Domain/Realm and username and password).