Yes, at the very least 911 (US) / 112 (EU) run on that system. For SIP numbers routing depends on the address you set up in the phone provider's portal, so if y

Yes, at the very least 911 (US) / 112 (EU) run on that system. For SIP numbers routing depends on the address you set up in the phone provider's portal, so if you're using bring-your-own-SIP to provide landline phone service in your house, you absolutely have to keep the address current or you risk dialing 911 and ending up on the dispatch of your old addres...