Termination SIP Domain (we just created one!).To make this entire SIP thingy work, we need to add a SIP trunk to Twilio, and instruct Twilio to use this SIP trunk for all incoming and outgoing calls. If this username is not the same as your phone number, you'll get an error along the lines of "No route exists, aborting" (you can check this by SSHing into your UDM-Pro, running unifi-os shell, then fs_cli and making an inbound call).īYOC stands for "Bring Your Own Carrier", which is what we are doing here. Apparently, when there's an inbound call, Unifi Talk will use the username to route the call to the correct phone/user/extension. Note: This username = phone number without + is one of the biggest missing pieces in every doc I've found on the subject. Leave everything else as-is, save, and let's deal with the SIP BYOC part.
You'd need to add an external IP address of your UDM (or upstream router), and for credentials, use your phone number as username (with country code, without +, e.g. This part is pretty straightforward, and you could just use the default settings except for the IP address and credentials.
You'll have something like as your SIP domain. There, in "Manage" section we'll create a SIP domain. With this new phone number in hand, head over to Voice services. You can sign up for a free trial at and buy a phone number (it's $1).
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