SIP User Agent
The SIP User Agent node object in the anynode frontend consists of several RFC 3261-related sections like: RFC 3261 - SIP authentication, RFC 3261 - SIP URI/header field mapping, RFC 3261 - Registrations, RFC 3261 - Media negotiation, RFC 3262 - Reliable Transfer of SIP responses (PRACK), RFC 3311 - Update, RFC 3323 - Privacy, RFC 3325 - P-Asserted-Identity, and others. There can also be a Profile selected which is set by default to Standard.
One of Google's SIP Link requirements is the unique and proprietary SIP header X-Google-Pbx-Trunk-Secret-Key. In anynode's Google Voice node, this secret key is located in the SIP User Agent object.
If altered or yet not provided through anynode's assistant, as shown in Google Voice-specific Settings, the unique secret key of the anynode-related SIP trunk in Google Voice (see Showing the SIP Trunk Secret Key) must be copied and pasted here.
An example of the secret key location in the Google Voice node and its SIP User Agent settings is shown in the next screenshot.
