Showing the SIP Trunk Secret Key
To access the SIP trunk secret key, please follow these steps: First, go to Apps, then select Google Workspace followed by Google Voice. Next, click on More and choose SIP trunks. Select the desired trunk (e.g. sbc1.anynodesbc.com) and then click on SHOW SECRET KEY.
The secret Key must be properly set through the assistant, see Google Voice-specific Settings, or directly in the SIP User Agent configurations of the Google Voice Node.
Below is a screenshot that provides an example of the configuration details mentioned in this TechNote.
Screenshot: Google Workspace Admin Console showing the secret key of anynode's SIP trunk in Google Voice.