Thanks to Hans for a quick note on how simple it is to set up the Linksys PAP2 with Simon Telephonics’ Google Voice Gateway.
Start by returning the adapter to factory defaults.
Referring to the settings page that appears when you have successfully registered your Google Voice Gateway, configure the PAP2 as follows:
Line1 on Linksys PAP2
Proxy and Registration
Display Name: Your name
User ID: Username
Use Auth ID: Yes
Auth ID: Username
Make sure that the Info page shows the line1 status/registration state as “ONLINE.”