If Communication Manager is non-authoritative, Communication Manager sends the INVITE with all digits back to Session Manager. Session Manager routes the call based on the authoritative domain. If Session Manager has routing administered for the digits, then the call routes accordingly. Else, Session Manager denies the call with 404 as No Route Found. The calling endpoint then plays a local failure tone. For example, an intercept tone.

Communication Manager does not receive an invalid number in an imsterm INVITE when Session Manager is configured correctly. Session Manager sends an INVITE to Communication Manager after validating the user number. Communication Manager treats the imsorig and imsterm cases consistently. missing period