911 is handled directly by the PHONE Port DigitMap and OutboundCallRoute.
You really should test 911. Call your local non-emergency fire or police number and tell them you would like to test 911 with a new telephone system you have installed. They should give you permission to do so. When you reach the 911 dispatcher, immediately inform him/her that there is no emergency and you received permission to make a test call. Verify that they have your correct identity and location.