You asked for a working solution using the Obi and 911, here is what I did
I asked my police department for the local direct number to the 911 emergency dispatch operators,
When I asked how can I know if this number actually connects to '911' operators,
the police officer said she tested it out by calling that number, and it did actually connect to 911 operators, the same operators that answer a '911' call. The only thing is, the operator will not know my location.
I'm using the '911' call routing RonR outlined here to call my local emergency dispatch number.
Physical Interfaces -> PHONE Port -> OutboundCallRoute:
{([1-9]x?*(Mpli)):pp},{(<#:>):li},{(<911:12341234567>):sp1},{**0:aa},{***:aa2},{(<**1:>(Msp1)):sp1},
{(<**2:>(Msp2)):sp2},{(<**8:>(Mli)):li},{(<**9:>(Mpp)):pp},{(Mpli):pli}
where 12341234567 is my local emergency 911 dispatch number.
To test '911', I placed my cell number in the Outbound Call Route, and dialed '911'
My cell phone rang.