10.26.5.2.4. LDPLN 
ADD-LDPLN:LDP=911,LROUTE=91,LAUTH=1,SPC=22,PINDP=N;
Parameter description:
- PINDP No pin is required to reach the C.O for this dial pattern.
- LDP Configures the E911 call number "9""1""1"
ADD-LDPLN:LDP=911,LROUTE=91,LAUTH=1,SPC=22,PINDP=N;