These numbers cannot be used as an extension number since they serve a special purpose. The message "Pin is reserved." is encountered when using an N11 number as a user extension.
Some of the Reserved Extensions include: Using N11 Numbers as User Extension
211: Community information & referral service
311: Non-emergency police & other governmental services
411: Local directory assistance
511: Traffic & transportation information
611: Repair service
711: Telecommunications Relay Service
811: Business office & auto number feedback
911: Emergency
112: Emergency
999: Emergency
The system does not allow any extension on any U.S., U.K., or Canadian account to use extensions 911, 112, or 999 since these are reserved for emergency services. Unfortunately this restriction cannot be undone or overridden.
Some of the Reserved Extensions include: Using N11 Numbers as User Extension
211: Community information & referral service
311: Non-emergency police & other governmental services
411: Local directory assistance
511: Traffic & transportation information
611: Repair service
711: Telecommunications Relay Service
811: Business office & auto number feedback
911: Emergency
112: Emergency
999: Emergency
The system does not allow any extension on any U.S., U.K., or Canadian account to use extensions 911, 112, or 999 since these are reserved for emergency services. Unfortunately this restriction cannot be undone or overridden.

J.B. Ferguson, Champion
Kim, Alum
Kim, Alum
IT Department
Chris Verdin, Champion