When the Extension to Cellular feature is enabled, a mobile phone user can activate certain Communication Manager features by dialing a Feature Name Extension (FNE). Each FNE requires a direct inward dialing (DID) number. You must create the FNEs that comply with the dial plan administered systemwide.

With the Additional Security for an EC500/One-X Mobile Lite call (AEFSC) feature, when a user makes an FNE call from a mobile phone, the system authenticates the call with the station security code (SSC). Communication Manager provides a high-pitched tone to prompt the user to enter the SSC. The call fails without a valid SSC.

When a user wants to make an EC500 call, the caller must dial the SSC after the FNE number. For example, <FNE> [Dial tone] <SSC> # [Dial tone or confirmation tone] <Subsequent digit or extension> #. If a caller wants to activate or deactivate a feature using FNE, the caller must dial SSC after the FNE number. For example, <FNE> [Dial tone] <SSC> # [Confirmation tone or error tone].

For more information, see Setting up Feature Name Extensions set.