The Conference and Barge-in tones provide more security for Extension to Cellular calls. During an Extension to Cellular call, a user hears a tone when the user picks up the office telephone that is mapped to the mobile phone.

When an office telephone is mapped to multiple applications, the Barge-join tone is played when a user bridges on to a call through a telephone mapped to the office telephone. The Barge-in tone is played only when the user uses the deskphone to bridge on to the call answered on Extension to Cellular device. The tone is played to all users connected on a call.

If additional security is required, administer one of the exclusion features. When you enable exclusion on a telephone, the security feature applies to all off-PBX applications on the telephone.

If the Additional Security for an EC500/One-X Mobile Lite call feature is administered, 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 station security code. The call fails without a valid SSC.