With the Conditional Call Extending feature, you can limit the type of calls that are extended to the cell phone when EC500 is enabled. You can administer the Conditional Call Extending settings and apply these settings to a specific application instead of the station as a whole. User can also set the Conditional Call Extending settings. Conditional Call Extending feature is used by the SIP and FMC applications such as PBFMC, PVFMC, and SPFMC. With the Conditional Call Extending feature, you can reduce the cellular use by restricting the unrequired calls which results in improved productivity.