You can enable Extension to Cellular applications with office telephone feature buttons. For example, you can administer feature buttons for enabling and disabling Extension to Cellular. You can also administer an optional timer for Extension to Cellular through the enable and disable feature button for H.323 and DCP phones. The Extension to Cellular feature button is available on telephones that support administrable feature buttons. With the Extend Call feature button, users can answer an Extension to Cellular call on the office telephone, and then move the call seamlessly to the cell phone.

The feature button will not enable or disable Extension to Cellular when a cellular service provider (CSP) or Service Provider Fixed-Mobile Convergence (SPFMC), application provides the Extension to Cellular capability.

The extend call button is available on wired office telephones. It is used to add the cell phone to an existing call at the office telephone.

For more information, see Administering a feature button to extend a call.