Group listen enable/disable With this feature disabled: if a station user presses SPEAKER while on a call, the Feature Phone immediately turns off the handset and switches to hands-free mode. If enabled, the group listen feature is available system-wide. If disabled, it is no longer available. Default: Disabled. Field 2: Privacy release enable/disable With this feature enabled: if a station user presses a CO line key that is in use (lit red), the user will be immediately conferenced with the call in progress on that line. With this feature disabled: pressing an in-use CO line key has no effect. Default: Disabled.