On phones with a text display area next to the button, by default a=, b= and so on is displayed. This can be replaced by another label if required.
When the user is not connected to a call, the button indicated as selected is the button that will be used if the user goes off hook without pressing an appearance button. When a user is connected to a call, that call is the selected button.
The following table shows how the different states of call appearance buttons (alerting, held, etc) are indicated. This is a general table, not all phone button types are covered. The ring that accompanies the visual indication can be delayed or switched off. See Ring Delay.
Icon Button |
Dual LED Button |
Appearance Button State |

|
Red off, Green off. |
Idle The call appearance is not in use and is not currently selected. |

|
Red on, Green off. |
Idle + Selected The call appearance is not in use but is the current selected button that will be used if the user goes off hook. |
 Flashing icon. |
Red off, Green steady flash. |
Alerting The matching call appearance is alerting for an incoming call. This is accompanied by ringing. If the user is already on a call, only a single ring is given. |
 Flashing icon. |
Red on, Green steady flash. |
Alerting + Selected As above but Ringing Line Preference has made this the user's current selected button. |

|
Red on, Green on. |
In Use Here The user has a call connected on the call appearance or is dialing. |

|
Red off, Green on. |
In Use Elsewhere The call appearance button is in use on a bridged appearance. |

|
Red off, Green fast flash. |
On Hold Here The call has been put on hold by this user. |

|
Red fast flash, Green fast flash |
On Hold Pending Transfer Applies to 1400, 1600, 9400, 9500, and 9600 Series phones. |

|
Red off, Green intermittent flash. |
On Hold Elsewhere A call on a bridged appearance button matched to the call appearance has been put on hold. Calls on a call appearance that are put on hold by another user will continue to show connected lamp status, though the phone display will indicate a held call. |
 Icon flashes off. |
Red off, Green broken flash. |
Inaccessible The button pressed is not accessible. The call is still dialing, ringing or cannot be bridged into. |