Performance impact

Heavy use of the selection display mode might adversely affect system performance. Hardware buffers can overflow when you overuse telephone displays. Telephone hyperactivity checks are usually sufficient to control overuse of the display mode.

Security

When a user activates the Posted Messages feature from a remote access trunk, the user must log in as a remote user. When you log in as a remote user, you prevent unauthorized users from activating or deactivating this feature for telephones.

Serviceability

In the selection display mode, the telephone might go out of service if the user scrolls through the displays too quickly. Scrolling through the displays too quickly causes the telephone to be reset. Active calls are dropped. When a 2420, a 4620 or a 4630 telephone is out of service, the system clears the call log.

Time out

If no activity occurs within 60 seconds of the last action, the telephone automatically exits from the selection display mode. The following events occur:

• The LED for the feature button goes out. Or on telephones with feature icons, the feature icon changes to the off state.

• The displayed message is cleared.

• The display of any active call is restored.

  When the telephone is in the selection display mode, the timer is reset if a user presses:

• The feature button

• The Next button

• Any digit key

Silent ringing

While a telephone is in the message posting mode, the user hears a burst of ringing, and then the telephone rings silently. Silent ringing removes the ringing disturbance while the user can still answer the incoming call.