Ringtones are used to define a simple ring class that is applied based on credentials carried within the network protocol.

The ring class includes parameters such as call-waiting and ringer index, if appropriate.

The ring class can use one of the following types of rings:
  • Ring Plays a specified ring pattern or call waiting indication.
  • Visual Provides a visual indication (no audio) of an incoming call, no ringer needs to be specified.
  • Answer Provides auto-answer on an incoming call.
  • Ring-answer Provides auto-answer on an incoming call after a certain number of rings.
    Note: that auto-answer for an incoming call works only when there is no other call in progress on the phone, including no other calls in progress on shared or monitored lines. However, if a phone initiates a call on a shared or monitored line, auto-answer works.