This function allows you to tell what type of call your phone is receiving by a distinctive ringing pattern.
Using the Distinctive Ringing Function
By default, internal calls are identified by a 1-burst ringing pattern, external calls by a 2-burst ringing pattern, and priority calls by a 3-burst ringing pattern. You can change these patterns if you wish. Please see your telephone's user manual for more information on how to change these patterns.
For additional assistance with this function, please contact the ITS Communications Services Group (CSG) at 213-740-3814 or email@example.com.