[3.09] This software version corrects a problem where the Caller ID from a new call would restart the Call Timer for the current call. The new call Caller ID would briefly display and the timer for the current call would restart from 0. In this new software, the caller ID will display until the call is answered or the outside caller hangs up. The Call Timer will then display again showing the correct duration.
Reference: A091009003
[3.09] If an extension user with Auto Call Timer enabled puts an outside call on Hold, and lets the call recall, the timer will restart if they answer the recall. If there is Caller ID for the call, the name will show on the second line of the display. In prior versions, the timer value would disappear from the first line of the display after the call recalling from Hold was answered.
Reference: A090113003