1- create a user "park" with extension 50*600 (example) = device type 5020ip
2- in call handling -> call park :
default paging type : direct paging
default number : 50*600
call park timeout : recall the parker
3-in the COS of users :
call park timer : 600 (example)
call park-allowed to park : yes
4- create 2 keys for users :
key 1 : line type (call park) - button directory number : 50*600
key 2 : line type (call park-Retrieve - button directory number : 50*600
when you receive a call , press the 1st key you will see 50*600@XX
xx = the position ( 27 for example)
to Retrieve you call , press Key 2 then dial the position xx ( 27 in our example)
You have 600 seconds to retrieve your call , if not the phone will ring again.
I can't do better :-)
For Micollab : use the park and retrieve park FAC