Instruction manual

Page 1200 of 3156 Controlled Class of Service
553-3001-306 Standard 10.00 January 2002
Feature operation
To activate CCOS, follow these steps:
1 Press CCOS.
Note that this is a toggle: If CCOS is already active, pressing the key will
change the CCOS state to inactive. Check the CCOS lamp to determine
if CCOS is already active.
2 Dial the Prime Directory Number (PDN) of the telephone to be changed
and press CCOS.
3 Press Rls.
To deactivate CCOS, follow these steps:
1 Press CCOS.
2 Dial the PDN of the telephone to be returned to its original Class of
Service and press CCOS.
3 Press Rls.