Door functions
Initiating a Door Call (on an internal phone) 
Internal door number
Phone number
Internal door number
*Further help under Door functions
Opening a Door (on an internal phone) 
R > #
R
Flash key or Query key
Additional information
Authorisation required
*Further help under Door functions
Initiating a Query Call from a Door Call (on an Analogue internal phone) 
R > Internal door number
R
Flash key or Query key
Phone number
Internal number of the group or user
or
External number (for exchange line request type Internal phone: with preceding exchange line access number)
*Further help under Door functions