Help > Short Reference Phone > Functions listed alphabetically > Call Through
Call Through
Initiating a Call (on an external phone) 
Call Through number > PIN > * > Destination number
Call Through number
External number defined for Call Through on the PBX
PIN
Call Through PIN configured in the PBX
Destination number
Internal or external phone to be called
Internal number of the group or user
External number
Additional information
# after the destination number accelerates the dialling
*Further help under Call Through