When Basis Admins are working with IDocs they need to know following Tcodes.
SALE - This is used to Customizing IDoc Interface/Application Link Enabling ( ALE )
SM59 - Used to configure RFC connections
WE21 - Create/Change Ports used in IDoc Processing
WE20 - Used to define the Partner Profiles
BD64 - Used to define Distribution Model for IDoc Processing
BD10 - Used to send Materials
BD87 - Used to check the status of IDoc