When does Communication Manager insert the shortcut flag during call processing?

Which event packages would you expect to see an AST Endpoint subscribe to?

A customer called Avaya Support stating that shortly after some maintenance work was done, they cannot make or receive calls.
Which command in Avaya Aura Communication Manager (CM) can the administrator execute, to determine if the links to the H.248 Gateways are up?

When viewing Avaya Aura Communication Manager (CM) trusted certificates, you notice that the Installed certificates are marked with either A, C, W, or R.
What do these letters stand for?

Which two types of Certificate need to be installed on Communication Manager (CM) to successfully establish a TLS connection with Session Manager?