Which two signaling messages would you see on a network containing both Cisco Skinny and third-party IP phones that are registered to a Cisco Unified Communications Manager?

Which two signaling messages would you see on a network containing both Cisco Skinny and
third-party IP phones that are registered to a Cisco Unified Communications Manager? (Choose
two.)

A.
off hook

B.
station invite

C.
invite

D.
invitation