The Cisco CallManager dial plan architecture is set up to handle two general types of calls. What are they? (Choose all that apply.)

A.
External calls through a SAA Gateway

B.
External calls through a PSTN gateway or to another Cisco CallManager cluster

C.
Internal calls From the source router to the PBX-1

D.
Internal calls to Cisco IP phones registered to the Cisco CallManager cluster itself-

E.
Internal calls from the IPSoftPhoneto the 7200 VXR2

F.
External calls through the last downstream CallManager phone set.