The Neilson Farm has tried without success to use both Cisco Fax Relay and T.38 faxing services with Cisco Unified CallManager Express. The only faxing service that seems to work is fax pass-through. Which port type is connected to their fax device?

A.
FXS

B.
FAX

C.
E&M

D.
ATA

E.
FXO