DRAG DROP
Drag the components that make up Cisco fax relay and T.38 from the left and drop them under the appropriate category on the right.
Answer: 
Explanation:
Cisco fax relay is the oldest method of supporting fax on Cisco IOS gateways and has been
supported since Cisco IOS Release 11.3. Cisco fax relay uses Real-Time Transport Protocol
(RTP) as the method of transport. In Cisco fax relay mode, gateways terminate T.30 fax signaling
by spoofing a virtual fax machine to the locally attached fax machine. The gateways use a Ciscoproprietary fax-relay RTP-based protocol to communicate between them.
T.38 Fax Relay provides an ITU-T standards-based method and protocols for fax relay. Data is
packetized and encapsulated according to the T.38 standard. The encoding of the packet headers
and the mechanism to switch from VoIP mode to fax relay mode are clearly defined in the
specification.
http://www.cisco.com/en/US/docs/ios/12_3/vvf_c/voice_troubleshooting/old/vts_fax.html
