Which type of signaling is DTMF?

A.
Supervisory

B.
Route

C.
Informational

D.
Address

Explanation:

Start dial supervision is the line protocol that defines how the equipment seizes the E&M trunk andpasses the address signaling information such as dual tonemultifrequency(DTMF) digits.
Address Signaling Address signaling typically represents the digits dialed (called party’s number). There are two options used to pass address information. Either Pulse dial (rotary dialing) or Tone dial (DTMF) can be used. The default for Cisco routers and gateways is DTMF.