The Ability to Place Fraudulent Calls, as Well as the Amount

Multiple Choice

The ability to place fraudulent calls, as well as the amount of bandwidth needed to carry the signaling information, are two common problems associated with which form of in-band signaling?

A) single frequency signaling (SF)
B) multifrequency signaling (MF)
C) ear-to-mouth signaling (E&M)
D) all are susceptible to these problems most of the time