Which of the following uses both analog and digital formats?
A.
ISDN
B.
CSU / DSU
C.
DSL
D.
Modem
Which of the following uses both analog and digital formats?
Which of the following uses both analog and digital formats?
Which of the following uses both analog and digital formats?
Which of the following uses both analog and digital formats?
A.
ISDN
B.
CSU / DSU
C.
DSL
D.
Modem