Which digital modulation method is used to transmit caller ID information on analog FXS ports on Cisco IOS routers?
A. DTMF
B. PSK
C. FSK
D. MF
E. pulse dialing
Which digital modulation method is used to transmit caller ID information on analog FXS ports on Cisco IOS routers?
A. DTMF
B. PSK
C. FSK
D. MF
E. pulse dialing