Chapter 4. Monitoring System Operation
HS 2000 System Administrator’s Handbook
84
Communications
Modem control line parameters
Control line
Description
CTS
Clear to send (on or off).
DSR
Data set ready (on or off).
RI
Ring indicator (on or off).
+++
X.21 ASCII + DCE data treated like modem control
line (on or off).
FFF
Used in X.21 dialing. When FFF is off, the port is
in an idle state. When FFF is on, the port is
connected.