Filter
Top Products
Modem Signal and Line States
Signal and Line State Diagrams
DC-162
Cisco IOS Dial Technologies Configuration Guide
Closing Modem Connections
Note The modem cts-required command was replaced by the modem printer command in Cisco IOS
Release 12.2.
To configure a line to close connections from a user’s terminal when the terminal is turned off and to
prevent inbound connections to devices that are out of service, use the following command in line
configuration mode:
Figure 28 illustrates the modem cts-required command operating in the context of a continuous CTS
signal. This form of modem control requires that the CTS signal be high for the entire session. If CTS
is not high, the user input is ignored and incoming connections are refused (or sent to the next line in a
rotary group).
Figure 28 EXEC and Daemon Creation on a Line Configured for Continuous CTS
Command Purpose
Router(config-line)# modem cts-required
Configures a line to close connections.
Hang up
Idle state
CTS raised
high,
watching
DTR
CTS
CTS lowered or
network
connection
closed
CTS lowered
high,
watching
DTR
CTS
Close connection,
DTR low for
5 seconds
high,
watching
DTR
CTS
Incoming network
connection
DTR going
low
high,
watching
DTR
CTS
Create
daemon
User-typed
activation
character
Create
EXEC
Ready
Ready
and
active
Ready
and
active
CTS lowered
or exit
S1004a