Information Technology Reference
In-Depth Information
Table 16-2 shows typical Modem State and Modem Hardware State strings from the output of the
show
line
command, and explains the meaning of each state.
Table16-2 Modem and Modem Hardware States in show line Output
Modem State
Modem Hardware State
Meaning
Idle
CTS noDSR DTR RTS
These are the proper modem states for
connections between an access server or
router and a modem (when there is no
incoming call). Output of any other kind
generally indicates a problem.
Ready
—
If the modem state is ready instead of idle,
there are three possibilities:
•
Modem control is not configured on
the access server or router. Configure
the access server or router with the
modem inout
line configuration
command.
•
A session exists on the line. Use the
show users
exec command and use the
clear line
privileged exec command to
stop the session, if desired.
•
DSR is high. There are two possible
reasons for this:
-
Cabling problems
—If your
connector uses DB-25 pin 6 and
has no pin 8, you must move the
pin from 6 to 8 or get the
appropriate connector.
-
Modem configured for DCD
always high
—The modem should
be reconfigured to have DCD high
only on CD
1
. This is usually done
with the
&C1
modem command,
but check your modem
documentation for the exact
syntax for your modem.
