System information

Interpreting show line Output
Book Title
16-348
Ready CTS DSR DTR RTS There are two possibilities for the presence of the DSR string
instead of the noDSR string in the Modem hardware state field:
• Incorrect cabling (either rolled MDCE, or straight MDTE, but
without the pins moved). See Table 16-2 for information on
the recommended cabling configuration.
• The modem is configured for DCD always high. Reconfigure
the modem so that DCD is only high on CD. This is usually
done with the &C1 modem command (see Figure 16-1), but
check your modem documentation for the exact syntax for
your modem.
Configure the access server line to which the modem is
connected with the no exec line configuration command. Clear
the line with the clear line privileged exec command, initiate a
reverse Telnet session with the modem, and reconfigure the
modem so that DCD is high only on CD.
End the Telnet session by entering disconnect. Reconfigure
the access server line with the exec line configuration
command.
Ready CTS* DSR* DTR RTS
2
If this string appears in the Modem hardware state field, modem
control is probably not enabled on the access server. Use the
modem inout line configuration command to enable modem
control on the line.
See Table 16-2 for more information on configuring modem
control on an access server or router line.
1 CD = Carrier Detect
2 A * next to a signal indicates one of two things: The signal has changed within the past few seconds or the signal is not being used
by the modem control method selected.
Modem State Modem Hardware State Meaning