System information

Troubleshooting Dialin Connections 16-345
Interpreting show line Output
Step 5 After successfully making the Telnet connection, enter AT and make sure the modem
replies with OK.
Figure 16-1 shows a typical Hayes-compatible modem command string. Be certain to
check the documentation for your specific modem to verify the exact syntax of these
commands.
Figure 16-1 A Typical Hayes-Compatible Modem Command String
Interpreting show line Output
The output from the show line line-number exec command is useful when troubleshooting a
modem-to-access server or router connection. Figure 16-2 shows the output from the show line
command.
Return modem to
factory defaults
Hardware flow
control
Best error
correction
Write
memory
Auto
answer
(1 ring)
DCD high on
carrier detects
Hangup DTR
Lock modem speed
Best compression
AT&F
OK
AT&F
S0=1
&C1 &D3 &K3 &Q6 &Q5 &Q9 &W