64 CHAPTER 4: LOGGING IN USING MODEM
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The above configuration is unnecessary to the modem on the administrator side.
The configuration commands and the output of different modems may differ.
Refer to the user manual of the modem when performing the above
configuration.
Switch Configuration
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After logging in to a switch through its console port by using a modem, you will
enter the AUX user interface. The corresponding configuration on the switch is the
same as those when logging in to the switch locally through its console port
except that
■ When you log in through the console port using a modem, the baud rate of
the console port is usually set to a value lower than the transmission speed of
the modem. Otherwise, packets may get lost.
■ Other settings of the console port, such as the check mode, the stop bits, and
the data bits, remain the default.
The configuration on the switch depends on the authentication mode the user is
in. Refer to Table 6 for the information about authentication mode configuration.
Configuration on switch when the authentication mode is none
Refer to section “Console Port Login Configuration with Authentication Mode
Being None” on page 35.
Configuration on switch when the authentication mode is password
Refer to section “Console Port Login Configuration with Authentication Mode
Being Password” on page 38
Configuration on switch when the authentication mode is scheme
Refer to section “Console Port Login Configuration with Authentication Mode
Being Scheme” on page 41.
Modem Connection
Establishment
Step 1: Configure the user name and password on the switch. Refer to section
“Console Port Login Configuration with Authentication Mode Being None” on
page 35, section “Console Port Login Configuration with Authentication Mode
Being Password” on page 38, and section “Console Port Login Configuration with
Authentication Mode Being Scheme” on page 41 for more.
Step 2: Perform the following configuration on the modem directly connected to
the switch.
AT&F ----------------------- Restore the factory settings
ATS0=1 ----------------------- Configure to answer automatically after the first ring
AT&D ----------------------- Ignore DTR signal
AT&K0 ----------------------- Disable flow control
AT&R1 ----------------------- Ignore RTS signal
AT&S0 ----------------------- Set DSR to high level by force
ATEQ1&W ----------------------- Disable the modem from returning command response and the result,
save the changes
You can verify your configuration by executing the AT&V command.
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