3Com Switch 4800G 24-Port Configuration Manual page 65

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The configuration commands and the output of different modems may differ.
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Refer to the user manual of the modem when performing the above
configuration.
It is recommended that the baud rate of the AUX port (also the console port)
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be set to a value lower than the transmission speed of the modem. Otherwise,
packets may get lost.
Step 3: Connect your PC, the modems, and the switch, as shown in the following
figure.
Figure 16 Establish the connection by using modems
Telephone line
Modem
Telephone number
of the romote end:
Console port
Step 4: Launch a terminal emulation utility on the PC and set the telephone
number to call the modem directly connected to the switch, as shown in Figure 17
and Figure 18. Note that you need to set the telephone number to that of the
modem directly connected to the switch.
Modem serial cable
Modem
PSTN
82882285
Modem Connection Establishment 65