Logging In Using Modem; Introduction; Configuration On The Administrator Side; Configuration On The Switch Side - 3Com 4200G 12-Port Configuration Manual

4

Introduction

Configuration on the
Administrator Side
Configuration on the
Switch Side
Modem Configuration
L
OGGING IN
The administrator can log into the Console port of a remote switch using a modem
through PSTN (public switched telephone network) if the remote switch is connected
to the PSTN through a modem to configure and maintain the switch remotely. When
a network operates improperly or is inaccessible, you can log into the switches in the
network in this way to configure these switches, to query logs and warning
messages, and to locate problems.
To log into a switch in this way, you need to configure the terminal and the switch
properly, as listed in Table 20.
Table 20 Requirements for logging into a switch using a modem
Item
Administrator side
Switch side
The PC can communicate with the modem connected to it. The modem is properly
connected to PSTN. And the telephone number of the switch side is available.
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.
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.
U M
SING ODEM
Requirement
The PC can communicate with the modem connected to it.
The modem is properly connected to PSTN.
The telephone number of the switch side is available.
The modem is connected to the Console port of the switch
properly.
The modem is properly configured.
The modem is properly connected to PSTN and a telephone set.
The authentication mode and other related settings are configured
on the switch. Refer to Table 76 in "Logging in through Telnet".