4-14 Logging In Using a ModemGo to these sections for information you are interested in:z Introductionz Configuration on the Switch Sidez Modem Connection EstablishmentIntroductionThe administrator can log in to the console port of a remote switch using a modem through publicswitched telephone network (PSTN) if the remote switch is connected to the PSTN through a modem toconfigure and maintain the switch remotely. When a network operates improperly or is inaccessible, youcan manage switches in the network remotely in this way.To log in to a switch in this way, you need to configure the administrator side and the switch properly, aslisted in the following table.Table 4-1 Requirements for logging in to a switch using a modemItem RequirementThe PC can communicate with the modem connected to it.The modem is properly connected to PSTN.Administrator sideThe 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.Switch sideThe authentication mode and other related settings are configured on the switch. Refer toTable 2-3.Configuration on the Switch SideModem ConfigurationPerform the following configuration on the modem directly connected to the switch:AT&F ----------------------- Restore the factory settingsATS0=1 ----------------------- Configure to answer automatically after the first ringAT&D ----------------------- Ignore DTR signalAT&K0 ----------------------- Disable flow controlAT&R1 ----------------------- Ignore RTS signalAT&S0 ----------------------- Set DSR to high level by forceATEQ1&W ----------------------- Disable the Modem from returning command response and theresult, save the changesYou can verify your configuration by executing the AT&V command.
