Operation Manual – LoginH3C S3610&S5510 Series Ethernet Switches Chapter 4 Logging in Using Modem4-1Chapter 4 Logging in Using Modem4.1 IntroductionThe administrator can log into the Console port of a remote switch using a modemthrough PSTN (public switched telephone network) if the remote switch is connected tothe PSTN through a modem to configure and maintain the switch remotely. When anetwork operates improperly or is inaccessible, you can log into the switches in thenetwork 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 switchproperly, as listed in the following table.Table 4-1 Requirements for logging into 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 switchproperly.The modem is properly configured.The modem is properly connected to PSTN and a telephoneset.Switch sideThe authentication mode and other related settings areconfigured on the switch. Refer to Table 2-3.4.2 Configuration on the Administrator SideThe PC can communicate with the modem connected to it. The modem is properlyconnected to PSTN. And the telephone number of the switch side is available.4.3 Configuration on the Switch Side4.3.1 Modem ConfigurationPerform the following configuration on the modem directly connected to the switch:AT&F ----------------------- Restore the factory settings