3com 5500-ei pwr Instrução De Instalação

 

4-1 

Go to these sections for information you are interested in: 

z 

z 

Configuration on the Switch Side 

z 

Modem Connection Establishment 

The administrator can log in to the console port of a remote switch using a modem through public 

switched telephone network (PSTN) 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 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, as 

listed in the following table. 

Table 4-1 Requirements for logging in to a switch using a modem 

The PC can communicate with the modem connected to it. 

The modem is properly connected to PSTN. 

Administrator 
side 

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. 

Switch side 

The authentication mode and other related settings are configured on the switch. 
Refer to 

 

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