ZyXEL SHDSL Router 791R 91-004-247008B Manual Do Utilizador

Prestige 791R G.SHDSL Router 

Firmware and Configuration Maintenance 

 

15-5 

4.  You have an SMT console session running. 

The Prestige supports the up/downloading of the firmware and the configuration file using TFTP (Trivial 
File Transfer Protocol) over LAN. Although TFTP should work over WAN as well, it is not recommended. 

To use TFTP, your computer must have both telnet and TFTP clients. To backup the configuration file, 
follow the procedure shown next. 

Step 1.  Use telnet from your computer to connect to the Prestige and log in. Because TFTP does not 

have any security checks, the Prestige records the IP address of the telnet client and accepts 
TFTP requests only from this address. 

Step 2.  Put the SMT in command interpreter (CI) mode by entering 8 in Menu 24 – System 

Maintenance. 

Step 3.  Enter command “sys stdio 0” to disable the SMT timeout, so the TFTP transfer will not be 

interrupted. Enter command “sys stdio 5” to restore the five-minute SMT timeout (default) when 
the file transfer is complete. 

Step 4.  Launch the TFTP client on your computer and connect to the Prestige. Set the transfer mode to 

binary before starting data transfer. 

Step 5.  Use the TFTP client (see the example below) to transfer files between the Prestige and the 

computer. The file name for the configuration file is “rom-0” (rom-zero, not capital o). 

Note that the telnet connection must be active and the SMT in CI mode before and during the TFTP 
transfer. For details on TFTP commands (see following example), please consult the documentation of your 
TFTP client program. For UNIX, use “get” to transfer from the Prestige to the computer and “binary” to set 
binary transfer mode. 

The following is an example TFTP command: 

tftp [-i] host get rom-0 config.rom 

where “i” specifies binary image transfer mode (use this mode when transferring binary files), “host” is the 
Prestige IP address, “get” transfers the file source on the Prestige (rom-0, name of  the configuration file on 
the Prestige) to the file destination on the computer and renames it config.rom. 

The following table describes some of the fields that you may see in GUI-based TFTP clients.