3com 3031 Instruccion De Instalación

The major configuration tasks include:

■

Configure DCC operating parameters

 

■

Encapsulate the link layer protocol PPP and configure its authentication 
parameters, etc

 

■

Configure IP address

 

■

Configure the operating parameters of backup center if the interface will work 
as the master interface or the standby interface in the backup center

 

■

Configure address translation and packet filtering rules if a firewall should be 
set up on the interface

 

Refer to the related sections in this manual for details.

To guarantee the signal quality at the receiving end, you should set proper signal 
attenuation and waveform on the CT1/PRI interface depending on the length of 
the transmission cable to which the interface is connected.

Perform the following configuration in CT1/PRI interface view.

By default, the attenuation of transmission cable that the CT1/PRI interface 
matches is 

long 0db

.

CT1/PRI interfaces support two types of line code formats, namely, ami and b8zs.

Perform the following configuration in CT1/PRI interface view.

The line code format on CT1/PRI interfaces defaults to 

b8zs

.

When a CT1/PRI interface is working as DCE, chose the internal clock for it, that is, 

master

 clock mode. When it is working as DTE, chose the line clock, that is, 

slave

 

clock mode for it.

Table 186   Setting length/attenuation of the transmission cable on the CT1/PRI interface

Set the CT1/PRI interface to use the 
long-distance transmission cable

Set the CT1/PRI interface to use the 
short-distance transmission cable

Restore the default setting of the 
transmission cable used by the 
CT1/PRI interface

Table 187   Setting the line code format on the CT1/PRI interface

Set the line code format on the CT1/PRI interface

Restore the default line code format on the CE1/PRI interface