3com 3031 Instruccion De Instalación

C

HAPTER

 14: WAN I

NTERFACE

 C

ONFIGURATION

will automatically generate a synchronous serial interface accordingly whenever a 
channel set is formed.

If a T1-F interface is connected to the transmission lines of various lengths, you 
should match attenuation or waveform of the interface signals with the 
transmission lines.

Perform the following configuration in T1-F interface view.

By default, attenuation matched a T1-F interface is 

long 0db

.

T1-F interface supports line code formats AMI (Alternate Mark Inversion) and B8ZS 
(Bipolar 8-Zero Substitution).

Perform the following configuration in T1-F interface view.

The line code format for an T1-F interface defaults to 

b8zs

.

If T1-F interface is used as DCE, the 

slave

 clock should be selected. If it is used as 

DTE, the 

master

 clock should be selected. 

If the T1-F interfaces of two routers are directly connected, they must respectively 
work in 

slave

 and 

master

 clock modes. If the T1-F interface of the router is 

connected to an exchange, however, the exchange is working as DCE and 
provides clock, so the interface of the router should work in 

master

 clock mode. 

Perform the following configuration in T1-F interface view.

Table 202   Setting length/attenuation of transmission line on a T1-F interface

Set the T1-F interface to use long-distance 
transmission line

Set the T1-F interface to use short-distance 
transmission line

Restore the default setting of the transmission 
line for the T1-F interface

Table 203   Setting line code format for T1-F interface

Set line code format for a T1-F interface

Restore the default line code format for a T1-F 
interface

Table 204   Setting line clock for a T1-F interface

Set line clock for a T1-F interface