3com MSR 20-20 참조 매뉴얼

E1-F interface view

master: Adopts the internal clock as the clock source.

slave: Adopts the line clock as the clock source.

Use the fe1 clock command to configure clock source for the E1-F interface.

Use the undo fe1 clock command to restore the default, that is, line clock.

When the E1-F interface is working as DCE, choose the internal clock (master) for 
it. When it is working as DTE, choose the line clock for it.

# Use the internal clock as the clock source on E1-F interface Serial 2/0.

<Sysname> system-view

[Sysname] interface serial 2/0

[Sysname-Serial2/0] fe1 clock master 

fe1 code { ami | hdb3 }

E1-F interface view

ami: Adopts AMI line code format.

hdb3: Adopts HDB3 line code format.

Use the fe1 code command to set the line code format for the E1-F interface.

Use the undo fe1 code command to restore the default, that is, HDB3.

Keep the line code format of the interface in consistency with that used by the 
remote device.

# Set the line code format of interface Serial 2/0 to AMI.

<Sysname> system-view

[Sysname] interface serial 2/0

[Sysname-Serial2/0] fe1 code ami