3com MSR 20-20 참조 매뉴얼

E1-F interface view

number number: Sets the number of interframe filling tags (an interframe filling 
tag is one byte in length). The number argument ranges from 0 to 14.

type { 7e | ff }: Sets the type of interframe filling tag to 0x7E by specifying the 7e 
keyword or to 0xFF by specifying the ff keyword. The default is 0x7E.

Use the fe1 itf command to set the type of and the number of interframe filling 
tags on the E1-F interface. Two types of interframe filling tag are available: 0x7E 
and 0xFF.

Use the undo itf command to restore the default.

By default, the interframe filling tag is 0x7E and the number of interframe filling 
tags is 4.

Interframe filling tags are sent when no service data is sent on the timeslots 
bundled into the logical channel on the E1-F interface.

# Set the type of interframe filling tag to 0xFF on E1-F interface Serial 2/0.

<Sysname> system-view

[Sysname] interface serial 2/0

[Sysname-Serial2/0] fe1 itf type ff 

# Set the number of interframe filling tags to five on E1-F interface Serial 2/0.

<Sysname> system-view

[Sysname] interface serial 2/0

[Sysname-Serial2/0] fe1 itf number 5 

E1-F interface view

None

Use the fe1 unframed command to configure the E1-F interface to work in 
unframed mode.

Use the undo fe1 unframed command to configure the E1-F interface to work 
in framed mode.

By default, the E1-F interface works in framed mode.