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248 CHAPTER 15: T1-F INTERFACE CONFIGURATION COMMANDS
type { 7e | ff }: Sets the interframe filling tag to 0x7E by specifying the 7e keyword
or to 0xFF by specifying the ff keyword. On a T1-F interface, the default interframe
filling tag is 0x7E.
Description Use the
ft1 itf command to set the type and the number of interframe filling tags
on the T1-F interface. Two types of interframe filling tag are available: 0x7E and
0xFF.
Use the
undo ft1 itf command to restore the default.
By default, the interframe filling tag is 0x7E, and the number of interframe filling
tags is four.
Interframe filling tags are sent when no service data is sent on the timeslots
bundled into logical channels on a T1-F interface.
Do not use the ft1 itf type ff command if both the ft1 code ami command and
the ft1 data-coding inverted command are configured so that the T1-F interface
can function normally.
Example # Set the interframe filling tag to 0xFF on T1-F interface Serial 2/0.
<Sysname> system-view
[Sysname] interface serial 2/0
[Sysname-Serial2/0] ft1 itf type ff
# Set the number of interframe filling tags to five on T1-F interface Serial 2/0.
<Sysname> system-view
[Sysname] interface serial 2/0
[Sysname-Serial2/0] ft1 itf number 5
ft1 loopback
Syntax ft1 loopback { local | payload | remote }
undo ft1 loopback
View T1-F interface view
Parameter local: Sets the interface in internal loopback mode.
payload: Sets the interface in external payload loopback mode.
remote: Sets the interface in external loopback mode.
Description Use the
ft1 loopback command to set the T1-F interface in a loopback mode.
Use the
undo ft1 loopback command to restore the default.
By default, loopback is disabled.