R0106-HP MSR Router Series Interface Command Reference(V7)

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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. Otherwise, the T1-F interface will not operate correctly.
Examples
# Set the interframe filling tag to 0xFF on T1-F interface Serial 2/1/0.
<Sysname> system-view
[Sysname] interface serial 2/1/0
[Sysname-Serial2/1/0] ft1 itf type ff
# Set the number of interframe filling tags to 5 on T1-F interface Serial 2/1/0.
<Sysname> system-view
[Sysname] interface serial 2/1/0
[Sysname-Serial2/1/0] ft1 itf number 5
Related commands
• ft1 code
• ft1 data-coding
ft1 loopback
Use ft1 loopback to enable a type of loopback on a T1-F interface.
Use undo ft1 loopback to restore the default.
Syntax
ft1 loopback { local | payload | remote }
undo ft1 loopback
Default
Loopback is disabled.
Views
T1-F interface view
Predefined user roles
network-admin
Parameters
local: Enables internal loopback.
payload: Enables external payload loopback.
remote: Enables external loopback.
Usage guidelines
Loopback is intended for testing only. Disable the feature when the interface is operating correctly.
The three loopback modes cannot be used simultaneously on a T1-F interface.
Examples
# Set T1-F interface Serial 2/1/0 in local loopback mode.
<Sysname> system-view
[Sysname] interface serial 2/1/0
[Sysname-Serial2/1/0] ft1 loopback local