686 CHAPTER 45: CPOS INTERFACE CONFIGURATION COMMANDS
Use the undo t1 set frame-format command to restore the default, that is, ESF.
Example # Set the framing format of T1 channel 1 to SF.
<Sysname> system-view
[Sysname] controller cpos 1/0
[Sysname-Cpos1/0] t1 1 set frame-format sf
t1 set loopback
Syntax t1 t1-number set loopback { local | payload | remote }
undo t1 t1-number set loopback
View CPOS interface view
Parameter t1-number: Number of a T1 channel on the CPOS interface, in the range 1 to 84.
local: Enables internal loopback.
payload: Enables external payload loopback.
remote: Enables external loopback.
Description Use the
t1 set loopback command to configure the loopback mode of the T1
channel.
Use the
undo t1 set loopback command to remove a loopback.
By default, loopback is disabled.
Loopback is intended for test use. Disable it otherwise.
Related command: display controller cpos t1.
Example # Enable external loopback on T1 channel 1.
<Sysname> system-view
[Sysname] controller cpos 1/0
[Sysname-Cpos1/0] t1 1 set loopback payload
t1 shutdown
Syntax t1 t1-number shutdown
undo t1 t1-number shutdown
View CPOS interface view
Parameter t1-number: Number of a T1 channel on the CPOS interface, in the range 1 to 84.
