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286 CHAPTER 17: FUNDAMENTAL CT3 INTERFACE CONFIGURATION COMMANDS
undo t1 line-number shutdown
View CT3 interface view
Parameter line-number: T1 line number in the range 1 to 28.
Description Use the
t1 shutdown command to shut down a T1 line on the CT3 interface.
Use the undo t1 shutdown command to bring up a T1 line.
By default, T1 lines are up.
This command shuts down not only the specified T1 line but also the serial
interfaces formed on it. Data transmission and receiving will stop as a result.
Likewise, the undo t1 shutdown command can bring up all these serial
interfaces.
Example # Shut down the first T1 line on interface T3 2/0.
<Sysname> system-view
[Sysname] interface t3 2/0
[Sysname-T3 2/0] t1 1 shutdown
t1 unframed
Syntax t1 line-number unframed
undo t1 line-number unframed
View CT3 interface view
Parameter line-number: T1 line number in the range 1 to 28.
Description Use the
t1 unframed command to set a T1 line on the CT3 interface to work in
unframed mode (T1 mode).
Use the
undo t1 unframed command to set the T1 line on the CT3 interface to
work in framed mode (CT1 mode).
By default, T1 lines are working in framed mode.
A T1 line in unframed mode does not contain the frame control information; it
cannot be divided into timeslots. For it, the system automatically creates a serial
interface numbered serial number/line-number:0. This interface operates at 1544
kbps and is logically equivalent to a synchronous serial interface on which you can
make other configurations.
Related command: t1 channel-set.
Example # Set the first T1 line on interface T3 2/0 to work in unframed mode.