3Com MSR 30, MSR 50 manual T1 unframed, Undo t1 line-numbershutdown, Related command t1 channel-set

286CHAPTER 17: FUNDAMENTAL CT3 INTERFACE CONFIGURATION COMMANDS

undo t1 line-numbershutdown

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-numberunframed undo t1 line-numberunframed

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.