3com 3031 Instruccion De Instalación
T1-F Interface
161
By default, the line clock of T1-F interface is
slave
clock.
Setting Interface Frame Format
T1-F interfaces support Super Frame (SF) and Extended Supper Frame (ESF). In SF,
multiple frames can share the same frame synchronization and signaling
information, so that more significant bits can be used for transmitting user data. In
practice, the system test is often required. The application of ESF technology can
ensure normal service when the system test is being carried out.
multiple frames can share the same frame synchronization and signaling
information, so that more significant bits can be used for transmitting user data. In
practice, the system test is often required. The application of ESF technology can
ensure normal service when the system test is being carried out.
Perform the following configuration in T1-F interface view.
By default, the frame format of T1-F interface is ESF.
Enabling or Disabling Local Loopback/Remote Loopback
An interface should be place in local loopback or remote loopback for some
special functionality tests.
special functionality tests.
Perform the following configuration in T1-F interface view.
By default, no T1-F interface is placed in local or remote loopback.
On an interface, using this command but with different arguments can
respectively enable local loopback and remote loopback, but these two functions
cannot be enabled at the same time.
respectively enable local loopback and remote loopback, but these two functions
cannot be enabled at the same time.
Displaying and
Debugging T1-F
Interface
Perform the
display
command in any view to display the state of T1-F interface
and other related information.
Restore the line clock of the T1-F interface to the
default setting
default setting
undo ft1 clock
Table 205 Setting frame format of T1-F interface
Operation
Command
Set frame format for a T1-F interface
ft1 frame-format { sf | esf }
Restore the default frame format of T1-F interface
undo ft1 frame-format
Table 206 Enabling/Disabling local/remote loopback on a T1-F interface
Operation
Command
Enable local/remote loopback on an
interface
interface
ft1 loopback { local | remote }
Disable local/remote loopback on
an interface
an interface
undo ft1 loopback [ local | remote ]
Table 204 Setting line clock for a T1-F interface
Table 207 Displaying and debugging T1-F interface
Operation
Command
Display configuration and state of T1-F
interface
interface
display ft1 [ serial serial-number ]
Display the operating state of T1-F
interface
interface
display serial serial-number